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

Figure 4

Cost functions with respect to the number of total iterations accumulated by the 6 outer loops indicated on top of the solid curve. The three cost functions are from three experiments that use the assimilation window length of 5 minutes (4DV_T05), 15 minutes (4DV_T15), and 30 minutes (4DV_T30) (from [20]).