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 683

a b

c d

e f

g h

Fig. 26.24 Spatial distribution of 24-h accumulated precipitation for CTRL ( a , b ), ATOVS ( c , d ),
SSM/I ( e , f ) and MODIS ( g , h ) for 18-22 June 2007 depression

four experiments. However, the SSM/I experiment has simulated the maximum
precipitation band closer to that of the observation when compared to the other
numerical experiments on the second day of the forecast. It is indeed surprising that
the SSM/I experiment contributed to improved forecast of rainfall pattern despite the
absence of profiles of vertical temperature and vertical humidity observations. It is to
be noted that the observations of “total precipitable water” (TPW) were assimilated