1. Validation of the H01,H02 & H03 products over Turkey
İbrahim SÖNMEZ1, Ahmet ÖZTOPAL2,
1Turkish State Meteorological Service, Turkey
2Istanbul Technical University, Turkey

2. Content Ground observation Network Validation metedology
Scatter & pdf plots
Validation statistics
Results
Discussion

3. Ground Observation Netwok
Sites : AWOS (Automated Weather Observation Station)

4. Ground Observation Netwok
Sites : AWOS (Automated Weather Observation Station)
Observed at every 1 minute:
Precipitation
Temperature
Relative humidity
Wind speed & direction
Observed at every 10 minute:
Pressure
Soil temperature at different depths
Evaporation

5. RG Quality Control Procedures
Tests applied to the precipitation data:
Range Test (climatological comparison)
Step Test (sequential observation comparison)
Persistance Test (group of observation comparison)
Flag Value Status Brief Description
Good Datum has passed all QA Test
Suspect There is concern about accuracy of datum
Warning Datum is very questionable
Failure Datum is unstable 5

6. Validation Methodology
FOV for H02
AMSU(H02) product FOV centers 00:28

7. Validation Methodology
AMSU(H02) product FOV centers 00:28]
* : awos
+ : product

8. Validation Methodology
AMSU(H02) product FOV centers 00:28]
* : awos
+ : FOV center

9. Validation Methodology
Observation
Product
* : awos
+ : FOV center
point area
How to compare these two?
Either,
Or,

10. Validation Methodology
* : awos
+ : FOV center

11. Validation Methodology?
W(r) determined by PCSV (Sen,1996):
The observations are used rather than theorotical functions, such as Cressman or Barnes.
* : awos
+ : FOV center

12. Validation Results – Scatter Plots(H01)

13. Validation Results – Scatter Plots(H01)

14. Validation Results – Scatter Plots(H02)

15. Validation Results – Scatter Plots(H03)

16. Validation Results – pdf Plots

17. Validation Results – Correlation variation

18. Validation Results – Std variation

19. Summary & Conclusions H01 : overestimation is dominant
H01 : Relatively lower RR are observed over cost than land
H02 : overestimation is dominant
H02 : RR over cost ~= RR over land
H02 : increasing RR amounts through summer is observed
RR amount of H02 < RR amount of H01 for a particular month

20. Summary & Conclusions H03 : underestimation is dominant
H03 : no significant difference over land & cost
HO3 : relatively lower RR are observed respect to H01 & H02 product

21. Summary & Conclusions
JFM period : highest H02 among three products
AMJ period :highest H01 among three products
H02& H03: Higher correlation occured in winter.
Decreasing std trend through summer months is observed for H01&H02
Increasing std trend through summer months is observed for H03
Highest std in winter months is observed in H01 while H03 has the highest amount in summer time.

22. Questions & Comments