Review Article

WRF-ARW Variational Storm-Scale Data Assimilation: Current Capabilities and Future Developments

Figure 7

Vertical sections of analysis increments from experiments that assume a single observation of u-wind (left columns) and v-wind (right columns) with 1 ms−1 innovation located at the point marked by “+” in (a) and (d). The and increments (unit: ms−1) resulting from the analyses that use and as momentum control variables are shown in (a) and (d), respectively, and from the direct use of and as control variables that are shown in (b) and (e), respectively. The magnitudes of and increments on the observation level (6 km) are plotted as a function of x- and y-grid points. The horizontal grid spacing is 4 km.
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