CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2

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CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
CAMS Atelier virtuel pour
                          les utilisateurs (France)

                        Séance 1-2 (10:00 – 10:55)
                        CAMS product portfolio, updates / radiation and CO2
Atmosphere Monitoring
                        Chair: V.-H. Peuch (ECMWF)

                        Co-Chair: M. Domergue (Ministry for the Ecological Transition)
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
Mise à jour du portefeuille produits CAMS

                        Stijn Vermoote, ECMWF

                        Acknowledgements:
                        V.-H. Peuch, R. Engelen and other colleagues and service providers
                        of CAMS team
Atmosphere Monitoring
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
C A M S I N F O R M AT I O N F L O W
Atmosphere
Monitoring
                                                                        CAMS users

                                                   40km Globe
                                                   (twice daily, d+5)
                                CAMS main operational data
                                assimilation and modelling systems
       Earth Observation
       from satellite (>75
       instruments) and in-
       situ (regulatory and
       research)

                                10km Europe
                                (daily, d+4)
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
http://atmosphere.copernicus.eu
Atmosphere
Monitoring                                     CAMS provides operational
                                               information products based on
                                               Earth Observation about:
                                               •    past, current and near-
                                                    future (forecasts) global
                                                    atmospheric
                                                    composition;
                                               •    the ozone layer;
                                               •    European air quality;
                                               •    emissions and surface
                                                    fluxes of key pollutants
                                                    and greenhouse gases;
                                               •    solar radiation;
                                               •    climate radiative forcing.
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
PRODUCTS: Past global atmospheric composition
Atmosphere                                    The CAMS global reanalysis covers the period 2003 to end 2019. It is a marked improvement over our previous datasets
Monitoring                                    (MACC reanalysis and CAMS interim reanalysis).
                                               CAMSRA (2003-2016)
                                                                                                  Evaluation of total column CO

                                                                                                                     bias      4.49 ± 5.04    2.99 ± 3.02    -0.54 ± 2.95
        Evaluation of Aerosol Optical Depth

                                               CIRA (2003-2016)

                                                                                                          bias   4.55 ± 4.50        7.30 ± 4.42      1.96 ± 5.06
                                               MACCRA (2003-2012)
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
PRODUCTS: Ozone layer
Atmosphere
Monitoring
                                     The anomalous 2019 ozone hole
                                     has closed. It has been the smallest
                                     since the early 80s. This possibility
                                     was mentioned by CAMS to the
                                     press in mid-September already.
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
PRODUCTS: Emissions inventories
Atmosphere
Monitoring

        Emissions are both an input to CAMS global and regional systems and a popular product.
        Entirely new datasets have been released covering 2003 to 2020 (extrapolation).
        Example: CO2 emissions from shipping activities.
        (lead provider: TNO, NL)
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
P R O D U C T S : D A I LY A N A LY S E S A N D F O R E C A S T
Atmosphere
Monitoring                                                         • Over Europe, a multi-model ensemble
                                                                     is used to deliver forecasts (with
                                                                     uncertainty).
                                                                   • It has now 9 operational members
                                                                     (CHIMERE, DEHM, EMEP, EURAD,
                                                                     GEM-AQ, LOTOS-EUROS, MATCH,
                                                                     MOCAGE, SILAM) and 2 more are
                                                                     ramping up (MONARCH, MINNI).
                                                                   • Effectively, the “Premier League” for
                                                                     air quality models in Europe,
                                                                     leveraging on national efforts and
                                                                     expertise in 10 EU Member States.
                                                                   • 10km by design.
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
PRODUCTS FOR POLICY USERS
Atmosphere
Monitoring

             Annual Air Quality (interim)
             assessment reports, includes
             analysis of key episodes and effect      Air Control Toolbox (ACT)
             of natural contributions for             Co-designed with EU Member States
             supporting reporting activities in MS.   and operated using one of the
                                                      ensemble members (CHIMERE, Ineris,
                                                      FR)
                                                                                           For major European cities
                                                                                           Daily analysis of local versus large scale
                                                                                           contribution to air pollutant concentrations.
             http://policy.atmosphere.copernicus.eu
CAMS Atelier virtuel pour les utilisateurs (France) - Séance 1-2 (10:00 - 10:55) CAMS product portfolio, updates / radiation and CO2
Supplementary products
Atmosphere
Monitoring

             Greenhouse gas fluxes (CO2, CH4, N2O)   Climate forcings

                                                                        Solar
                                                                        radiation
D O C U M E N TAT I O N & Q U A L I T Y C O N T R O L
Atmosphere
Monitoring                                                           Ozone free
                                                                     troposphere
                                                                     2013-2018

        CAMS provides detailed information about how its products
        are produced and what the quality is.
CAMS:

a mainstream information source on air       Copernicus EU
quality

free and open source of big data for local   Copernicus ECMWF
applications

                                             @CopernicusEU
                                             @CopernicusECMWF
                                             @VHPeuch

                                             @copernicusecmwf

 Atmosphere Monitoring                       Copernicus EU
                                             Copernicus ECMWF

                                             www.copernicus.eu
                                             atmosphere.copernicus.eu
Plans and expectations for the
                        new CAMS CO2 service

Atmosphere Monitoring   Richard Engelen
                        Deputy Director of CAMS
                        Project Coordinator of CoCO2
Some context
Atmosphere   The 2019 Refinement to the 2006 IPCC Guidelines for National
Monitoring
             Greenhouse Gas Inventories acknowledged the
             complementary capability offered by the monitoring of
             greenhouse gas emissions through in situ and satellite
             observations.

             The European Green Deal plans to make the EU's economy
             sustainable. This can be done by turning climate and
             environmental challenges into opportunities and making the
             transition just and inclusive for all.

             Ursula von der Leyen: “You should explore ways in which we
             can make the most of our assets to deliver on climate
             objectives, including the use of Copernicus to monitor CO2
             emissions.“
UNFCCC- National Inventory Reports
Atmosphere
Monitoring

             Total emissions by pollutant, sector, country and year are reported to the UNFCCC following strict
             IPCC guidelines. These guidelines have been agreed internationally at high political level.

                                                                                                                  3
Is this information sufficient for monitoring our climate goals?
Atmosphere
Monitoring
             The nationally reported emissions are:
             • based on internationally agreed guidelines
             • accurate, especially for Annex I countries
             • split out by sector

             But:
             • lag in time (~2 years)
             • have no detailed spatial information
             • have no detailed temporal information

             To achieve a more detailed and timely
             monitoring of emissions in support of climate
             mitigation actions, we need additional
             information.

                                                                                4
Current advances - gridded emission data & use of timely information
Atmosphere
Monitoring                                                       There is more detailed emission information
                                                                 available, both in space and time, which can be
                                                                 used to provide gridded maps. However,
                                                                 individual countries use different
                                                                 methodologies, which results in globally
                                                                 inconsistent maps.

             Much effort goes into harmonizing
             these grid maps by, for instance, the
             Joint Research Centre (JRC) and the
             Copernicus Atmosphere Monitoring
                                                                                                  CAMS - BSC
             Service.
                                                                              2020

                                                                                                            5
Difficult sectors - Agriculture, Forestry, and Land Use (AFOLU)
Atmosphere
Monitoring

                                                                          While uncertainties in national
                                                                          reported fossil fuel emissions tend
                                                                          to be small, certainly within Europe,
                                                                          this is not the case for other sectors.

                                                                          Emissions from the AFOLU sector
                                                                          are much harder to estimate, but
                                                                          account for about 25% of the total
                                                                          greenhouse gas emissions.

                                                                          They also provide good options for
                                                                          mitigation and are therefore
                                                                          important to monitor.

                                                                                                                    6
Challenges of observation-based emission monitoring
Atmosphere                      Satellites do not measure emissions directly; they measure the impact
Monitoring
                                of emissions on the atmosphere.

                                Satellites see only the total impact of anthropogenic and natural effects.

                                                                                 Earth System models are used to
                                                                                   translate the observations into
                                                                                               emission estimates.
Proposed Copernicus Monitoring & Verification Support capacity
Atmosphere
Monitoring
                                                                 The added value of the CO2MVS will not be
                                                                 in the replacement of the current national
                                                                 annual-mean emission estimates reported
                                                                 to the UNFCCC, but in providing more
                                                                 detailed and more timely information in
                                                                 support of climate mitigation and adaptation
                                                                 actions.

                                                                 Combining information from a multitude of
                                                                 sources will deliver relevant emission data in
                                                                 a much more timely, detailed and consistent
                                                                 way than is currently available through the
                                                                 national reporting.
User engagement – co-design of service portfolio
Atmosphere
Monitoring                                      Supporting countries
                      UNFCCC
                                                depending on their
               Official         reporting
                                                needs.

                       National                 Priors
                                                                        Copernicus
                      inventory
                                                                      CO2MVS capacity
                       agencies

                                                         Synergetic
                                 National                exchange
                               observation-
                             based monitoring

                          Observation-based added-value information

                                                                              Working with users to understand their requirements and
                                                                              together build the added value of the CO2MVS.
Roadmap
Atmosphere
Monitoring
                  CO2 Monitoring Task Force
                                                                      Launch of the CO2
                                                                                                                2nd global
                                                                          Sentinel
                                                                                                                stocktake
                                                                        constellation
                                                1st global
                                                stocktake

                       2018        2020           2022                 2024               2026            2028

     2015
                                              Prototyping activities including
                                                                                                   Copernicus service in full
                                              relevant CO2 satellite missions
                  MRD                                                                            operations using CO2 Sentinels
                                                 from international space
                                                                                                   and international virtual
                                                         agencies
                                                                                                         constellation

                   R&D Support Actions
Examples of where we are today
Atmosphere
Monitoring                                                                       Fluxes of carbon dioxide from managed
                                                                                 ecosystems estimated by national
                                                                                 inventories compared to atmospheric
                                                                                 inverse modelling
                                                                                 UNFCCC
                                                                                 In-situ based estimates
                                                                                 Satellite based estimates

             Frédéric Chevallier, LCSE

                          Comparing Sentinel-5p satellite
                          observations with model simulated
                          observations to detect methane hotspots.
                                                                     Jérôme Barré, ECMWF
CONCLUSIONS
Atmosphere
Monitoring
              • Plan is to ramp-up the anthropogenic CO2 emissions monitoring & verification
                support capacity (CO2MVS) in CAMS to be operational in 2026

              • Aim of the CO2MVS capacity is to support the European Commission and EU
                member states with monitoring the anthropogenic impact on atmospheric
                CO2 concentrations

              • The exact product portfolio will be co-designed with member states and other
                user communities

              • The service provision and its continual development will be distributed over
                European partners as is already the case for CAMS and C3S
Tour du magasin des produits de CAMS
                   (ADS) et Outils d'assitance aux utilisateurs

                                                    Anabelle Guillory
                                                       User Services
                                                             ECMWF
Atmosphere Monitoring
                                            Remerciements: Miha Razinger
TOUR   de   l ’A D S
Atmosphere
Monitoring

                                       Qu’est ce que l’ADS?

                                     L’ADS en quelques chiffres

                                    Que trouve-t-on dans l’ADS?

                         Comment accéder et télécharger les données?
https://ads.atmosphere.copernicus.eu
Atmosphere
Monitoring

                                                    L'Atmosphere
                                                    Data Store (ADS)
                                                    remplace le
                                                    catalogue de
                                                    produits CAMS
                                                    comme point
                                                    principal d'accès
                                                    à toutes les
                                                    données CAMS
                                                    (guichet
                                                    unique!)
L e s r o u a g e s d e l ’A D S
Atmosphere
Monitoring   L'ADS est un système de données et d'informations,
             modulaire et distribué qui donne accès à tous les
             ensembles de données CAMS via des interfaces Web
             et API unifiées. Plus tard, l’ADS offrira aussi des
             capacités de traitement de données en ligne (toolbox).
construit sur le succès de la grande soeur: la CDS
Atmosphere
Monitoring

https://cds.climate.copernicus.eu
L’A D S   en   quelques         nombres
Atmosphere
Monitoring

                   • ADS lancé en juin 2020
                   • 11 ensembles de données publiés, 2 autres sont presque prêts
                   • volume total de données publiées ~ 1,5 PB, avec 120 TB de disques, le
                     reste sur bandes
                   • plus de 5600 utilisateurs enregistrés dans 148 pays
                   • 150 utilisateurs actifs/jour
                   • ~25 000 requêtes/jour
                   • en moyenne 1,5 TB de données par jour
Catalogue   de   produits   disponibles
Atmosphere
Monitoring
Ensembles     de    données         à   venir
Atmosphere
Monitoring

                  • Réanalyses européennes de la qualité de l’air (European air
                    quality reanalyses)

                  • Inventaires européens des émissions (European emission
                    inventories)

                  • Émissions de feux de biomasse (Fire emissions)
Comment          accéder           aux      données?
Atmosphere
Monitoring

              1 Inscription (unique, immédiate et gratuite)   2 Chercher dans le catalogue
Comment         accéder          aux     données?
Atmosphere
Monitoring

      3 Remplir le formulaire de téléchargement en ligne
Comment         accéder          aux     données?
Atmosphere
Monitoring

      3 Remplir le formulaire de téléchargement en ligne
Comment         accéder          aux     données?
Atmosphere
Monitoring

      3 Remplir le formulaire de téléchargement en ligne
Comment         accéder          aux     données?
Atmosphere
Monitoring

      3 Remplir le formulaire de téléchargement en ligne   4 Télécharger les données pour les utiliser
Parcours                   d'assistance                                  aux             utilisateurs
Atmosphere
Monitoring                             https://atmosphere.copernicus.eu/help-and-support

                                            Copernicus Knowledge Base
                                            (CKB), un ensemble de documents
                                            et de lignes directrices dont la
                                            qualité est contrôlée, revus et        Copernicus User Forum, une plate-
                                            vérifiés par des experts, mis à jour   forme permettant aux utilisateurs
                                            régulièrement.                         du CAMS de partager et
                                                                                   d'apprendre de l'expérience
                                                                                                                         Secure Enquiry Web Portal,
                                                                                   d'autres utilisateurs et experts.
                                                                                                                         Permettant aux utilisateurs du
                                                                                   Également l'endroit pour surveiller
                                                                                                                         CAMS de soulever toute question
                                                                                   les dernières annonces de CAMS.
                                                                                                                         restée sans réponse, d'envoyer
                                                                                                                         des commentaires, des besoins et
                                                                                                                         de surveiller le statut de leur
     https://ads.atmosphere.copernicus.eu
                                                                                                                         demande : support.ecmwf.int
Parcours   d’assistance   aux   utilisateurs   ADS
Atmosphere
Monitoring
‘Watch’   CAMS   FORUM   Announcements
Atmosphere
Monitoring
En   résumé
Atmosphere
Monitoring
                                L’ADS, c’est simple comme Bonjour!

                     Et les données sont librement accessibles et réutilisables

                     https://ads.atmosphere.copernicus.eu

                     N’hésitez pas à utiliser les outils d’assistance (CKB, Forum)

                     Pensez que nous sommes à votre écoute pour vous aider

                                       Et tout ça, c’est gratuit!
Solar Radiation service update –
                        New algorithms APNG, SEVIRI,
                        Himawari, GOES & future ideas
                        M. Schroedter-Homscheidt, F. Azam, J. Betcke
                        (DLR - Institute of Networked Energy Systems)
Atmosphere Monitoring   N. Hanrieder, S. Wilbert (DLR – Institute for Solar Research)
                        L. Saboret, E. Wey (Transvalor)
                        M. Lefèvre, Y.-M. Saint-Drenan (Armines/Mines ParisTech)
                        A. Arola, M. Pittkänen (FMI)
The   CAMS          radiation                  service           principle
Atmosphere
Monitoring

                                                               Heliosat-4
                                                  clouds     and McClear
                                                    from        physical
                                                             approaches,
                                                satellite
                                                             fast radiative
                                                                transfer
                      © EUMETSAT/DLR

                                                                                                          irradiance,
                                                                                              cloud free irradiance

                                                                                                       method papers
                                                                                     Qu et al., Contrib. Atm. Phys., 2017
                                                                                   Lefèvre et al., Atm. Meas. Tech., 2013
                                                                               Gschwind et al., Contrib. Atm. Phys., 2019

                                       © MEEO
W h a t    i s   t h e   t e m p o r a l      a n d      s p a t i a l     r e s o l u t i o n ?
Atmosphere
Monitoring    Not easy to answer                    Variable         Data          Temporal        Spatial resolution
                                                                     sources      resolution
              as input data has                Aerosols properties   CAMS            3h          0.8° until 20 June 2016,
              various temporal and             and type                                          0.4° since 21 June 2016
                                               Cloud properties      APOLLO           15 min            3 to 10 km
              spatial resolutions.             and type              (DLR)
                                               Total column          CAMS              3h        0.8° until 20 June 2016,
                                               content in ozone                                  0.4° since 21 June 2016
              And solar geometry               Total column water    CAMS              3h        0.8° until 20 June 2016,
              requires 1 min steps.            vapour content                                    0.4° since 21 June 2016
                                               Ground albedo         MODIS      Climatology of             6 km
                                                                     (MPT)      monthly values
              Two answers:
              a) Use the on-the-fly time series access at the user‘s location of interest.
                 The CAMS Radiation Services does all interpolation steps for you.

              b) Agree on a gridded data set with one realisation of many possible
                 temporal and spatial resolutions.
Time         series               on -the-fly                    and   gridded        data
Atmosphere
Monitoring
                 On-the-fly time series processing via                                      gridded data
                 CAMS ADS or the CRS portal
                                                                                        •     15 min temporal resolution
             •    global, diffuse, direct and direct normal irradiation
                                                                                        •     2005-2020
             •    time series 2004 onwards
                                                                                        •     0.2° gridded data
                  1 min, 15 min, 1 hour, 1 day, 1 month temporal resolution
             •    any point within satellite field of view
             •    interactive and OGC script access possible
             •    transparent access to all input data used if 1 min is selected
Extended          routine         validation
Atmosphere
Monitoring

             Evolution of the
             number of stations
             used for each product
             2014 onwards

             New activities:
                 • chapter on station data where we observe quality issues
                 • chapter on station instrumentation used
                 • multi-annual cycle comparisons for each quarter
                 • station-wise detailed validation reports as annex
Method         updates
Atmosphere
Monitoring
             • using C47R1 aerosols and replacing C46R1 period by new aerosols
             • SEVIRI calibration update following Meirink et al. (KNMI)
             • extension of COT LUTs instead of clipping at 0.5
             • probabilistic cloud threshold in cloud masks,
               1% cloud probability as a very strict selection
               best optimum to fulfill solar energy user needs
             • Radiative transfer models: point source,
               no circum solar radiation,
               will generate negative bias
               against ground observations
                 • User standard: WMO CIMO Guide (2008): …(half-angle 2.5 deg)”
                 • This we should fulfill…
How           do         make    results                   fit       to      pyrheliometes ?
  Atmosphere   All cases including clear sky   All cloudy cases
  Monitoring
                                                                                       Thin ice cloud cases               Thin ice cloud cases +
                                                                                                                           adding circumsolar
   DIR
 60 min
 SAT vs.
ground,
Cabauw,
  2015

                                                                                              cloud modification factor
                                                                                              e.g. Shiaobara & Asano (1994), Kinne et al. (1997)

                                                                  empirically derived:
                                                                  optimum apparent COT modification factor
                                                                  for optically thin, non-cirrus clouds
Evaluation                results     –   MSG-SEVIRI
Atmosphere                                                                           15
Monitoring

                                                       GHI relative bias error [%]
                                                                                     10
      Study design:
                                                                                      5
      hourly evaluation; all days of 2015
                                                                                      0
      CAMS operational (incl. bias correction, V3.2)

                                                                                                                                                ADR

                                                                                                                                                                            JOR

                                                                                                                                                                                         OUJ

                                                                                                                                                                                                     TN
                                                                                                                                                                                                          ZAG
                                                                                                                                      PAL
                                                                                                                          GOB

                                                                                                                                                                     GHA

                                                                                                                                                                                   MIS

                                                                                                                                                                                               TAN
                                                                                                CAB
                                                                                                       CAM
                                                                                                              CAR

                                                                                                                                LIN
                                                                                                                    CNR

                                                                                                                                                       CAI
                                                                                                                                                              ERF
      vs.                                                                             -5

      APOLLO_NG/Heliosat-4(DLR),                                                     -10

      no bias correction applied                                                     -15               CAMS, biascorr               APOLLO_NG/H4(DLR), no biascorr

      Experimental version as basis for
      CAMS Radiation Service v4.0                                                          25

                                                       GHI relative RMSE [%]
      Thanks to BSRN & EnerMENA station teams                                              20
      for providing their data.
                                                                                           15

                                                                                           10

                                                                                           5

                                                                                           0

                                                                                                                                                                                                     TN
                                                                                                                                                 ADR

                                                                                                                                                                             JOR

                                                                                                                                                                                         OUJ

                                                                                                                                                                                                          ZAG
                                                                                                                              GOB

                                                                                                                                          PAL

                                                                                                                                                                                               TAN
                                                                                                                                                                      GHA

                                                                                                                                                                                   MIS
                                                                                                      CAB

                                                                                                                                                               ERF
                                                                                                            CAM
                                                                                                                  CAR
                                                                                                                        CNR

                                                                                                                                                        CAI
                                                                                                                                    LIN
                                                                                                  CAMS, biascorr                      APOLLO_NG/H4(DLR), no biascorr
Worldwide   validation   of    new        scheme
Atmosphere
Monitoring                                 MSG-like or improved satellites
                                           now available
                                           25.1.2018, 1200 UTC
Evaluation                   results               –     Himawari-8
Atmosphere
Monitoring
              Study design:
              hourly evaluation; 6 days/month – each 5/10/15/20/25/30 of each month in 2018
              APOLLO_NG/Heliosat-4(DLR), no bias correction applied

              Hourly GHI and DIR validation for HIMAWARI -8 for the year 2018 - outliers COC and LEA are mixed pixels at the coastline.
                                      Station LEA does not provide enough DIR observations and is excluded.
Evaluation                 results               –     GOES-16
Atmosphere
Monitoring
             Study design:
             hourly evaluation; 6 days/month – each 5/10/15/20/25/30 of each month in 2018
             APOLLO_NG/Heliosat-4(DLR), no bias correction applied

                  Hourly GHI and DIR validation for GOES-16 for the year 2018 – long snowy season increases all metrics
                       in BON, BOS, FPE, SXF in 2018; DRA affected by parallax effects in broken cloud conditions
Conclusions
Atmosphere
Monitoring   The CAMS Radiation Service provides solar irradiation
                  •   at the point of interest
                  •   as a time series in the requested temporal resolution
                  •   easy access as the spatio-temporal interpolation challenge is solved for the user
                  •   one gridded dataset available as well – ADS integration will provide more options for users
                  •   traceable data generation, open information on quality control
                  •   lot‘s of details available in validation reports and User Guide

             •   A new CAMS Radiation Service V4 will be released soon.
                  •   using C47R1 aerosols and replacing C46R1 period by new aerosols
                  •   update in SEVIRI calibration
                  •   probabilistic cloud masks of APOLLO_NG
                  •   no COD clipping for small values anymore
                  •   direct irradiance will fit better to pyheliometer observations

             •   Preparations for Himawari-8 and GOES were done with very nice validation results.
Contact           point          &    references
Atmosphere
Monitoring
              •   general inquiries and user requests: copernicus-support@ecmwf.int

              •   specific for the Solar Radiation Service team:
                  marion.schroedter-homscheidt@dlr.de

              •   User‘s Guide at http://atmosphere.copernicus.eu/documentation
              •   Heliosat-4 method: Qu et al., Fast radiative transfer parameterisation for assessing the surface solar
                  irradiance: The Heliosat-4 method, MetZet, 2017
              •   McClear method: Lefèvre et al., McClear: a new model estimating downwelling solar radiation at
                  ground level in clear-sky conditions, AMT, 2013 & Gschwind et al., Improving the McClear model
                  estimating the downwelling solar radiation at ground level in cloud-free conditions – McClear-v3,
                  Contrib. Atm. Phys./Meteorol. Z., 2019
              •   UV and broadband irradiation evaluation: Quarterly validation reports at
                  https://atmosphere.copernicus.eu/supplementary-services
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