February 21, 2019
Title: Impact of Radio Occultation Data on Tropical Cyclone Prediction
Ying-Hwa "Bill" Kuo
Tropical cyclones are one of the most devastating severe weather systems that are responsible for huge loss of lives and properties every year. Accurate prediction of tropical cyclones by numerical models has been a significant challenge, largely because of the lack of observations over the tropical oceans. The atmospheric limb sounding technique, which makes use of radio signals transmitted by global navigation satellite systems, has evolved as a robust global observing system. This technique, known as GPS radio occultation (RO) can provide valuable water vapor and temperature observations for the analysis and prediction of tropical cyclones. Research conducted over the past ten years showed that the RO data are extremely valuable to improve the prediction of the genesis, track, intensity, and precipitation forecast of tropical cyclones. In this presentation, we will review the recent progress on the impact of RO data on tropical cyclone prediction. We will discuss the challenges and promises of RO data in the lower tropical troposphere, and how to optimally use the RO data to improve tropical cyclone prediction.