1. Estimation of Rainfall over Bangladesh
Toru Terao(Osaka Gakuin Univ.)

2. TRMM 3A25 Monthly
Ｊｕｌ
Ａｕｇ
1998
Bangladesh Flood
1999
2000

3. Rainfall South of Hills is not Represented?
CMAP
Rainfall South of Hills is not Represented?
Ｊｕｌ
Ａｕｇ
１９９８
Bangladesh Flood
１９９９

4. Raingauges in Bangladesh
BMD(Bang. Met. Dep.)
Daily ×

5. CMAP Grids CMAP grids over Bangla. We examined...
Grid A: 12 BMD stations
Grid B: 9 BMD stations
Grid C: 9 BMD stations
Grid D: No BMD stations D C A B

6. CMAP timeseries (JJAS)B
Good correlation after 1992
Significant underestimation in 1984 when severe flood attacked Bangladesh C

7. Comparison, Grid A Jun: 0.07 Jul: 0.46 Aug: 0.29 Sep: 0.25 JJAS: 0.08
-1991: -0.41
1992-: 0.95

8. Comparison, Grid B Jun: 0.30 Jul: 0.54 Aug: 0.62 Sep: 0.44 JJAS: 0.16
-1991: 0.06
1992-: 0.86

9. Comparison, Grid C Jun: 0.78 Jul: 0.79 Aug: 0.40 Sep: 0.66 JJAS: 0.63
-1991: 0.48
1992-: 0.96

10. Raingauges vs. Grid A A A

11. Raingauges vs. Grid B B B

12. Raingauges vs. Grid C C C

13. CMAP Grid vs. BMD Obs. Drastic change around 1991-1992
Small correlation before 1991
Significant Underestimation in 1984
Large correlation after 1992
Better estimation for grid C
due to Indian data?