R - University of Wisconsin MM5 Real Time Forecast and Forecast ...
R - University of Wisconsin MM5 Real Time Forecast and Forecast ...
R - University of Wisconsin MM5 Real Time Forecast and Forecast ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Impact studies or “what if?” experiments• Impact studies involve studying the effects a specificinitial <strong>and</strong>/or boundary perturbation (x 0 ) to an NWPmodel has on some aspect <strong>of</strong> a forecast.• While these perturbations are <strong>of</strong>ten chosen based on“synoptic intuition”, typically the precise choice <strong>of</strong> thelocation <strong>and</strong> structure <strong>of</strong> the imposed initialperturbations is not known.• The chosen perturbations may have very little impacton the weather system <strong>of</strong> interest.• As these studies are performed to assess theimportance <strong>of</strong> a particular synoptic feature, manyintegrations are needed to yield useful results.