Ralf Lindau My_Summer_Term_Work

Diplomanden-Doktoranden-Seminar Bonn, now Cologne – 9. July 2007

My_Summer_Term_Work

Ralf Lindau

Projects & Studies I

• Of course teaching ( 0 k€)

• Do students need to know about Curvature Terms to understand the Coriolis force?

• Geoland (100 k€)

- Calculation of global soil moisture fields from AMSR - End of project 31.03.2007

- Final report (financial & scientific)

• GRAS-CMSAF-SAF Study ( 25 k€)

- Validation of Layered Precipitable Water from Champ (GRAS-SAF) and ATOVS (CM-SAF) by radiosondes

- Report delivered, but pending because of suspicious biases in CMSAF

retrieval

Diplomanden-Doktoranden-Seminar Bonn, now Cologne – 9. July 2007

Projects & Studies II

• OMDI III and IV ( 36 k€)

- Proposal for a future study (1. Dec 2007 to 30. June 2008) about error covariances of satellite retrievals

- Advantages of Iterative Lindau Kriging compared to ordinary Block Kriging

• LandCaRe (166 k€)

- Stand-alone runs of TERRA on 2.8 km resolution driven by 18-km

LM-Consortial runs

Susp.TPW bias of ATOVS

No

GME

NCEP

- 0.82 mm - 3 %

+ 3.67 mm + 14 %

+ 7.08 mm + 27 %

The bias using GME as first guess (standard) vanishes for „No first guess“

and is doubled, if NCEP is used.

Diplomanden-Doktoranden-Seminar Bonn, now Cologne – 9. July 2007

Error Covariance

D = ((x

+ x

) – (x

+ x

))

D = 2 Var – 2 Cov + Err1 + Err2 - 2 ErrCov

Error Covariance

D = ((x

+ x

) – (x

+ x

))

S = (x

+ x

)

+ (x

+ x

)

D = 2 Var – 2 Cov + Err1 + Err2 - 2 ErrCov

S = 2 Var + Err1 + Err2

Diplomanden-Doktoranden-Seminar Bonn, now Cologne – 9. July 2007

Error Covariance

D = ((x

+ x

) – (x

+ x

))

S = (x

+ x

)

+ (x

+ x

)

D = 2 Var – 2 Cov + Err1 + Err2 - 2 ErrCov

S = 2 Var + Err1 + Err2

S – D = 2 Cov + 2 ErrCov

Negative Kriging weights

  ^{   }

23 13 12 2

13 2 23 2 12

23 13 12 02 13 23 12 01 2 12 03

3 1 2

1

c c c c

c c

c c c c c c c c c

c

















 



Kriging is solving this matrix:

Kriging error is:

Diplomanden-Doktoranden-Seminar Bonn, now Cologne – 9. July 2007

LandCaRe 2020

TERRA stand-alone

Resolution 0.025° (2.8 km) 250 x 300 grid points

Reality/Computation factor 60

20 years: 4 months

Soil Temperature

After 6 days (2.5 hours

computing time) the

course initial resolution

is partly downscaled

Diplomanden-Doktoranden-Seminar Bonn, now Cologne – 9. July 2007

Uckermark

If the domain is reduced to 1° by 1°, (approx. area of Uckermark and Weisseritz county):

Reality/Computation factor: 3000

20 years: 60 h

Soil Temp, 1. Nov

Soil Temp, 1. Feb

Land-sea mask