Studies on the Impacts of 3D-VAR Assimilation of Satellite Observations on the Simulation of Monsoon Depressions over India - Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications - page 678

a b c d

e f g h

i j

Fig. 26.20 NCEP-FNL analysis sea level pressure fields at 20 June 2007 00 UTC - 22 June 2007
06 UTC ( a - d ), NCEP-FNL lower tropospheric wind speed (850 hPa) ( e - h ) and 24 h accumulated
TRMM rainfall ( i - j )

Forecast Impact Parameter

As in the previous case, the FI parameter has been calculated against QuikSCAT
observations to study the impact of assimilation of the satellite observations on the
surface wind speed over the sea. From Fig. 26.23 , the MODIS run shows negative FI