空间科学学报2023，Vol.43Issue(6)：1100-1110,11.DOI:10.11728/cjss2023.06.2023-0062
飓风天气下机载SFMR与星载微波遥感海面风速的对比分析
Comparisons of SFMR and Satellite Microwave Remote Sensed Sea Surface Wind Speed in Hurricane Weather
摘要
Abstract
The accuracy and consistency of sea surface wind speed measurements during hurricane conditions have garnered significant attention.Among the various techniques,the Stepping Frequency Microwave Radiometer(SFMR)provides crucial in-situ data on sea surface high wind speeds.This study aims to compare wind speed measurements obtained from SFMR with those from space-borne micro-wave scatterometers such as the C-band European MetOp series satellite Scatterometer ASCAT,the Ku-band China-France Oceanography Satellite(CFOSAT)Scatterometer CSCAT,and the Chinese HY-2 se-ries satellite Scatterometer HSCAT,as well as microwave radiometers such as SMAP and SMOS.We es-tablish the relationship between SFMR wind speed and spatial scale and propose a spatio-temporal matching method to align SFMR data with scatterometer and radiometer data.This method assumes that the spatial distribution of TC wind field is unchanged relative to the hurricane direction in a cer-tain time range.According to the TC center path information of IBTrACS,the trajectory of SFMR is transformed into the relative coordinates of storm movement,which effectively extending the matching time difference between SFMR,scatterometer and radiometer sea surface wind speed data to 3 hours.Our findings indicate that radiometer measurements of high wind speeds(>15 m·s-1)exhibit greater con-sistency with SFMR compared to scatterometer measurements,and Ku-band scatterometer measure-ments tend to saturate when wind speeds exceed 25 m·s-1.The spatio-temporal matching results of SMAP and HSCAT also showed the same distribution characteristics.However,the ASCAT wind speed of C-band scatterometer still shows the overall increasing distribution characteristics.Additionally,Rain-fall during high wind conditions significantly affects scatterometer wind speed error is still observed by us,although the error associated with wind speed is more pronounced.This study contributes to a bet-ter understanding of the error characteristics of sea surface wind speed measurements obtained from space-borne microwave scatterometers and radiometers,thereby offering valuable insights for the appli-cation of remote sensing data,subsequent research can analyze the contribution of different data sources in the physical meaning of wind speed to the consistency analysis results.关键词
飓风/SFMR/微波散射计/微波辐射计/高风速/真实性检验Key words
Hurricane/SFMR/Microwave scatterometer/Mcrowave radiometer/High wind speed/Authenticity test分类
海洋科学引用本文复制引用
钟俊杰,王志雄,邹巨洪,林文明..飓风天气下机载SFMR与星载微波遥感海面风速的对比分析[J].空间科学学报,2023,43(6):1100-1110,11.基金项目
国家重点研发计划项目资助(2022YFC3104901) （2022YFC3104901）
