April 2013 1

Jörg Trentmann, Uwe Pfeifroth,

Jennifer Lenhardt, Richard Müller

Deutscher Wetterdienst (DWD)

Satellite-based Data

Sets for EURO4M

April 2013 2

Satellite-based data sets to be generated and

delivered within EURO4M

• Surface Solar Radiation

• Cloud Fraction

• Surface Albedo

• Precipitation

• Integrated Water Vapor

All data sets are provided as monthly means in netcdf-format for the European Domain:20W – 40E, 30N – 75N

April 2013 3

Surface Solar Radiation

a) Global Radiation (Irradiance)

• Based on Meteosat• 1983 – 2010• 0.05 deg spatial resolution• Accuracy better than 10 W/m2

• Homogeneous after 1995

Applications

• Climate Monitoring • Solar Energy/Agricultural

Applications• Reanalysis evaluation

April 2013 4

Surface Solar Radiation

b) Global Radiation (Irradiance)

• Based on AVHRR• 1982 – 2009• 0.25 spatial resolution• Accuracy better than 10 W/m2

Applications

• Climate Monitoring • Solar Energy/Agricultural

Applications• Reanalysis Evaluation

• Data available

• Results from modified retrieval of solar

radiation currently under investigation,

• Merging of different data sets possible

April 2013 5

Cloud Fraction

Cloud Fraction

• Based on AVHRR• 1982 – 2009• 0.25 spatial resolution

Applications

• Climate Monitoring • Reanalysis Evaluation• Solar Energy Applications etc.

April 2013 6

Surface Albedo

Surface Albedo

• based on AVHRR• 1982 – 2009• 0.25 spatial resolution

Applications

• Climate Monitoring • Reanalysis Evaluation• Snow Monitoring, etc.

April 2013 7

Surface Precipitation

Precipitation

• based on GPCC / HOAPS 3.2• 1987 – 2008• 0.5 deg spatial resolution

Applications

• Climate Monitoring • Reanalysis Evaluation• Hydrological Modeling, etc.

April 2013 8

EURO4M Precipitation vs. GPCP

EURO4M GPCP

• High spatial resolution• GPCP overestimates

surface precipitation in Europe

April 2013 9

Integrated Water Vapor

Water Vapor

• Based on ATOVS• 1999 – 2010• approx. 1 deg resolution

Applications

• Climate Monitoring • Reanalysis Evaluation• etc.

April 2013 10

• Selected satellite data sets already available

• Partly used already for evaluation of EURO4M

reanalysis data

• Surface Solar radiation data set will be further

assessed

• Data available via ftp-server upon request:

contact.euro4m@dwd.de

Summary