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Recent developments in the CMSAF. R. Hollmann DWD. Overview of Surface Radiation products Results of validation Applications of products ‘new’ products Final remarks. Content of Talk. Covered area: 30° N to 80° N, 60° W to 60° E 15 x 15 km² sinusoidal projection

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Presentation Transcript

Content of talk

Overview of Surface Radiation products

Results of validation

Applications of products

‘new’ products

Final remarks

Content of Talk


Covered area: 30° N to 80° N, 60° W to 60° E

15 x 15 km² sinusoidal projection

NOAA-AVHRR based products operational available since Jan 2005

Daily and monthly means

MSG based products operational available for public since Sep 2005

Daily and monthly means.

Monthly mean diurnal cycle.

Products: Space-time resolution

Access to our products: http://www.cmsaf.dwd.de


Example msg products
Example MSG products

Monthly mean 2005,07: top SOL, SDL; bottom SIS, SAL


Example msg products1
Example MSG products

Monthly mean 2005,07: left SNL; right SNS


Example operational validationSIS, daily mean since 03/2004


Example operational validationSDL, daily mean since 03/2004


Investigation of sol sdl cold bias payerne
Investigation of SOL/SDL cold bias Payerne

Map of the region around Payerne. The width of the map is 25 miles.

The red star is Payerne location.


Example operational validationSIS, bias Lindenberg


CM-SAF: Surface Radiation

Surface Solar radiation, monthly mean, July 2005

AVHRR

SEVIRI


CM-SAF: Cloud

Clouds fractional cover: monthly mean / July 2005

AVHRR

SEVIRI


Conclusion validation

10 W/m² „target accuracy“ für monthly means (SIS,SOL,SDL) are in general achieved. Problems in the Alpine region, especially for the longwave radiation.

Support by MeteoSwiss.

Validation will proceed

user are informed about validation results on the web-page.

Conclusion Validation


Sub pixel variability
Sub-pixel variability (SIS,SOL,SDL) are in general achieved. Problems in the Alpine region, especially for the longwave radiation

From B. Dürr, MeteoSwiss


Example Product Applications (SIS,SOL,SDL) are in general achieved. Problems in the Alpine region, especially for the longwave radiation- solar energy -

Monthly sums of global radiation (kWh/m²) – March 2005 -

  • Satellite-Surface-Data product

  • Satellite based global irradiance compared with 20 ground based stations in Germany:

  • Mean absolute bias below 1 KWh (<1%)

  • using only 3 ground stations => 3.5 kWh (4 %)


Add on products sid direct irradiance

SID – important for planning of solar power plants (SIS,SOL,SDL) are in general achieved. Problems in the Alpine region, especially for the longwave radiation

SID – has been implemented by C. Matsoukas (FORTH, Crete) within a visiting scientist study

SID – first validation shows encouraging results (<15 W/m², monthly mean)

Add-on PRODUCTS- SID direct irradiance -


Add-on PRODUCTS (SIS,SOL,SDL) are in general achieved. Problems in the Alpine region, especially for the longwave radiation- direct irradiance -

Example: NOAA overpass 03.03.2004, 13:12 UTC

W/m²

SIS

Direct Irradiance


Final remarks (SIS,SOL,SDL) are in general achieved. Problems in the Alpine region, especially for the longwave radiation

Our current products are in general within the desired target accuracy < 10 W/m²

We have demonstrated key applications for user

Development of new products

support of RADAGAST

support of GEWEX-RFA

Access to our products: http://www.cmsaf.dwd.de


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