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Major modification in progress for this article - please DO NOT UPDATE THIS PAGE or your edits will get overwritten when the new modified article will be published. Please edit the working copy of this page in the C3S Modified CKB articles or CAMS Modified CKB articles section."


Acronyms

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Acronym

Description

ADS

Atmosphere Data Store

AOD

Aerosol optical depth

AM

Ammonium

APOLLO

AVHRR Processing scheme Over cLouds, Land and Ocean

APOLLO_NG

APOLLO Next Generation

ASCII

American Standard Code for Information Interchange

BC

Black carbon

BHI

Beam Horizontal Irradiation

BNI

Beam Normal Irradiation

BRDF

Bidirectional reflectance distribution function

CAMS

Copernicus Atmospheric Monitoring Service

CRS

CAMS Radiation Service

CSV

comma/semicolon separated data format

DHI

Diffuse Horizontal Irradiation

DU

Dust

GHI

Global Horizontal Irradiation

Heliosat-4

All-sky method

MACC

Monitoring Atmospheric Composition and Climate

McClear

Cloud-free method

MODIS

Moderate-resolution Imaging Spectroradiometer

MSG

Meteosat Second Generation

netCDF

Network common data format

NI

Nitrate

OR

Organic matter

ISO

International Organization for Standardization

SS

Sea salt

SU

Sulphate

TST

True Solar Time

UT

Universal Time


...

The CAMS Radiation Service is designed to meet the requirements that have been specified for the Copernicus Atmosphere Monitoring Service (CAMS). The precursor projects MACC and MACC-II/-III prepared the CAMS Radiation Service in terms of implementation, sustained operation and availability. It was ensured that the service lines have been designed to best meet both the requirements of downstream service providers and end users at the European, national and local levels, and the requirements of the global scientific user community. This page provides a high level overview of the solar radiation service; more details can be found in the Section Detailed documentation.

Solar radiation service 

The CAMS solar radiation

...

services provide historical values (2004 to present) of global (GHI), direct (BHI) and diffuse (DHI) solar irradiation, as well as direct normal irradiation (BNI). The aim is to fulfil the needs of European and national policy

...

development and the requirements

...

of both commercial and public downstream services

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, e.g. for planning, monitoring, efficiency improvements

...

and the integration of solar energy systems into energy supply grids.

...

For clear-sky conditions, an irradiation time series is provided for any location in the world using information on aerosol, ozone and water vapour from the CAMS global forecasting system.

...

Other properties, such as ground albedo and ground elevation, are also taken into account. Similar time series are available for cloudy conditions but, since the high-resolution cloud information is directly inferred from satellite observations, these are currently only available

...

inside the field-of-view of the Meteosat Second Generation (MSG) satellite, which is roughly Europe, Africa, the Atlantic Ocean and the Middle East.

Input quality control, regular quarterly benchmarking against ground stations, and regular monitoring the consistency and detecting possible trends is performed.

...

All-sky direct (beam) All-sky direct (beam) normal IrradiationAll- diffuse All- global
Main Variable NamesNetCDF UnitsDescription
BHIWh m-2Direct horizontal all sky irradiation, i.e., the direct part of the surface solar downward irradiation integrated over the whole spectrum available at ground level, on a horizontal surface
BNIWh m-2Direct normal all sky irradiation. Part of the radiation that is received from the direction of the sun by a plane facing the sun.
DHIWh m-2Diffuse horizontal all sky irradiation, i.e., the diffuse part of the surface solar downward irradiation integrated over the whole spectrum available at ground level, on a horizontal surface.
GHIWh m-2Global horizontal all sky irradiation, i.e., the surface solar downward irradiation integrated over the whole spectrum available at ground level, on a horizontal surface.
BHIcWh m-2Direct horizontal clear sky irradiation
BNIcWh m-2Direct normal clear sky irradiation.
DHIcWh m-2Diffuse horizontal clear sky irradiation
GHIcWh m-2Global horizontal clear sky irradiation

Expert mode variables

For expert users, all input and output variables are provided in the ‘detailed info expert output mode’. It can only be retrieved when requesting 1 min resolved time series from the Atmosphere Data Store. Besides the standard outputs, it provides:

...

Known issues and version updates

2021060
DateVersionDescription 

2022-

09

v4.

5 (current)

New version of the all-sky model. Version 4.5 uses a new clear sky model (McClear 3.5) and no bias correction anymore.

The clear-sky model McClear 3.5 uses now the CAMS Reanalysis for 2004-2020.

2021-06

v4.0

Since

Since

2013, CAMS Radiation service used the cloud retrieval scheme APOLLO. The version 4.0 of CAMS Radiation Service includes a new version APOLLO Next Generation (APOLLO_NG) that improves cloud detection using fuzzy logic.

Fix in the MSG satellite projection handling for all data before 12/2017.

A new global bias correction was implemented.

2018-06

v3.2

Fix of a mathematical bug in the (latitude, longitude) position of the pixels of the Meteosat satellite images.

2018-03

v3.1

CAMS McClear benefits from the successive enhancements of the Aerosol Optical Depth versions. McClear version, and consequently CAMS radiation service version as well, have been incremented from 3.0 to 3.1. Results are slightly modified in October 2012 and September-November 2015.

2017-10

v3

McClear clear sky model v3
New empirical  bias correction algorithm

2015-10

v2.7

McClear v2.7

2015-07

v2.6

Bug fixed in verbose expert mode

2015-02

v2.6

Bug fixed in the filling of MACC AOD databases

2015-01

v2.6

Bug fixed bug for cloud coverage > 100%
Add a verbose expert mode for the one minute requests
Edition format file version 2

2014-11

v2.5

APOLLO data coverage extension: 2004-02-01 to D-2

2014-11

v2.4

Call to McClear v2.4

2014-08

v2.3

Call to McClear v2.3 Bug fixed in APOLLO data interpolation


v2.2

does not exist (synchronization with McClear versions)

2014-07

v2.1

Bug fixed for the shift of one pixel in APOLLO files import

2013-07

v2.0

Edition format file version 1

...

(3) Cite the relevant peer-review publication for the the CAMS-Radiation Service:

Qu, Z., Oumbe, A., Blanc, P., Espinar, B., Gesell, G., Gschwind, B., Klüser, L., Lefèvre, M., Saboret, L., Schroedter-Homscheidt, M., and Wald L.: Fast radiative transfer parameterisation for assessing the surface solar irradiance: The Heliosat-4 method, Meteorol. Z., 26, 33-57, doi: 10.1127/metz/2016/0781,2017. Available for download at https://www.schweizerbart.de/papers/metz/detail/26/87036/Fast_radiative_transfer_parameterisation_for_asses?af=crossref.

and for the CAMS clear-sky time series:

LefèvreSchroedter-Homscheidt, M., OumbeAzam, AF., BlancBetcke, PJ., EspinarHanrieder, BN., GschwindLefèvre, BM., QuSaboret, ZL., WaldSaint-Drenan, LY., Schroedter-Homscheidt, M.: Surface solar irradiation retrieval from MSG/SEVIRI based on APOLLO Next Generation and HELIOSAT-4 methods, Contrib. Atm. Sci./Meteorol. Z.,2022, doi:10.1127/metz/2022/1132.

and for the CAMS clear-sky time series:

Gschwind, B., Wald L., Blanc, P., Lefèvre, M., Schroedter-Homscheidt, M., Arola, A., 2019. Improving the McClear model estimating the downwelling solar radiation at ground level in cloud free conditions – McClear-V3., Meteorol. Z./Contrib. Atm. Sci., 28, 2, 147-163, doi:10.1127/metz/2019/0946. Available for download at https://www.schweizerbart.de/papers/metz/detail/28/90593/Improving_the_McClear_model_estimating_the_downwelling_solar_radiation_at_ground_level_in_cloud_free_conditions_McClear_v3

Lefèvre, M., Oumbe, A., Blanc, P., Espinar, B., Gschwind, B., Qu, Z., Wald, L., Schroedter-Homscheidt, M., Hoyer-Klick, C., Arola, A., , Hoyer-Klick, C., Arola, A., Benedetti, A., Kaiser, J., W., and Morcrette, J.-J.: McClear: a new model estimating downwelling solar radiation at ground level in clear-sky conditions, Atmos. Meas. Tech., 6, 2403–2418, doi: 10.5194/amt-6-2403-2013, 2013. Available for download at http://www.atmos-meas-tech.net/6/2403/2013/amt-6-2403-2013.pdf

References 

Gschwind, B., Wald L., Blanc, P., Lefèvre, M., Schroedter-Homscheidt, M., Arola, A., 2019. Improving the McClear model estimating the downwelling solar radiation at ground level in cloud free conditions – McClear-V3., Meteorol. Z./Contrib. Atm. Sci., 28, 2, 147-163, doi:10.1127/metz/2019/0946. Available for download at https://www.schweizerbart.de/papers/metz/detail/28/90593/Improving_the_McClear_model_estimating_the_downwelling_solar_radiation_at_ground_level_in_cloud_free_conditions_McClear_v3

References 

QuLefèvre, ZM., Oumbe, A., Blanc, P., Espinar, B., GesellGschwind, GB., GschwindQu, BZ., KlüserWald, L., LefèvreSchroedter-Homscheidt, M., Saboret, L., Schroedter-Homscheidt, M., and Wald L.: Fast radiative transfer parameterisation for assessing the surface solar irradiance: The Heliosat-4 method, Meteorol. Z., 26, 33-57, Hoyer-Klick, C., Arola, A., Benedetti, A., Kaiser, J., W., and Morcrette, J.-J.: McClear: a new model estimating downwelling solar radiation at ground level in clear-sky conditions, Atmos. Meas. Tech., 6, 2403–2418, doi: 10.1127/metz/2016/0781,20175194/amt-6-2403-2013, 2013. Available for download at https http://www.atmos-meas-tech.net/6/2403/2013/amt-6-2403-2013.pdf

Qu, Zschweizerbart.de/papers/metz/detail/26/87036/Fast_radiative_transfer_parameterisation_for_asses?af=crossref.Lefèvre, M., Oumbe, A., Blanc, P., Espinar, B., Gschwind, B., QuBlanc, ZP., WaldEspinar, LB., Schroedter-HomscheidtGesell, MG., Hoyer-KlickGschwind, CB., ArolaKlüser, AL., BenedettiLefèvre, AM., KaiserSaboret, JL., Schroedter-Homscheidt, WM., and Morcrette, J.-J.: McClear: a new model estimating downwelling solar radiation at ground level in clear-sky conditions, Atmos. Meas. Tech., 6, 2403–2418Wald L.: Fast radiative transfer parameterisation for assessing the surface solar irradiance: The Heliosat-4 method, Meteorol. Z., 26, 33-57, doi: 10.5194/amt-6-2403-2013, 20131127/metz/2016/0781,2017. Available for download at httphttps://www.atmos-meas-tech.net/6/2403/2013/amt-6-2403-2013.pdfschweizerbart.de/papers/metz/detail/26/87036/Fast_radiative_transfer_parameterisation_for_asses?af=crossref.

Schroedter-Homscheidt, M., Azam, F., Betcke, J., Hanrieder, N., Lefèvre, M., Saboret, L., Saint-Drenan, Y.-M.: Surface solar irradiation retrieval from MSG/SEVIRI based on APOLLO Next Generation and HELIOSAT-4 methods, Contrib. Atm. Sci./Meteorol. Z.,2022, Gschwind, B., Wald L., Blanc, P., Lefèvre, M., Schroedter-Homscheidt, M., Arola, A., 2019. Improving the McClear model estimating the downwelling solar radiation at ground level in cloud free conditions – McClear-V3., Meteorol. Z./Contrib. Atm. Sci., 28, 2, 147-163, doi:10.1127/metz/2019/0946. Available for download at https://www.schweizerbart.de/papers/metz/detail/28/90593/Improving_the_McClear_model_estimating_the_downwelling_solar_radiation_at_ground_level_in_cloud_free_conditions_McClear_v32022/1132.


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This document has been produced in the context of theCopernicus Atmosphere Monitoring Service (CAMS).

The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of CAMS on behalf of the European Union (Delegation Agreement signed on 11/11/2014 and Contribution Agreement signed on 22/07/2021). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose.

The user users thereof uses use the information at its their sole risk and liability. For the avoidance of all doubtsdoubt , the European Commission and the European Centre for Medium - Range Weather Forecasts has have no liability in respect of this document, which is merely representing the authors author's view.

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