Surface Radiation Fluxes


Downward Surface Shortwave FluxDownward Surface Longwave FluxNet Surface Longwave Flux

Downward Surface Shortwave Flux (DSSF)

The Downward Surface Shortwave Flux (DSSF) refers to the radiative energy in the wavelength interval [0.3 µm, 4.0 µm] reaching the Earth's surface per time and surface unit. It essentially depends on the solar zenith angle, on cloud coverage, and to a lesser extent on atmospheric absorption and surface albedo. DSSF fields are crucial for a wide number of applications involving scientific domains like weather forecast, hydrology, climate, agriculture and environment-related studies. In numerical weather prediction and general circulation models of the atmosphere, satellite-derived DSSF estimates can either be used as a control variable or as a substitute to surface radiation measurement networks.

Available Products:

  • MDSSF: Instantaneous radiative energy in the shortwave domain reaching the surface derived from SEVIRI/MSG (superseded version)
  • MDSSFTD: Instantaneous estimate of the total and the fraction of diffuse radiative energy in the shortwave domain reaching the surface derived from SEVIRI/MSG; demonstration product available for the Indian Ocean Data Coverage (IODC)
  • MDIDSSF: Daily integration of the radiative energy in the shortwave domain reaching the surface derived from SEVIRI/MSG; demonstration product available for the Indian Ocean Data Coverage (IODC)

The use of LSA SAF products in publications is kindly requested to be duly acknowledged:

[product] was provided by the EUMETSAT Satellite Application Facility on Land Surface Analysis (LSA SAF; Trigo et al., 2011)
http://lsa-saf.eumetsat.int

Trigo, I. F., C. C. DaCamara, P. Viterbo, J.-L. Roujean, F. Olesen, C. Barroso, F. Camacho-de Coca, D. Carrer, S. C. Freitas, J. García-Haro, B. Geiger, F. Gellens-Meulenberghs, N. Ghilain, J. Meliá, L. Pessanha, N. Siljamo, and A. Arboleda, 2011: The Satellite Application Facility on Land Surface Analysis. Int. J. Remote Sens., 32, 2725-2744, doi: 10.1080/01431161003743199

Product specific citations:

  • MDSSFTD [LSA-207] / MDIDSSF [LSA-203]:

Carrer, D.; Ceamanos, X.; Moparthy, S.; Vincent, C.; C. Freitas, S.; Trigo, I.F., 2019: Satellite Retrieval of Downwelling Shortwave Surface Flux and Diffuse Fraction under All Sky Conditions in the Framework of the LSA SAF Program (Part 1: Methodology). Remote Sens., 11, 2532. https://doi.org/10.3390/rs11212532

Carrer, D.; Moparthy, S.; Vincent, C.; Ceamanos, X.; C. Freitas, S.; Trigo, I.F., 2019: Satellite Retrieval of Downwelling Shortwave Surface Flux and Diffuse Fraction under All Sky Conditions in the Framework of the LSA SAF Program (Part 2: Evaluation). Remote Sens., 11, 2630. https://doi.org/10.3390/rs11222630

  • MDSSF [LSA-201]:

Geiger, B., Meurey, C., Lajas, D., Franchistéguy, L., Carrer, D., and Roujean, J.-L., 2008: Near real-time provision of downwelling shortwave radiation estimates derived from satellite observations, Meteorol. Appl., 15, 411-420

Available data formats:

  • Geostationary/sinusoidal grid in HDF5
  • Regular grid in NETCDF4

Data Server information:

 

Register here to access the LSA-SAF Data Server

When available, the Data Record (DR) datasets replace the corresponding Near Real Time (NRT) data in the Data Server for the overlapping period. The DR ensures continuous times series since it is produce with the most recent algorithm version. To obtain NRT data for the DR period plase contact the Help Desk.

  Product Sensor/
Platform
Spatial
coverage
Spatial
resolution
Temporal
Coverage
Temporal
resolution
Documentation Data access
LSASAF_MSG_MDSSFTD_MSG-Disk.png

MSG Total and
Diffuse DSSF

MDSSFTD [LSA-207]

Operational

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o

2004-NRT

15 min

Access Here

Data Server

LSASAF_MSG_DSSF_MSG-Disk.png

MSG DSSF
MDSSF [LSA-201]

Superseded (LSA-207)

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2016-2020 30 min Access Here Help Desk
LSASAF_MSG_DSSF_MSG-Disk.png

MSG DSSF
Data Record

MDSSF

Superseded (LSA-207)

SEVIRI/
MSG

 
Europe, Africa,
South America
3 km
0.05ox0.05o
2004-2015 30 min Access Here
LSASAF_MSG-IODC_MDSSFTD_IODC-Disk.png

MSG-IODC Total
and Diffuse DSSF

MDSSFTD

Demonstration

SEVIRI/
MSG
Europe, Africa,
Middle East
3 km
0.05ox0.05o
2017-NRT 15 min Access Here

Data Server

LSASAF_MSG_DIDSSF_MSG-Disk.png

MSG Daily DSSF
MDIDSSF [LSA-203]

Operational

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2004-NRT daily

Access Here

Data Server

LSASAF_MSG-IODC_DIDSSF_IODC-Disk.png

MSG-IODC Daily
DSSF

MDIDSSF

Demonstration

SEVIRI/
MSG
Europe, Africa,
Middle East
3 km
0.05ox0.05o
2017-NRT daily

Access Here

Data Server

 

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Downward Surface Longwave Flux (DSLF)

Downward Surface Longwave Flux (DSLF) is the result of atmospheric absorption, emission and scattering within the entire atmospheric column and may be defined as the thermal irradiance reaching the surface in the thermal infrared spectrum (4-100 µm). In clear sky situations DSLF depends on the vertical profiles of temperature and gaseous absorbers (primarily the water-vapour followed by CO2, and others of smaller importance like O3, CH4, N2O and CFCs). However, DSLF is determined by the radiation that originates from a shallow layer close to the surface (about one third being emitted by the lowest 10 meters and 80% by the 500-meter layer). The cloud contribution mainly occurs in the atmospheric window (8-13 µm) and mainly depends on cloud base properties (height, temperature and emissivity).

Available Products:

  • MDSLF: Instantaneous radiative energy in the longwave domain reaching the surface derived from SEVIRI/MSG; demonstration product available for the Indian Ocean Data Coverage (IODC)
  • MDIDSLF: Daily integration of the radiative energy in the longwave domain reaching the surface derived from SEVIRI/MSG; demonstration product available for the Indian Ocean Data Coverage (IODC)

 

The use of LSA SAF products in publications is kindly requested to be duly acknowledged:

[product] was provided by the EUMETSAT Satellite Application Facility on Land Surface Analysis (LSA SAF; Trigo et al., 2011)
http://lsa-saf.eumetsat.int

Trigo, I. F., C. C. DaCamara, P. Viterbo, J.-L. Roujean, F. Olesen, C. Barroso, F. Camacho-de Coca, D. Carrer, S. C. Freitas, J. García-Haro, B. Geiger, F. Gellens-Meulenberghs, N. Ghilain, J. Meliá, L. Pessanha, N. Siljamo, and A. Arboleda, 2011: The Satellite Application Facility on Land Surface Analysis. Int. J. Remote Sens., 32, 2725-2744, doi: 10.1080/01431161003743199

Available data formats:

  • Geostationary/sinusoidal grid in HDF5
  • Regular grid in NETCDF4

Data Server information:

Register here to access the LSA-SAF Data Server

When available, the Data Record (DR) datasets replace the corresponding Near Real Time (NRT) data in the Data Server for the overlapping period. The DR ensures continuous times series since it is produce with the most recent algorithm version. To obtain NRT data for the DR period plase contact the Help Desk.

  Product Sensor/
Platform
Spatial
coverage
Spatial
resolution
Temporal
Coverage
Temporal
resolution
Documentation Data access
LSASAF_MSG_DSLF_MSG-Disk.png

MSG DSLF
MDSLF [LSA-204]

Operational

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2016-NRT 30 min Access Here

Data Server

LSASAF_MSG_DSLF_MSG-Disk.png

MSG DSLF
Data Record

MDSLF

Demonstration

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2004-2015 30 min

Access Here

LSASAF_MSG-IODC_DSLF_IODC-Disk.png

MSG-IODC
DSLF

MDSLF

Demonstration

SEVIRI/
MSG
Europe, Africa,
Middle East
3 km
0.05ox0.05o
2017-NRT 30 min Access Here Data Server
LSASAF_MSG_DIDSLF_MSG-Disk.png

MSG Daily
DSLF

MDIDSLF [LSA-206]

Operational

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2016-NRT daily Access Here Data Server
LSASAF_MSG_DIDSLF_MSG-Disk.png

MSG Daily DSLF
Data Record

MDIDSLF

Demonstration

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2004-2015 daily Access Here
LSASAF_MSG-IODC_DIDSLF_IODC-Disk.png

MSG-IODC
Daily DSLF

MDIDSLF

Demonstration

SEVIRI/
MSG
Europe, Africa,
Middle East
3 km
0.05ox0.05o
2017-NRT daily Access Here Data Server

 

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Net Surface Longwave Flux (NSLF)

The Net Surface Longwave Flux (DSLF) drives the processes of evaporation, photosynthesis, and heating of soil and air. Radiative processes in the Earth-atmosphere system are essential for maintenance of the atmospheric general circulation. Knowledge of the radiation budgets at the surface and top of atmosphere allows the determination of the radiative forcing of the atmosphere as well as the radiative heating of the surface. Furthermore, the surface net radiation plays a major role in the surface energy balance, which in turn controls near surface temperature and drives several of the biological and physical processes on Earth. The net longwave (NSLF) product is estimated from the downwelling longwave surface flux product (DSLF) and the all-weather LST (LST-AS), which is the main contributor to the upwelling longwave flux.

 

Available Products:

  • MNSLF: Daily net energy at the surface in the longwave domain derived from SEVIRI/MSG;

 

The use of LSA SAF products in publications is kindly requested to be duly acknowledged:

[product] was provided by the EUMETSAT Satellite Application Facility on Land Surface Analysis (LSA SAF; Trigo et al., 2011)
http://lsa-saf.eumetsat.int

Trigo, I. F., C. C. DaCamara, P. Viterbo, J.-L. Roujean, F. Olesen, C. Barroso, F. Camacho-de Coca, D. Carrer, S. C. Freitas, J. García-Haro, B. Geiger, F. Gellens-Meulenberghs, N. Ghilain, J. Meliá, L. Pessanha, N. Siljamo, and A. Arboleda, 2011: The Satellite Application Facility on Land Surface Analysis. Int. J. Remote Sens., 32, 2725-2744, doi: 10.1080/01431161003743199

Available data formats:

  • Geostationary/sinusoidal grid in HDF5
  • Regular grid in NETCDF4

Data Server information:

Register here to access the LSA-SAF Data Server

  

  Product Sensor/
Platform
Spatial
coverage
Spatial
resolution
Temporal
Coverage
Temporal
resolution
Documentation Data access
LSASAF_MSG_MNSLF_MSG-Disk.png

MSG NSLF
MNSLF [LSA-208]

Operational

SEVIRI/
MSG
Europe, Africa,
South America
3 km
0.05ox0.05o
2020-NRT daily Access Here

Data Server

 

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