Characterization of Tropical Cyclone Intensity Using the HY-2B Scatterometer Wind Data

Remote Sensing

卷:14

Marcos Portabella¹  Zhixiong Wang²  Wenming Lin²  Siqi Liu² 

[1] Department of Physical Oceanography, Institute of Marine Sciences (ICM-CSIC), 08003 Barcelona, Spain;

[2] School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China;

关键词: scatterometer;    tropical cyclone;    wind radii;    intensity;    HY-2 satellite;   

DOI  :  10.3390/rs14041035

来源: DOAJ

【 摘 要 】

The estimation of tropical cyclone (TC) intensity using Ku-band scatterometer data is challenging due to rain perturbation and signal saturation in the radar backscatter measurements. In this paper, an alternative approach to directly taking the maximum scatterometer-derived wind speed is proposed to assess the TC intensity. First, the TC center location is identified based on the unique characteristics of wind stress divergence/curl near the TC core. Then the radial extent of 17-m/s winds (i.e., R17) is calculated using the wind field data from the Haiyang-2B (HY-2B) scatterometer (HSCAT). The feasibility of HSCAT wind radii in determining TC intensity is evaluated using the maximum sustained wind speed (MSW) in the China Meteorological Administration best-track database. It shows that the HSCAT R17 value generally better correlates with the best-track MSW than the HSCAT maximum wind speed, therefore indicating the potential of using the HSCAT data to improve the TC nowcasting capabilities.

【 授权许可】

Unknown