Retrieval of temperature profiles in tropical cyclone Nanmadol from resampled advanced technology microwave sounder observations

被引:1
|
作者
Li, Wenyu [1 ,2 ]
Weng, Fuzhong [2 ]
机构
[1] Chinese Acad Meteorol Sci, Beijing, Peoples R China
[2] CMA Earth Syst Modeling & Predict Ctr, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
Microwave sounding; Resampling; One-dimension variational (1DVAR) retrieval; Tropical cyclone (TC); WARM-CORE STRUCTURE;
D O I
10.1016/j.rse.2024.114068
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In the past, satellite microwave sounding data are often utilized for retrieving the thermal structure of tropical cyclones (TCs). However, the spatial resolutions and scan pattern of the instruments vary from one to another and can affect the retrievals of TC structures. In this study, Backus -Gilbert Inversion (BGI), ATOVS and AVHRR Pre-processing Package (AAPP) filter and N x N field -of -views (FOVs) average algorithms are utilized to resample the Advanced Technology Microwave Sounder (ATMS) data and the impacts from different resampling algorithms on brightness temperature structures and retrieved atmospheric temperature are analyzed. It is shown that for ATMS channel 1 to 2, the larger differences between original and resampled brightness temperatures are found in cloudy areas and at the land -ocean boundary. When ATMS channels 1-16 data are resampled to the AMSU-like resolution, the brightness temperatures become less noisy at channel 3 to 16 and can lead to a higher convergence rate in the one -dimension variational (1DVAR) algorithm. Furthermore, the warm core intensity of a tropical storm of Nanmadol is reduced by about 2.5 K and its size becomes smaller after the ATMS data is resampled to the AMSU resolution.
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页数:14
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