ASCAT assimilation in HIRLAM report

Ministry of Infrastructure and the Environment, Royal Netherlands Meteorological Institute (KNMI), P. de Valk
De Bilt : KNMI

The data of the space-born radar ASCAT provides global wind information over water surfaces, including data sparse oceans. The use of these data in global numerical weather prediction (NWP) models leads to improved forecasts. In regional NWP the ASCAT data is less frequently used. This study focuses on the assimilation of ASCAT data in the regional HIRLAM model. The results show a modest positive to neutral impact on the forecast up to 6 hours.

38 p.
Fig., tab.
(Intern rapport ; IR 2013-02)