24th GIST, London14 – 16 December 20051

Rainer Hollmann

Recent developments in the CMSAFR. Hollmann

DWD

24th GIST, London14 – 16 December 20052

Rainer Hollmann

Content of Talk

Overview of Surface Radiation products

Results of validation

Applications of products

‘new’ products

Final remarks

24th GIST, London14 – 16 December 20053

Rainer Hollmann

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

24th GIST, London14 – 16 December 20054

Rainer Hollmann

Example MSG productsMonthly mean 2005,07: top SOL, SDL; bottom SIS, SAL

24th GIST, London14 – 16 December 20055

Rainer Hollmann

Example MSG products

Monthly mean 2005,07: left SNL; right SNS

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Rainer Hollmann

050

100150200250300350400450500

0 50 100 150 200 250 300 350 400 450 500

SIS (Satellite) W/m²

SIS

(S

urf

ace)

in

W/m

²

CAR PAY LIN CAB

Example operational validationSIS, daily mean since 03/2004

24th GIST, London14 – 16 December 20057

Rainer Hollmann

200

250

300

350

400

450

500

200 250 300 350 400 450 500

SDL (Satellite) in W/m²

SD

L (

Su

rfac

e) i

n W

/m²

CAR PAY LIN CAB

Example operational validationSDL, daily mean since 03/2004

24th GIST, London14 – 16 December 20058

Rainer Hollmann

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

Investigation of SOL/SDL cold bias Payerne

24th GIST, London14 – 16 December 20059

Rainer Hollmann

Example operational validationSIS, bias Lindenberg

Lindenberg (daily means)

-50

-40

-30

-20

-10

0

10

20

30

40

50

Mrz 04

Apr 04

Mai 04

Jun 04

Jul 04

Aug 04

Sep 04

Okt 04

Nov 04

Dez 04

Jan 05

Feb 05

Mrz 05

Apr 05

Mai 05

Jun 05

Jul 05

Aug 05

Sep 05

Okt 05

Nov 05

Dez 05

month

Bia

s in

W/m

²

SDL-NOAA SOL-NOAA SIS-NOAA SDL-MSG SIS-MSG

24th GIST, London14 – 16 December 200510

Rainer Hollmann

CM-SAF: Surface RadiationSurface Solar radiation, monthly mean, July 2005

AVHRR SEVIRI

24th GIST, London14 – 16 December 200511

Rainer Hollmann

CM-SAF: CloudClouds fractional cover: monthly mean / July 2005

AVHRR SEVIRI

24th GIST, London14 – 16 December 200512

Rainer Hollmann

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.

24th GIST, London14 – 16 December 200513

Rainer Hollmann

Sub-pixel variability

From B. Dürr, MeteoSwiss

24th GIST, London14 – 16 December 200514

Rainer Hollmann

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 %)

24th GIST, London14 – 16 December 200515

Rainer Hollmann

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)

24th GIST, London14 – 16 December 200516

Rainer Hollmann

Add-on PRODUCTS- direct irradiance -

Example: NOAA overpass 03.03.2004, 13:12 UTC

SISDirect Irradiance

W/m

²

24th GIST, London14 – 16 December 200517

Rainer Hollmann

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