IAU alike Initialization Applied to HWRF for Hurricane Forecast

Tuesday, 19 April 2016: 11:15 AM
Ponce de Leon C (The Condado Hilton Plaza)
Banglin Zhang, EMC, College Park, MD; and V. Tallapragada, F. Weng, S. Trahan, Q. Liu, and M. Tong

Satellite data assimilation has been applied in operational HWRF since 2013. One big problem from DA is the spin-up and spin-down in first a few hours of forecast. This is because the analysis increment has the non-balanced component, which results in big model adjustments. To reduce the big spin-up and spin-down, an IAU alike initialization scheme was applied to WRF model integration. The initial tests show positive impact when comparing against with control runs where no IAU was applied.
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