Impact of AMSU-A and MHS radiances assimilation on Typhoon Megi (2016) forecasting

Abstract

To better understand the assimilation contribution and influence mechanism of different satellite platforms and different microwave instruments, the radiance data of Advanced Microwave Sounding Unit-A (AMSU-A) and the Microwave Humidity Sounder (MHS) onboard NOAA-15 and NOAA-18 are assimilated to investigate various assimilation effects on the prediction of path and intensity of Typhoon Megi (2016) based on Weather Research and Forecasting (WRF) three-dimensional variation and the WRF model. The community radiative transfer model is employed as the forward operator. The quality control and bias correction procedures before the radiance data assimilation (DA) are performed to improve the simulations.

Keywords

• assimilation
• weather research and forecasting model’s three-dimensional variational data assimilation system
• typhoon megi (2016)
• advanced microwave sounder unit-a
• microwave humidity sounder