© Bern, 210913 Anke Tetzlaff 1

Federal Department of Home Affairs FDHAFederal Office of Meteorology and Climatology MeteoSwiss

Satellite-based radiation and its applicationAnke Duguay-Tetzlaff, MeteoSwiss

© Bern, 210913 Anke Tetzlaff 2

Climate Monitoring SAF

Satellite-derived products and services for climate monitoring.

www.cmsaf.eu

© Bern, 210913 Anke Tetzlaff 3

Joint retrieval of all surface radiation components to ensure consistency in terms of:

• boundary conditions• cloud forcing• retrieval algorithms• calibration• radiometric transfer

1983-2020 CDR to be released

Meteosat Surface Radiation Budget

© Bern, 210913 Anke Tetzlaff 4

Meteosat Calibration

© Bern, 210913 Anke Tetzlaff 5

Meteosat Calibration

© Bern, 210913 Anke Tetzlaff 6

Surface Outgoing Longwave Radiation

@ UK Met Office Hadley Centre

Highly consistent! • Anomaly space• Night-time

Satellite

© Bern, 210913 Anke Tetzlaff 7

Surface Incoming Solar Radiation

© Bern, 210913 Anke Tetzlaff 8

Accuracy of CM SAF surface radiationAccuracy*

SIS 5 W/m2

Albedo 10 %SDL 11 W/m2

SOL 10 W/m2

* Monthly mean

© Bern, 210913 Anke Tetzlaff 9

Applications for Swiss Climate Services

© Bern, 210913 Anke Tetzlaff 10

WMO New Climate Normals 1991-2020

CM SAF Meteosat Climate Data Records cover new WMO Climatological Normal

Climate Normals serve as a ruler to compare today’s weather and as a predictor of conditions in the near future. Benchmark to provide context to recent climate conditions.

© Bern, 210913 Anke Tetzlaff 11

Solar Incoming Surface Radiation2018

© Bern, 210913 Anke Tetzlaff 12

Solar Energy«Sonnendach»

https://www.uvek-gis.admin.ch/BFE/sonnendach/@BFE, MeteoSwiss

© Bern, 210913 Anke Tetzlaff 13

Climate modelling of heat stress

T, humidity und wind from ground stations

CM SAF global radiation

@ Christoph Spirig, Ana Casanueva MeteoSwissH2020 HeatShield

Bias Correction

© Bern, 210913 Anke Tetzlaff 14

CM SAF Evapotranspiration vs. Lysiometer

Comparison CM SAF Evapotranspiration with ground data (anomaly, 2005 to 2016) @ ETH, Dominik Michel

© Bern, 210913 Anke Tetzlaff 15

Conclusions

• Strong progress on satellite data calibration the last years

• Improved temporal stability and precision for satellite-based surface radiation data

• Meteosat satellite CDRs cover the new WMO Climatological Normal 1991-2020

• Satellite-based radiation data are integrated in Swiss climate services

© Bern, 210913 Anke Tetzlaff 16

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Federal Department of Home Affairs FDHAFederal Office of Meteorology and Climatology MeteoSwiss