Minutes of the CAMS 11th User Workshop Version 1.0 - Paris (online), 30st June 2021
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ECMWF COPERNICUS NOTE
Copernicus Atmosphere Monitoring Service
Minutes of the CAMS 11th User Workshop
Version 1.0
Paris (online), 30 st June 2021
Issued by: DLR / Thomas Popp
Date: 11/08/2021
Ref: CAMS94_2018SC2_202108_Minutes_Paris_v1.0Copernicus Atmosphere Monitoring Service
1 Online Agenda
Session Time Title
Welcome, introduction & overview 09:30 – 09:35 V.-H. Peuch - ECMWF
I. Benezeth - Coordinatrice interministérielle
09:35 – 09:40
Chair: V.-H. Peuch (ECMWF) Copernicus et GEO
09:40 – 09:45 J.-M. Carrière - Météo-France
Co-Chair: M. Domergue (Ministry H. Holin - Bureau de la Qualité de l’Air Ministère
09:45 – 09:50
for the Ecological Transition) de la Transition Ecologique
The UV index – an educational tool
09:50 – 09:55
(P. Cesarini - Securite Solaire)
Air quality reporting in France
09:55 – 10:00
(L. Rouil - INERIS)
CAMS product portfolio and future Update of CAMS product portfolio
10:00 – 10:10
updates / radiation and CO2 (S. Vermoote - ECMWF)
Plans for Copernicus CO2 Monitoring Service
Chair: V.-H. Peuch (ECMWF) 10:10 – 10:20
(R. Engelen - ECMWF)
CAMS product access (ADS) and user support
Co-Chair: M. Domergue ((Ministry 10:20 – 10:30
(Anabelle Guillory - ECMWF)
for the Ecological Transition *) CAMS Solar radiation service update
10:30 – 10:40 (M. Schroedter-Homscheidt - DLR and Y.-M. St.
Drenan – ARMINES / Mines ParisTech)
10:40 – 10:55 Questions (in the Q&A) and answers
CAMS show cases 1 CAMS radiation data use for agriculture
10:55 - 11:00
(C. Thomas - Transvalor)
HelioCLim business for large user community
11:00 - 11:05
Chair: A. Colette (INERIS) (E. Wey - Transvalor)
11:05 - 11:10 The Global Carbon project (F. Chevallier - LSCE)
Co-chair: E. Wey (Transvalor) Potential use of CO2 data
11:10 - 11:15
(C. Robert - CITEPA)
11:15 - 11:30 Questions (in the Q&A) and answers
General discussion
11:30 - 11:50
Online poll: major deficits and needs for CAMS
11:50 - 12:30 Plenary discussion focusing on poll highlights
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 2 of 29Copernicus Atmosphere Monitoring Service
CAMS product portfolio and future Update of CAMS product portfolio and use of
14:00 – 14:20
updates / air quality Sentinel data (V.-H. Peuch - ECMWF)
CAMS National Uptake scheme
14:20 – 14:30
Chair: G. Collin (MeteoFrance) (S. Vermoote - ECMWF)
CAMS Policy Products: updates 2020 and 2021
14:30 – 14:40
Co-chair: A. Colette (INERIS) (L. Rouil - INERIS)
Update on pollen products and use
14:40 – 14:50
(M. Sofiev - FMI)
14:50 – 15:00 Questions (in the Q&A) and answers
CAMS show cases 2 CAMS ensemble as input to local AQ forecasts
15:00 – 15:05
(C. Joly - AirParif)
Chair: G. Collin (MeteoFrance) Assessment of the impacts of the 2020 lockdown
on air quality and its subsequent health
Co-chair: A. Colette (INERIS) 15:05 – 15:10 consequences using CAMS emission and
exposure products (S. Medina - Santé Publique
France, A. Colette - INERIS)
Use of pollen information
15:10 – 15:15
(B. Guinot - RNSA)
CAMS-based information consistent with CNN
15:15 – 15:20 for Saudi Arabia
(J. Moussafir - Aria Technologies)
15:20 – 15:25 Use of CAMS (B. Quennehen - PlumeLabs)
15:25 – 15:45 Questions (in the Q&A) and answers
User needs and requirements Online whiteboard: collection of user needs and
15:45 – 16:00
requirements
Chair: S. Vermoote (ECMWF) Discussion:
Input through Q&A or orally
Co-chair: E. Wey (Transvalor) (after raising hand and invitation by chair)
Needs for CAMS service evolution and new
applications in France
16:00 – 16:45
Air quality service resolution / complementarity
of CAMS
Optimal scope of National Uptake scheme to
support French users
Expectations for satellite data
Workshop summary, concluding statements
16:45 – 17:00
(organisers)
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 3 of 29Copernicus Atmosphere Monitoring Service
2 Participants
Due to the Covid-19 pandemic this user workshop was again held as virtual meeting.
The workshop had altogether 128 participants (107 from France) from the following organisations:
• French Ministry of Higher Education, Research and Innovation
• French Ministry for the Ecological Transition
• Securite Solaire , Santé publique France
• Météo-France, INERIS, CNES, ONERA, CITEPA
• French regional / municipal authorities (Compagnie Nationale du Rhône, Atmo Nouvelle-
Aquitaine, ASTech Paris Region, AIRPARIF, Atmo Hauts-de-France, Qualitair corse, ATMO
GRAND EST, Atmo-Occitanie, Collectivité européenne d'Alsace)
• French SMEs (Sunny Shark, QuantCube Technology, GreenMe, eLichens, aero.obs-mip,
Prométhée, Mundi, Plume Labs, Transvalor , Fluidyn France, weatherforce, Capgemini,
NEXQT, Atmo AuRA, WaltR, ARIA, Lig'Air, Data4Risk)
• French companies (Noveltis, Thalesaleniaspace)
• OECD
• French research institutions (Laboratoire de l’Atmosphère et des Cyclones, RNSA, LMD,
Laboratoire d'Aérologie CNRS, Universite Grenoble, Universite Lille, LSCE, LISA, AERIS/ICARE,
CNRS, CESBIO, La Rochelle Université, Mines Paristech)
The workshop also had few other participants from Germany, Austria, the UK, Greece, Iran, Belgium,
Spain, Ivory Coast, Colombia; further participants representing CAMS and some CAMS use cases came
from ECMWF, DLR, FMI.
In order to protect personal data, the participant list is only handled as internal document inside
CAMS and kept as a separate Annex to these minutes. The participant list will not be published
together with this Minutes document.
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 4 of 29Copernicus Atmosphere Monitoring Service
3 Summary of presentations, questions and discussions
This workshop was co-organised by the Ministry of Higher Education, Research and Innovation, the
Ministry for the Ecological Transition, INERIS and MeteoFrance. Many thanks go to the French
organizing committee of Magali Domergue, Pascale Ebner, Isabelle Benezeth, Gaelle Collin, Augustine
Colette, Etienne Wey, Laurence Rouil and colleagues, as well as to Glasgows Ltd. for technical support.
All presentations are available on the CAMS website at https://atmosphere.copernicus.eu/cams-
atelier-virtuel-pour-les-utilisateurs-france. Additionally, audio and video recordings of the workshop
were made. A short summary of the main content of presentations and key discussion items is
presented in the following sub sections.
Morning session of the workshop
3.1 Welcome, introduction and overview
Participants were welcomed by representatives of ECWMF / CAMS and the co-organising ministries
and institutions as well as key national organisations related to CAMS topical areas.
Introduction by Vincent-Henri Peuch / Head of ECWMF
o short overview of the day:
o main scope is to present the range of products and tools
o including a few concrete use cases
o in order to stimulate further use of CAMS information
Welcome by Isabelle Benezeth / Coordinatrice interministérielle Copernicus et GEO
o New multi-annual Copernicus 2.0 framework
o No major change in scope, but a newcomer in governance with EUSPA
o Amongst important forthcoming space missions CO2M will provide unprecedented CO2
anthropogenic measurement starting 2025
o In the framework of the French Presidency of the EU (Q1/2022), France will organise a
Copernicus Conference 16-17/02/2022 in Toulouse, including a large focus on valorisation and
French plans for National Uptake
o An important strength of Copernicus is the long-term vision, with very large ambition at
present for atmospheric composition
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 5 of 29Copernicus Atmosphere Monitoring Service
Welcome by Jean-Marie Carrière / Head of Meteorological Services of Méteo-France
o Proud to co-lead the regional production together with INERIS
o CAMS is an excellent demonstration of the outstanding scientific skill in Europe with no other
equivalent worldwide of such a strong ensemble of regional models
Welcome by Hubert Holin / Bureau de la Qualité de l’Air Ministère de la Transition Ecologique
o The French Ministry of Ecological Transition is a very intensive user of CAMS, for direct use,
but also through experts working in support for the ministry
o Some of the tools are also not yet at the required resolution for uptake at national level, a
good example is the Air Control Toolbox, for which a national version would be a nice addition
o Support the previous speaker in pointing out that CAMS is an example of European excellence.
It is also demonstrated by the keen interest of EEA for CAMS products as well as SMEs now
largely relying on CAMS to develop downstream services.
The UV index – an educational tool by Pierre Cesarini / Securite Solaire
o Sun Safety is working in support of WHO since 1994 in awareness raising about health impacts
of UV exposure and skin cancer which is causing 2000 deaths/year in France and is the first
cause of death by cancer for young adults
o UV forecasting data is obtained from Meteo-France, but CAMS is identified as a key source of
reliable information in the field
Air quality reporting in France by Laurence Rouil / INERIS
o INERIS is a long-time provider of Air Quality expertise in support of the ministry, in particular
in relation to forecasting through the national platform Prevair in collaboration with Meteo-
France and CNRS
o Now also a strong contributor to CAMS Services, which illustrated the benefit between
European and national tools
o The policy Service of CAMS is designed to address the concerns of member states to rely on
robust scientific data to support their implementation of EU regulatory obligations
o Policy priorities: CAMS/EEA/JRC to develop and assess regulations, not implementation of Air
Quality Directives (AQD) attributed to member states
o CAMS is also a good example of the uptake for use in the private sector through open data
o This workshop is an excellent opportunity to get feedback and help progress in the system
Questions & answers
Q by Salim DERROUICHE for Mr HOLIN: he spoke about issues related to pollen. Can he tell us more?
Also, is pollen a major issue for remote sensing monitoring from space? How is it a major issue?
A: Forecasts, for different pollens (in development phase), are available on the CAMS website, on
the forecasts page, and accessible through the drop-down menu of parameters: http://macc-raq-
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op.meteo.fr/index.php?category=ensemble&subensemble=hourly_ensemble&date=LAST&calculati
on-model=ENSEMBLE&species=o3&level=SFC&offset=000
At the moment there is no satellite observation of pollen. In this case we use numerical models and
in situ observations. Mikhail Sofiev will give a presentation on this subject this afternoon.
Q by Salim DERROUICHE: General question. Is there someone who could say a word about the calls
for projects related to the use of satellite data for the observation of the atmosphere (air quality);
unless it is completely outside the scope of this day.
Comment by Carole DENIEL: CNES also has an annual RPA to support the French community wishing
to undertake R&D work in the use of new space missions. The CNES RPA is indeed very important,
especially for new missions.
3.2 CAMS product portfolio and future updates / radiation and CO2
CAMS product portfolio by Stijn Vermoote / ECMWF
o brief introduction of the CAMS information flow
o overview of the CAMS service and its portfolio
o past, current and near future (forecasts) of global atmospheric composition
o the ozone layer
o European air quality
o emissions and surface fluxes of key pollutants and greenhouse gases
o solar radiation
o climate radiative forcing
o documentation and quality control
Plans for Copernicus CO2 Monitoring Service by Richard Engelen / ECMWF
o Very encouraging signal that top level EU relies on Copernicus for Green Deal, and Paris
Agreement implementation/testing
o CAMS provides additional emission information (e.g. spatial + temporal frequency) compared
to official reporting which is limited to country total
o Very strong involvement in developing methods for emission inversions, first concrete
products with the Verify country factsheets
o CO2MVS will be an essential component of Copernicus 2.0 designed to be operational in 2026
CAMS product access (ADS) and user support by Anabelle Guilleroy / ECWMF
o Showcase of the ADS one stop shop for all CAMS products
o Advise to direct questions to CAMS support and user forum
o Freely useable and reusable with a lot of support available
CAMS Solar radiation service update
by M. Schroedter-Homscheidt / DLR and Yves-Marie St. Drenan / ARMINES and Mines ParisTech
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o The CAMS Radiation Service provides solar irradiation
o at the point of interest as a time series in the requested temporal resolution
o easy access as the spatio-temporal interpolation challenge is solved for the user
o one gridded dataset available as well – ADS integration will provide more options
o A new CAMS Radiation Service V4 will be released soon
o using C47R1 aerosols and replacing C46R1 period by new aerosols
o update in SEVIRI calibration
o probabilistic cloud masks of APOLLO_NG
o no COD clipping for small values anymore
o direct irradiance will fit better to pyrheliometer observations
o Preparations for Himawari-8 and GOES were done with very nice validation results
Questions & answers
Q by Salim DERROUICHE for Stijn VERMOOTE: he says that CAMS can be used to get emission
inventory data (if I understood correctly). How can we correlate CAMS data to land-based sources?
A: CAMS provides emission inventories for the global (10km resolution) and European (~5km)
scales. These inventories take the sources into account.
Q by Nicolas Fournier: Do you have any insight on how and if these CAMS emission data are
currently used by end-users (government and industry) in their TCFD reporting?
Q by Salim DERROUICHE to Anabelle GUILLORY: The forum is a good thing. However, how can we
rely on forum discussions? Are the discussions verified?
Q by Manuel Cheve: Is the login/password needed for the forum the same as the one used to
connect to ADS?
A: To use the Forum or the Support Portal, you need to register with ECMWF at
https://apps.ecmwf.int/registration/ - this ECMWF account is independent of the ADS account.
Q by anonymous attendee: Why has public awareness/communication on air quality and/or the
solar index never been at the level (will and means) of that of Covid-19, financed by public
authorities (local, communal, governmental, global), and therefore by taxpayers? As actors in the
front line of scientific information (CAMS), could we not participate in/ask political decision makers
to urgently disseminate messages such as "Don't take your car just to get bread" "Protect yourself
from the sun if exposed for more than so many seconds/minutes" etc.? Don't you think that the
general public lacks simple, concise and understandable information (as has been proven for Covid)
when society has shown that it is possible?
A: There are several aspects to your question. Firstly, the means allocated to the various policies are
decided by the representatives, whether national or local. It is through them that wishes can
become action. As far as communications are concerned, several exist, disseminated by the
government or by other actors. There is even a day dedicated to air quality, the next one being on
14 October: https://www.ecologie.gouv.fr/jnqa
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 8 of 29Copernicus Atmosphere Monitoring Service Q by Anton Driesse to Marion: Will you provide circumsolar separately? A: The preparation of circumsolar radiation is not currently planned. That being said, this is a topic we are currently actively investigating. So maybe in the future... What would be your requirement? Circumsolar ratio or circumsolar radiation? And you may calculate it from the expert mode 1 min data. The cloud modification factor is a constant per cloud type. Cloud type, cloud optical depth, clear sky radiation and solar zenith angle are given in this expert mode files. From that you could calculate it. Indeed, I'm thinking about to include this as dedicated output column. Or at least a chapter in the new user guide on how to obtain it from the expert mode data. As said, it would be good to hear your view which circumsolar parameter would serve best your needs. Q by Nicolas Fournier: How do the CAMS emission tools compare with US ones such as FLIGHT? A: FLIGHT is a very nice interactive tool based on the US reported emissions. The CAMS global emission data set uses the same underlying data as input, but there might be some differences because CAMS tries to use a consistent approach for all countries in the world, as much as possible, and provides gridded maps at roughly 10 km spatial resolution. I can check with our CAMS emission data providers to check if they have carried out more detailed comparisons. We also collaborate with EPA and emissions will certainly get more attention in our discussions in the coming years. Q by Alice Lemant: I'm not sure I understand, the CDS is the API to access the same data as the ADS? A: Not quite. ADS and CDS are clones. ADS provides CAMS data and CDS provides C3S (Climate change service) data. ADS (and CDS) offer interactive and API access, which leads to the same data. The ADS uses the same API software as CDS (it is called the "CDS API") to programmatically access the data in CDS or ADS. BUT....the API key and URL in the .cdsapirc file is different. See https://ads.atmosphere.copernicus.eu/api-how-to ADS: https://ads.atmosphere.copernicus.eu/#!/home CDS: https://ads.climate.copernicus.eu/#!/home Q by anonymous attendee: Are there any planned improvements related to the use of the new satellites replacing the MSG? A: Very quickly: yes! MTG will carry in particular the Sentinel-4 instrument, which will measure a number of pollutants that are very important for CAMS. On board MTG, there will also be an instrument measuring in the infrared, which will also be very useful for the improvement of the CAMS data. Q by anonymous attendee: In other words, there is (some) regular talk about anthropogenic gas emissions and their effects on climate change and the deleterious impacts of air pollution, but there is virtually no visible action by the public authorities. Why is this so? A: Air quality actions do take place, but they may be technical, or take time (several years, perhaps) to implement. Some are well known, such as the implementation of low emission zones. It is also important to be aware that, apart from exceptional situations, air quality measures generally have a relatively small individual effect, and that many measures need to be combined in order to have a significant overall effect. A fundamental aspect of the implementation of measures is of course their social acceptability, which in turn depends on the accompanying measures. Q by Denis Jouglet: Which CO2 satellite products do you plan to use for CO2 models? CAMS94_2018SC2 – Minutes Paris (online) workshop Page 9 of 29
Copernicus Atmosphere Monitoring Service
A: We already use observations of atmospheric CO2 from OCO-2, GOSAT, and IASI. For the future,
the new Sentinel CO2M will of course be important and is being designed and build with the
requirements for the CO2 service in mind. But we will also use and benefit from other missions,
such as the follow-ons for OCO and GOSAT, as well as new European mission, such as MicroCarb.
We also work closely with CEOS (the Committee on Earth Observation Satellites) to align efforts and
benefit from everyone’s expertise and plans. In addition, satellites that help to estimate the fluxes
from the land surface and the ocean will also be considered.
3.3 CAMS show cases part 1
CAMS solar radiation data use for agriculture by Claire Thomas / Transvalor
o Interest for both CAMS Radiation Service and CAMS MacClear (CAMS Radiation Service
equivalent to clear sky with no clouds) for agriculture use
o 2 main projects
o PAREO project (Photosynthetically Active Radiation & Earth Observation) for
agriculture, viticulture, phyto-culture
o Anomalies and Variability project: how does a current year compare to its equivalent
in the past?
▪ Show case on Viticulture in 2020: prototype was able to investigate why grape
harvests were earlier (photosynthesis anomaly due to solar radiation
exceedance)
HelioClim business for a large user community by Etienne Wey, /Transvalor
o 2020 access to CAMS Radiation and Helioclim was large:
o CAMS radiation through the ADS and SoDa website: more than 3000 registered users,
370 active users
o Helioclim: 120 annual subscriptions
o Presentation of 2 new services:
o Web Processing Service WPS for downscaling at urban scale solar irradiance and PV
power output) → PhotoVoltaic self consumption
o Solar radiation forecast for Day+1
o Conclusion: new uses from both CAMS Solar Radiation Service and Helioclim products are
typically the following ones: help finding an appropriate location, calculating the
supply/demand balance, supporting production trading, etc.
The Global Carbon project by Frédéric Chevallier/ LSCE
o Evaluation and Quality Assurance Reports already available for 10 years for CO2, CH4 and N2O
(with surface data and/or satellite data)
o Next steps:
o Increasing the spatial resolution of the transport model (target=1° by end of 2023)
o Assimilation of new satellite data (TROPOMI for CH4, IASI for N2O, …)
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 10 of 29Copernicus Atmosphere Monitoring Service
o Towards a larger Copernicus anthropogenic CO2 monitoring & verification support
capacity (CO2M, CoCO2, …)
Potential use of CO2 data by Colas Robert / CITEPA
o CITEPA is responsible for yearly update of national inventory of greenhouse gas and
atmospheric pollutants, and uses Copernicus surface data (Urban Atlas, etc).
o CITEPA is interested in getting quality assessment for verification, as well as refine the spatial
and temporal resolution, and also get access to additional data to make up for uncertainties
o Main challenges and limitations: comparison between inventory estimation and satellite data,
need to get ready to use products, needs to develop links with research and spatial
communities (H202Verify, CoCO2, RECCAP-2…)
Questions and answers
Q by Salim DERROUICHE: Is it possible that one day free access to CAMS data will be replaced by
paid data, taking geopolitical, geostrategic and financial aspects into account?
Q by Salim DERROUICHE: I am just trying to understand. Does an SME or a private company own a
satellite? Did it finance the launch? Did it participate in the financing of the satellite (design,
construction, use, maintenance, etc.)? Can the data collected by a private company also be
collected by anyone else? Or does the private company simply offer to collect and use the data on
behalf of individuals, communities, etc.?
A: I don't know if I understand your question correctly. CAMS only uses freely available satellite data
(starting with Copernicus Sentinel data, but also data from national space agencies like CNES, NASA,
JAXA or international agencies like EUMETSAT, ESA...). Public or private entities respond to our calls
for tender and can use these data to provide service elements, respecting the corresponding
licenses of use. Other Copernicus services need satellite data that can be commercialized, in
particular for very high resolution imagery (security...). There are new private actors like GHGSat
who have sensors (in this case for CH4 and CO2 in the future) and commercialize their data. A
number of collaborations with such actors are underway to estimate the added value of such
instruments compared to the Sentinels (current and future as presented by Isabelle).
Q by Thierno Doumbia: If a private company wants to use Copernicus data in a product it sells, what
are the constraints related to the intellectual property of the data (for example, does the company
have to be European, ...)?
A: The license for the use of Copernicus data provided through the ECMWF-led Services (CAMS and
C3S) is here: https://apps.ecmwf.int/datasets/licences/copernicus/. See section 6 on IPR. There is
no limitation on the nationality of companies that can use CAMS/Copernicus data.
Q by Alexandre FALGON for Etienne Wey: For the D+1 irradiation forecast model, could you please
communicate the performance level (whatever the performance metric). Which weather model(s)
(NWP) are taken into account? What resolution for the model?
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 11 of 29Copernicus Atmosphere Monitoring Service
A: It is difficult to give a level of performance, as it depends of course on the geographical location
and the local meteorological variability. Generally speaking, for the sites we tested (mainly BSRN
stations), the comparison of the forecast with the measurements gave a bias roughly equal to that
of HeclioClim-3 and an RMSE slightly worse. For the moment, we use GFS data and the resolution of
the model is the same as that of HelioClim-3, i.e. about 4-5 km for France. The person in charge of
this product at Transvalor is alexandre.boilley@transvalor.com whom I suggest you contact directly
for more information. Detailed information is available here http://www.soda-pro.com/soda-
products/ai-forecast with BSRN validation results http://www.soda-pro.com/help/validation/ai-
forecast-bsrn
Q by anonymous attendee: Are there any plans to study NOx as part of the global carbon project?
A: Yes, NOx observations give us information on the location of plumes from fossil CO2 emissions
and on CO2 emissions co-emitted with NOx. This is a very active research topic with strong issues
such as the knowledge of NOx:CO2 emission ratios or the lifetime of NOx. These aspects are studied
in the H2020 CoCO2 project presented by Richard Engelen.
Chat by Frederic Chevallier to C. Robert The brevity of my presentation didn't allow me to go into
detail, and I'm bouncing back here on the question of the scientific aspect of the UNFCCC national
reports: it is undeniable, especially with the involvement of the IPCC to define the reporting rules.
On the other hand, many of the figures on vegetation and soil fluxes are not reproducible from the
documentation provided (e.g. those from Canada) and are therefore not very comparable to those
in the scientific literature. I would be happy to discuss these issues further with you.
Chat by Colas Robert to F. Chevallier, thank you for these clarifications! Indeed, the reliability (and
transparency/reproducibility) of the data provided to the UNFCCC depends a lot on the countries.
Even more so for GHG fluxes from biomass and soils ... and a fortiori in so-called unmanaged areas
such as in northern Canada... I look forward to discussing this too!
3.4 General discussion
In order to actively obtain feedback from the large audience, the discussion was initiated with an
online poll on major deficits and needs for using CAMS. Results of those simple discussions are
presented here – about half of the attendees took part in the online poll.
Poll questions: Major needs for using CAMS
• Have you participated in an earlier MACC / CAMS user workshop?
o Total: 47 / No: 39 / Yes: 8
• Have you used CAMS output in your work?
o Total: 49 / Yes: 41 / No: 8
• Which are the 3 most interesting CAMS product categories for you?
o Total: 48
o Regional Air Quality: 32
o Global Atmospheric Composition: 27
o Inventory-based Emissions: 23
o Greenhouse gas fluxes: 16
o Air Quality Policy Products: 15
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 12 of 29Copernicus Atmosphere Monitoring Service
o Solar radiation: 11
o Radiative forcing: 7
o UV: 6
• How well do you know the CAMS portfolio?
o Total: 48
o portfolio overview: 24
o some idea: 20
o product details: 3
o Not at all: 1
• Are there major missing products in the CAMS portfolio?
o Total: 43 / No: 28 / Yes: 15
• Do key CAMS products need improvement?
o Toital: 39 / Yes: 24 / No: 15
• What obstacles do you see for using CAMS products (more)?
o Total: 38
o Expertise: 16
o Time: 6
o Data access: 6
o Downscaling method: 6
o Format: 4
Plenary discussion focusing on poll outcome highlights
There were following suggestions / requirements made with regard to the online poll questions on
missing products (35% wrote “yes”) and on needed improvements (62% wrote “yes”).
o Users are now looking for expertise support.
o Users are seeking for more training (MOOC? Workshop, Youtube tutorials…), not only on the
data use, but also on what it is and what it can be used for, on the tools to use NetCDF or GRIB
data…
o Users request larger access to IFS data (meteorology)
Afternoon session of the workshop
3.5 CAMS product portfolio and future updates / air quality
Update of CAMS product portfolio and use of Sentinel data by Vincent-Henri Peuch / ECWMF
o CAMS continuous service evolution is driven by user needs
o Another key driver: evolution of observing systems
o ~ 6-monthly system upgrades of CAMS
o Recent new products: CO2 and CH4 global reanalysis
o Use of S5P TROPOMI satellite data: total column O3, SO2; further variables in testing
o Examples for impact of TROPOMI: O3, NO2, SO2, AOD
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 13 of 29Copernicus Atmosphere Monitoring Service
CAMS National Uptake scheme by Stijn Vermoote / ECMWF
o CAMS provides information products directly relevant for European and
international policies, where Member States have mandate and responsibility
o The National Collaboration Programme is to support collaboration, uptake and joint work
between CAMS and EU member states
o Expected benefits go both ways:
o provide to CAMS users seamless higher resolution products that correspond to
official member state Air Quality information
o improve the quality of CAMS products by scrutinizing CAMS emissions (inventories
and observations-based) with national and local emissions datasets and expertise
o implementation principles:
▪ one contract with CAMS in each EU27 + associated country; national
Copernicus Committee representative determines best suited contractor(s)
▪ detailed work plan to be defined annually together to adapt to the specific
needs, scientific/technical readiness and to define realistic objectives
▪ Collaborations also strengthen uptake / awareness about CAMS products at
national level (maybe a way forward to communicate in all EU27 languages)
▪ Mostly virtual interactions, possibly a “live” annual event of all
▪ Current budget available on order of €100k per member state per year; aim
to start contracts with countries first half of 2022
▪ further funding for co-design of CO2 monitoring products between CAMS and
member states
CAMS Policy Products: updates 2020 and 2021 by Laurence Rouil / INERIS
o CAMS is only providing European scale data and services, it is the mandate of the member
states to put in place the means to comply with the AQ rules
o Overview of the policy “products”, assessment reports, Air Control Toolbox (ACT), source-
receptor analysis at the countries levels
o Examples of 2020 being a low ozone year, 60% NO 2 reduction due to lockdown, how to use
the ACT and source-receptor annual information for major European cities
Update on pollen products and use by Mikhail Sofiev / FMI
o explanation which types of pollen are predicted and how the pollen is initially generated in
the models from a measurement network
o example of the usefulness of the forecast service / timely medication
Questions and answers
Q by Delphine Nobileau: Why not use Sentinel 5P data for NO2 assimilation?
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 14 of 29Copernicus Atmosphere Monitoring Service A: We are almost ready to use S5P NO2 in the CAMS global forecasting system. It has taken more time than expected, because ESA had to implement several upgrades before the product was consistently meeting our requirements (note that this a very new instrument). The next step will then be to use the observations to also improve our knowledge of the underlying emissions (similar to and connected to the CO2 plans). Q by Salim DERROUICHE: How can we correlate data measured by satellites with data measured on the ground by fixed stations, or even modelled data? First of all, the units are not the same (it seems to me) and the temporal data are not comparable since the satellites are not geostationary (for the moment). A: The link between the variables to be estimated (e.g. CO2 fluxes) and the observations is made with a numerical model of 3D atmospheric transport. Its variables are defined over the entire globe at each time step and it can therefore be compared with all available observations regardless of their nature or unit. Q by Denis Jouglet: What is the status (operational, pre-operational, etc.) of CAMS CO2 and aerosol analyses and forecasts? Is it advisable / inadvisable to use them in near real-time operational processing chains? A: These analyses and forecasts are operational. Like all CAMS products, they have a validation domain which we try to document, even though validation data may be missing. Please do not hesitate to contact CAMS support if you have specific questions about a product's validation domain. Q by Salim DERROUICHE: CAMS provides, if I understand correctly, emission inventories. A question from a colleague: do we have an example of what CAMS produces? visually, temporally, "historically"? What I'm wondering is instantaneous inventory, yes, but we need to ask ourselves what we use our inventories for in their current form, and what we would do with a "satellite" inventory? Q by Salim DERROUICHE: Is it possible/possible to offer training for the use of CAMS services? A: Link to MOOC on CAMS available at https://atmosphere.copernicus.eu/training Q by Nicolas Fournier: Expertise development via secondments/assignment between academia/industry Q by anonymous attendee: Are there any free and easy to use tools (mini GIS) to read/display the CAMS format? Will we talk about it this afternoon? A: CAMS data are generally available in NetCDF and GRIB formats. There are a number of software tools that can be used to exploit these formats. A simple tool is Panoply for example. Some of our users also offer nice visualisations of CAMS forecasts. See for example: windy.com (there are 9 CAMS parameters available, including PM2.5, NO2, ozone column...). Q by Visio ATMO-NA: We are several AASQA to start using pollen forecasting data, but we have difficulties to obtain information on the mode of production of the data (raw data, assimilated data, CAMS94_2018SC2 – Minutes Paris (online) workshop Page 15 of 29
Copernicus Atmosphere Monitoring Service sources of emissions...), and we would be very interested to exchange with the services producing the data, A: You can contact us: https://ads.atmosphere.copernicus.eu/cdsapp#!/usersupport Q by anonymous attendee: Hello, once the MTG satellites are commissioned, what would be the approximate timeframe for the integration of the new images into the CAMS service in order to increase the quality, resolution and frequency of solar irradiance data? Q by Steve Tueno: When will data be available in mg/m3 instead of kg/kg? (salt, dust, ...)? Is there a 100% accurate way to convert between these 2 units? Q by Salim DERROUICHE: Concerning the TROPOMI instrument and its NO2 measurements, what is the height of the tropospheric layer considered? A: The satellite measurement is a vertically integrated quantity from the surface to the tropopause (0-10km). It is the 3D numerical model that then allows to deduce the consequences for the concentrations at the surface. Q by Leo Bourbon for Vincent-Henri Peuch: You said that Sentinel-5P measures NO2 in the tropospheric column. What is the height of the tropospheric column measured? A: This varies from day to day and with the seasons (and latitudes). On average, the tropopause is about 10 km away. S-5P therefore measures the integrated amount of NO2 between about 0 and 10km. Q by Salim DERROUICHE: I didn't quite understand the problem of measuring NO2 by TROPOMI. A: The satellite measures the absorption by the atmosphere of chemical constituents in specific spectral bands. To deduce the tropospheric column of NO2 (or other constituents that also absorb radiation), "inversions" must be performed, which relies on radiation modelling. This step is complex. So far, the inversion product provided by ESA does not have the required quality level to be taken into account without degrading the CAMS products. These problems will be corrected with the ESA processing update, which is scheduled for October 2021. Q by Atmo Aura – Lyon: What is the altitude in m or pressure of the tropospheric column in the S5P output tropospheric NO2 please? A: About 10000m, 250hPa, but the detailed calculation is based on the potential vorticity PV. If there is no strong NO2 gradient at these altitudes (which is generally the case), it does not matter much because the vast majority of NO2 is in the planetary boundary layer. Q by Atmo Aura – Lyon: What do you call assimilation? In a dispersion model by correcting the modelled concentrations? As an input to emissions? A: It would take some time to answer. Assimilation is a process of combining observations and modelling. It can be implemented in different ways as you indicate. At present, for the majority of CAMS products, the modelled concentrations are corrected. In the future, as presented this morning, we will also work on emission correction. The CAMS surface flux products for greenhouse gases (mentioned by Frederic Chevallier) are already based on this methodology. Ultimately, we believe we can optimize concentrations and emissions at the same time. CAMS94_2018SC2 – Minutes Paris (online) workshop Page 16 of 29
Copernicus Atmosphere Monitoring Service
Q by Salim DERROUICHE: Would government institutions be able to use satellite data to check air
pollutants emitted over industries?
A: This depends on the importance of the emissions generated by these industries in relation to the
background concentrations and the sensitivity (accuracy) of the satellite instruments. Richard
Engelen quickly showed this morning the system that has been set up to detect potential methane
emissions or leaks.
Q by Salim DERROUICHE: Thank you for your feedback Mr PEUCH. In response to your answer, does
CAMS propose to find the concentrations on the ground?
A: Yes, of course. CAMS data are usually 3D fields including surface values. This is the added value of
the service compared to the direct use of satellite data which do not generally correspond to
surface concentrations. Another advantage of CAMS products is the temporal dimension (hourly or
tri-hourly depending on the product). Satellites often offer only one measurement per day.
Q by Salim DERROUICHE: Concerning the Air Control Toolbox: how big can the tool go? (countries,
regions, departments, municipalities)
A: ACT covers Europe. Recently, it has been possible to distinguish the contributions of different
countries at a given receptor point. The spatial resolution remains relevant for "background"
pollution with a 20km grid, but as Hubert Holin indicated this morning it would be possible to
develop a national version. Maybe some perspectives for the national uptake mentioned by Stijn?
Q by Salim DERROUICHE: Satellites do not allow pollen to be measured but probably indirectly?
A: This is not possible for the moment, but with very high resolution satellite (less than 10m), it
might be possible to detect the dark greening for the ragweed zones before the pollen is released.
Chat by Gaelle Collin: In addition, for uses in the European domain in particular, the Météo-France
data are available as public data
Chat by Jerome Riedi: What mechanism is in place to allow scientific teams to propose new
products or improvements of existing products?
3.6 CAMS show cases part 2
CAMS ensemble forecast as input to the “Qualite de l’air” local forecasts by Cyril Joly / AirParif
o North-East of France AQ forecast, using an ensemble of 18 deterministic models, including the
9 CAMS regional models
o Lasso based fitting aggregation using past 7 days of observations to predict the next 3 days,
with quite good results
Assessment of the impacts of the 2020 lockdown on air quality and its subsequent health
consequences using CAMS emission and exposure products by Sylvia Medina / Santé Publique and
Augustin Colette / INERIS
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 17 of 29Copernicus Atmosphere Monitoring Service
o INERIS created a QHIA (quantitative health impact assessment) map for France for the spring
2020 period, based on PM10, NO2 and PM2.5 decrease
o Santé Publique estimated the effect of this decrease in terms of prevented death for PM2.5
and NO2
o The conclusion is that even short term reduction in air pollution(AP) has noticeable effects
o Pre-warning was given on the future lowering of the AP limits by Europe and all the effects it
will trigger for each MS
Measure and forecast the short-term pollen allergy risk by Benjamin Guinot / RNSA
o Importance of the real time measurements
o Take into account the risk cofactors for the sanitary response
o Need to use several models to assess the uncertainty
High resolution AQ forecast using CAMS data by Boris Quennehen / Plume Labs
o Presentation of the Air Report product, the Plume.io API, and the Flow measurement device
o Illustration of the effect from the CAMS data on the model output quality
o Examples of downstream products from Plume Labs
CAMS-based information consistent with CNN for Saudi Arabia by Jacques Moussafir / ARIA
o What is the expertise of ARIA technologies
o The NEC National Scale project in Saudi Arabia, connected to Copernicus, uses
WRF+CHIMERE+FARM+PMMS models to downscale, national 4 km resolution AQ forecast and
5 m resolution AIRCTY for 6 major cities
o Description of the AIRCITY product and results
Questions and answers
Q by anonymous attendee: What is the ground resolution of the S5P column?
A: This is 3.5km x 5km.
Q by anonymous attendee: Since the height of the column is 10km what are the ground
dimensions? 1Km x 1Km?
A: 3.5km x 5km.
Q by anonymous attendee: What is the target of the linear model taking the series of the 18 models
as input?
A: The target is the measurement stations observation, a-posteriori controlled.
Q by anonymous attendee: were warnings/awareness-raising to the French of worsening Covid
symptoms linked to atmospheric pollution communicated during the crises/confinement? If not,
why?
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 18 of 29Copernicus Atmosphere Monitoring Service A: Air pollution through its pro-inflammatory and oxidative stress effect increases the vulnerability of the population to different risk factors, and this has been repeatedly reported. The study of the specific role of pollution in the aggravation of Covid symptoms is extremely complex and the studies published to date are very limited in their interpretation and criticized by peers. We will have to wait for a stabilisation of the epidemic and the possibility to work retrospectively on population cohorts. Q by anonymous attendee: Why does France prefer to pay fines to the EU for exceeding the air pollution alert threshold rather than take health measures? Q by Salim DERROUICHE: Is the alergic population manifestation and the increase in O3 an observation or a correlation you are making? A: The result is a correlation between the 3 datasets (pollen, ozone, health index) for the 8 years of the study. Q by anonymous attendee: What types of pollutants are measured with the Flow equipment? Is it an aggregate pollution indicator that is obtained or can the different types of pollutants be differentiated? A: Flow measures NO2 and an aggregated estimate of VOCs, PM10, PM2.5 and PM1. The data for each pollutant is available (downloadable from the application or via an API) in ug/m3 and in our IQA. Q by Adrien Royer to Boris: For the D+7 forecasts, you will therefore do without CAMS data as a predictor? A: Yes, the forecast will be driven by CAMS for the first 4 days and then the model will have more freedom for the next 3 days. It is notably for this approach that we had to switch to more complex AI technologies. Q by anonymous attendee for Plume Labs: Does your Deep Learning forecasting system allow you to make action scenarios? How can an event not learned in the learning process be predicted? A: You are indeed touching on a limit of our approach, the prediction of extreme events (including those already observed!) is complicated because of their low occurrence and our performances are necessarily affected. Q by Delphine Nobileau: Last month the AI4EO (Phi-lab) challenge to improve the spatial resolution of the S5P-NO2 (7km to 1km) and CAMS-PM2.5 (10km to 2km) air quality products ended. Will you use the results of this challenge to provide results at local scale - over cities for example? Q by anonymous attendee: The Covid crisis has however imposed unacceptable solutions on the population. Thank you for relaying Gaëlle. A: These measures were taken in an exceptional context. They cannot be generalised, made permanent, in the functioning of our democracy. That said, this period has also made it possible to realise that "business as usual" is not inevitable. Very fundamentally, societal choices are everybody's business, and cannot be imposed, but can evolve. CAMS94_2018SC2 – Minutes Paris (online) workshop Page 19 of 29
Copernicus Atmosphere Monitoring Service Q by anonymous attendee: Many projects are moving towards the use of AI. While models and emissions allow us to make scenarios and to have knowledge of the levers of action and the phenomena at play, there is a taste of abandonment of this discipline in favour of new technology that replaces and does not complement it. The use of AI, although interesting, is not doomed to failure by trying to replace an existing solution? Have dispersion models built with physical and chemical equations reached their limits? Isn't the CAMS ACT toolbox a good example of the fact that there are interesting prospects in relying on both deterministic models and statistical emulators to best meet user needs? A: https://policy.atmosphere.copernicus.eu/CAMS_ACT.php Chat by Hubert Holin: The small differences observed when switching from double precision to single precision is surprising. Is it associated with improvements in the code (algorithms, coding efficiency associated with smaller steps...)? Is it in view of the use of GPUs? Chat by Vincent-Henri Peuch: The move to simple precision is indeed the result of very important developments by the ECMWF teams and it was not won in advance. CAMS was able to benefit directly from this work. This makes it possible to have a code that is less expensive in terms of computing time. For weather forecasting, it allows us to consider larger ensembles and finer resolutions for an equivalent computational cost. For CAMS, it also allows to prepare the increase of the global resolution and to include a more detailed modelling of aerosol related processes in particular. Chat by Augustin Colette to Cyril: As I said last week, we are in the process of finalising a CAMS Service (63) focused on the implementation of innovative machine learning methods to improve CAMS post-processing. INERIS was in charge of coordination and statistical adaptations, but it was Mikhail Sofiev (FMI) who worked on the ENSEMBLE optimisations that are closer to your work. We are going to make these developments operational in the next phase of regional CAMS. I hope we will have the opportunity to compare our approaches! Chat by Sylvia Medina: As agreed, here are the Santé publique France publications related to my presentation: - Adélaïde L, Medina S, Wagner V, de Crouy-Chanel P, Real E, Colette A, Couvidat F, Bessagnet B, Alter M, Durou A, Host S, Hulin M, Corso M and Pascal M (2021) Covid-19 Lockdown in Spring 2020 in France Provided Unexpected Opportunity to Assess Health Impacts of Falls in Air Pollution. Front. Sustain. Cities 3:643821. doi: 10.3389/frsc.2021.643821- Medina S, Adélaïde L, Wagner V, de Crouy Chanel P, Real E, Colette A, Couvidat F, et al. Impact of ambient air pollution on mortality in metropolitan France. Reduction in relation to spring 2020 containment and new data on total weight for the period 2016-2019. Saint-Maurice: Santé publique France, 2021. 63 p. Available from URL: www.santepubliquefrance.fr Chat by Vincent-Henri Peuch: Concerning the forecast horizon (D+4 for CAMS regional/Europe and D+5 for CAMS global), this corresponds to the need already expressed by users. It is technically possible if the need is expressed to progressively lengthen the deadlines (up to 10 days). 06:45:20 Glasgows Events: https://app.sli.do/event/b6yg1bpa 07:03:03 Hubert Holin: There is air quality information broadcast on France3 (framed conventions). CAMS94_2018SC2 – Minutes Paris (online) workshop Page 20 of 29
Copernicus Atmosphere Monitoring Service
Chat by Hubert Holin: The communication with the national channels is not easy...
3.7 User needs and requirements
To again involve many participants into the work on user requirements, an online whiteboard was
used along follow-up questions – we list in the following tables the issues mentioned and the score if
other participants supported a statement.
Whiteboard task Answer(s) no
Which CAMS product are you Ensemble air quality forecasts 8
working with or imagine to Sentinel-5P air pollution / NO2 6
start working with? Pollen, ragweed 6
Global composition forecast 4
GHG emissions / fluxes 4
CO2, CH4 concentrations, temperature, pressure 2
AOD and optical properties 2
CAMS emission inventories 2
Global air quality forecasts 2
CAMS radiation service / McClear
Air pollution PM, NO2, temperature, UV
pollution or radiation forecasts
Satellite data
Air quality gridded data (on CDS)
PM2.5
ADS
ACT
Forecasts
Sentinel-5P CH4
Aerosol forecasts
Do you need support / Jupyter notebooks (open, transform, visualize the data, 6
training to work with it? applications) + use cases; in Python, Julia, R ... some support if
Please specify which! needed
Docker with everything inside to work on the data (as well
as the notebook)
provide boundary conditions for local models (e.g. 2
WRFchem)
Keep GRib format (30% smaller than netcdf) 2
if netcdf then opendap - functionality would be awesome; 2
NetCDF is perfect (Zarr could benice also)
A detailed description of new parameters as well as a clear
monitoring of the model update would be really useful
think of other coding languages than python such as R
Youtube video and Jupyter notebook
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 21 of 29Copernicus Atmosphere Monitoring Service
Not clear how the humidity is used when managing
aerosols
Documentation on python scripts for converting from
molec/cm² toµg/m3 for NO2
Technical information on data
Methodology for using CAMS output in model assimilation
Tutorial and video on use data / some examples of use
concise PPTs at first, then tutorials
a draw sketch of the overall functionalities of CAMS with all its
tools
Explain limits of CAMS
explanation about pollen emissions
Documentation on L3 datasets and related process at play
Parameters used to compute aerosol optical depth are
usually not clear
Training on the use of CAMS
Script to access hourly global CAMS data
extract info map from PM data
support for PM10 and PM2.5
No
All good
Needs for CAMS from your Global model access via API
application sector or new
applications emerging in 10 days forecast of Global Aerosol Optical Depth, increased
France! spatial resolution
Disseminate local air pollution maps to the general public
and to the media (TV / radio / municipality / etc.)
Improve the CHIMERE model
distribute air pollution data at surface level (0-20m)
More pollen data on the ADS
Pollen global data
pollen global forecasts
a confidence index associated with the forecasts
the same products as for Europe on the DOM TOM domains
(overseas France)
Realtime CO2 (near surface) maps
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 22 of 29Copernicus Atmosphere Monitoring Service
Inclusion of full meteorological forecasts for free worldwide
like NOAA does
Improve the timeliness of Sentinel data
Access to TROPOMI S-5P GHG data (CO, CO2, CH4) for industrial
services (along swath)
Raw level1 and not just assimilated data
Higher vertical resolution in European regional forecasts,
boundary layer height
High resolution anthropogenic emissions to detect
polluting sites
no
Which improvement of More details on aerosol composition, especially organic
existing CAMS products do carbon
you need?
more species for the regional forecasts
the prospect of having access to weather data is exciting
nesting models on main/largest cities in Europe with
increased horizontal resolution
A server providing past re-analyses of models over several
years
hourly data on the global domain
Interest in establishing a correlation with non-European
satellites
Extended time horizon (7/10 days ?) Higher global model
resolution (0.25° ?)
More interactions with us: e.g. webinars, interventions, etc.
Provision of raw Level1 (not just assimilated) data for QA of
forecasts
Addition of NOx to the Greenhouse Gases Flux Inversions
product
1h Time step
reducing the carbon footprint of data storage
I guess "We" (above) = potential CAMS users and these
workshops are great!
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 23 of 29Copernicus Atmosphere Monitoring Service
Downstream services: If a community that wishes to have a map of a pollutant can
Barriers for you to work with call on a private company. What would the cost be?
CAMS? What are your
We develop a new system to provide in-situ measurements
proposals for solutions?
of air quality by remote sensing with a resolution around
25-50 m in areas about 25 km2 . We integrate these new
measurements in a processing chain integrating CAMS data.
Are this kind of measurements interesting for CAMS?
Cost associated with a service?
Web-based standard API (e.g. OpenAPI) to access data and
quicklooks (higher level than current python API)
Lack of UVA and UVB
Involvement of large private sector to use these data on air
quality awareness and to manage them in development. In
other terms business models seems to be main barriers,
contrarily as in other health sectors (vaccine industry, covid
tests business, etc.)
How can we access to that small budget for demonstration
projects ?
An API
the impossibility to access to maps of solar radiation service
Lack of diffused code that we can adapt for our needs
Once again meteorological data IFS
Need of meteorology without delay, at least at an European
scale
all good
Discussion
The whiteboard task raised a number of requirements which are listed in chapter 4.
Comment by Jérôme COLIN: A remark for the "user requirements" session (I will not be able to
attend): it would be very useful in the future to notify the user community of evolutions with
extended deadlines. CESBIO (Toulouse) and CNES are about to use AOT CAMS products for the
atmospheric correction of Sentinel-2 images in operational production (level 2 products distributed
in THEIA). However, the short-term adaptation of the change from 5 to 7 aerosols (July 2019), and
the recent modification of the API (with a notification 2 months in advance) complicates the use of
CAMS products in an already complex processing chain. On a positive note, the use of CAMS
aerosols significantly improves our surface reflectance estimates, so thank you for your work!
CAMS94_2018SC2 – Minutes Paris (online) workshop Page 24 of 29Copernicus Atmosphere Monitoring Service A: Thank you for your feedback. In fact, we are using the same process as for the weather forecast, which allows us to update the system on a regular basis. For some uses, the CAMS reanalysis (done with a frozen version of the model) can be more interesting than the real time / forecasts product. 3.8 Workshop summary, concluding statements Magali Domergue, Isabelle Benezeth and Vincent-Henri Peuch expressed their satisfaction with the workshop and the lively interaction with the participants and concluded the workshop with thanks to all involved organisers and participants. CAMS94_2018SC2 – Minutes Paris (online) workshop Page 25 of 29
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