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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
slide3
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

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.

slide10

CM-SAF: Surface Radiation

Surface Solar radiation, monthly mean, July 2005

AVHRR

SEVIRI

slide11

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

From B. Dürr, MeteoSwiss

slide14

Example Product Applications- 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

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 -
slide16

Add-on PRODUCTS- direct irradiance -

Example: NOAA overpass 03.03.2004, 13:12 UTC

W/m²

SIS

Direct Irradiance

slide17

Final remarks

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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