A Preliminary Assessment of the Impact of Assimilating Satellite Soil Moisture Data Products on NCEP Global Forecast System

Figure 2

(a) (Top) mean 7-day diurnal cycle of 2 m relative humidity (%) averaged both spatially over the west CONUS region and temporally over the period of 2 April to 5 May 2012, for 7-day GFS forecast from CTL (red) and EnKF (green); (bottom) as in (top) but shows difference of CTL and EnKF, plus the results of a statistical Student’s t-test/significance test. The differences outside of the hollow bars attains the 95% confidence level based on Student’s t-test. (b) As in (a), but for the east CONUS region. (c) As in (a), but for 2 m air temperature. (d) As in (b), but for 2 m air temperature.

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