Presented By: Climate and Space Sciences and Engineering
CLASP Seminar Series: Prof. William Kuo, of UCAR
Prof. William Kuo, of UCAR will give a virtual lecture as part of the CLASP Seminar Series. Please join us!
This a Zoom virtual event.
Zoom link: https://umich.zoom.us/j/94447382809?pwd=cTc5Rnd4NlFkcWwzN2UrNkloQ2pxQT09
Meeting ID: 944 4738 2809
Passcode: 421507
TITLE: Impact of Radio Occultation Data on the Prediction of Tropical Cyclogenesis
ABSTRACT: 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 cyclogenesis 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 (GNSS), has evolved as a robust global observing system. This technique, known as radio occultation (RO) can provide valuable water vapor and temperature observations for the analysis and prediction of tropical cyclogenesis. Using the WRF modeling and data assimilation system, we show that the assimilation of RO data can substantially improve the skills of the model in predicting the tropical cyclogenesis for ten typhoon cases that took place over the Western Pacific from 2008 to 2010. To gain insight on the impact of GPS RO data assimilation, we perform a detailed analysis of the formation process of Typhoon Nuri (2008), and examine how the assimilation of the GPS RO data enables the model to capture the cyclogenesis. The joint Taiwan-U.S. COSMIC-II mission was launched in June 2019. It has been providing more than 5,000 GPS RO data per day over the tropics since March 2020, after the check-out phase. This offers a great opportunity for research and operational prediction of tropical cyclogenesis.
This a Zoom virtual event.
Zoom link: https://umich.zoom.us/j/94447382809?pwd=cTc5Rnd4NlFkcWwzN2UrNkloQ2pxQT09
Meeting ID: 944 4738 2809
Passcode: 421507
TITLE: Impact of Radio Occultation Data on the Prediction of Tropical Cyclogenesis
ABSTRACT: 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 cyclogenesis 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 (GNSS), has evolved as a robust global observing system. This technique, known as radio occultation (RO) can provide valuable water vapor and temperature observations for the analysis and prediction of tropical cyclogenesis. Using the WRF modeling and data assimilation system, we show that the assimilation of RO data can substantially improve the skills of the model in predicting the tropical cyclogenesis for ten typhoon cases that took place over the Western Pacific from 2008 to 2010. To gain insight on the impact of GPS RO data assimilation, we perform a detailed analysis of the formation process of Typhoon Nuri (2008), and examine how the assimilation of the GPS RO data enables the model to capture the cyclogenesis. The joint Taiwan-U.S. COSMIC-II mission was launched in June 2019. It has been providing more than 5,000 GPS RO data per day over the tropics since March 2020, after the check-out phase. This offers a great opportunity for research and operational prediction of tropical cyclogenesis.
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