Accurate estimations of typhoon-level winds are highly desired over the western Pacific Ocean. A wind speed retrieval algorithm is used to retrieve the wind speeds within Super Typhoon Nepartak (2016) using 6.9- and 10.7-GHz brightness temperatures from the Japanese Advanced Microwave Scanning Radiometer 2 (AMSR2) sensor on board the Global Change Observation Mission-Water 1 (GCOM-W1) satellite. The results show that the retrieved wind speeds clearly represent the intensification process of Super Typhoon Nepartak. A good agreement is found between the retrieved wind speeds and the Soil Moisture Active Passive wind speed product. The mean bias is 0.51 m/s, and the root-mean-square difference is 1.93 m/s between them. The retrieved maximum wind speeds are 59.6 m/s at 04:45 UTC on July 6 and 71.3 m/s at 16:58 UTC on July 6. The two results demonstrate good agreement with the results reported by the China Meteorological Administration and the Joint Typhoon Warning Center. In addition, Feng-Yun 2G (FY-2G) satellite infrared images, Feng-Yun 3C (FY-3C) microwave atmospheric sounder data, and AMSR2 brightness temperature images are also used to describe the development and structure of Super Typhoon Nepartak.
1.Natl Univ Def Technol, Inst Meteorol & Oceanog, Nanjing 211101, Jiangsu, Peoples R China 2.Beijing Piesat Informat Technol Co Ltd, Beijing 100195, Peoples R China 3.Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China 4.Hohai Univ, Coll Oceanog, Nanjing 211101, Jiangsu, Peoples R China
Recommended Citation:
Zhang, Lei,Yin, Xiaobin,Shi, Hanqing,et al. Estimation of wind speeds inside Super Typhoon Nepartak from AMSR2 low-frequency brightness temperatures[J]. FRONTIERS OF EARTH SCIENCE,2019-01-01,13(1):124-131