Hyperspectral IR sounders such as AIRS onboard NASA's EOS Aqua platform
and IASI onboard the Europe's METOP-A satellite provide unprecedented global
atmospheric temperature and moisture soundings with high accuracy and vertical
resolution. The AIRS and IASI radiance measurements have been used in the global
Numerical Weather Prediction (NWP) models with positive impact on weather forecasts.
We also applied the full spatial resolution soundings retrieved with CIMSS Hyperspectral
IR Sounding Retrieval (CHISR) algorithm from AIRS to tropical cyclone track and
intensity forecasts within a regional model - WRF. We found that through assimilating
the AIRS full spatial resolution temperature and moisture soundings, the tropical cyclone
track and intensity forecasts are significantly improved, the water vapor information
plays more important role in the forecast than the temperature information.