气象2017，Vol.43Issue(5)：573-580,8.DOI:10.7519/j.issn.1000-0526.2017.05.006
基于FY-3C/MWTS-Ⅱ数据估计西北太平洋热带气旋强度
Estimating Intensity of Tropical Cyclone over the Western North Pacific Based on FY-3C/MWTS-Ⅱ Data
摘要
Abstract
A technique for estimating tropical cyclone (TC) intensity over the Western North Pacific utilizing FY-3C Microwave Temperature Sounding (MWTS-Ⅱ) data was developed.First,the limb-adjustment was conducted to correct the data of Channels 5 8 to the values they would have in a vertical view,and the corrected deviations were all smaller than the instrument sensitivity.Then the radiance anomaly (core value minus an average environmental value) was used to analyze the characteristics of the TC warm core,and the magnitude and shape feature of the warm core were found related to the TC intensity.As TC intensity gets stronger,the magnitude increases and the shape feature gets clearer and more complete.Final ly,an estimation model was estabished using the maximun radiance anomaly of Channel 6 and Channel 7.The standard deviation was 13.0 hPa.After the correction of the bias resulted from the unevenly distribution of MWTS-Ⅱ footprints,the standard deviation was reduced to 12.0 hPa,and,then further reduced to 11.1 hPa after the latitude was taken into account.关键词
风云三号卫星/新型微波温度计/暖核/热带气旋强度Key words
FY-3/microwave temperature sounding/warm core/tropical cyclone intensity分类
天文与地球科学引用本文复制引用
张淼,覃丹宇,邱红..基于FY-3C/MWTS-Ⅱ数据估计西北太平洋热带气旋强度[J].气象,2017,43(5):573-580,8.基金项目
国家重点研发计划重点专项(2016YFA0600101)和国家自然科学基金青年基金项目(41605028)共同资助 （2016YFA0600101）
