FY-3D卫星MWRI资料反演洋面台风降雨率  

Retrieval of typhoon precipitation rate over ocean surface based on FY-3D/MWRI Data

作　　者：商洁 吴莹[1,2] 邹依珂 马靖雯 SHANG Jie;WU Ying;ZOU Yike;MA Jingwen(Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,CMA Key Laboratory for Aerosol-Cloud-Precipitation,Nanjing University of Information Science and Technology,Nanjing 210044,China;School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [2]南京信息工程大学大气物理学院,江苏南京210044

出　　处：《热带海洋学报》2024年第5期32-40,共9页Journal of Tropical Oceanography

基　　金：国家自然科学基金项目(U2242212)。

摘　　要：利用FY-3D卫星上搭载的微波成像仪(microwave radiation imager,MWRI)的一级亮温数据,结合二级降雨率沿轨产品,基于极化订正温度及散射指数(polarization corrected temperature and scattering index,PCT-SI)综合法,建立了升轨洋面和降轨洋面两种降雨率反演模型,并通过多个台风个例对本研究建立的两种模型进行验证。结果表明,升轨数据与降轨数据反演降雨的效果差异不大,反演的降雨分布区域比二级产品降雨区域略大;两种模型均倾向于高估降雨低值、低估降雨高值;升轨反演模型的相关系数、平均绝对误差和均方根误差分别为0.72632、2.3055mm·h^(−1)和2.7254mm·h^(−1),降轨反演模型的相关系数、平均绝对误差和均方根误差分别为0.73363、1.9079mm·h^(−1)和2.3651mm·h^(−1)。Using the first level brightness temperature data of the microwave radiation imager(MWRI)carried on the FY-3D(Fengyun-3D)satellite,combined with the second level(L2)precipitation orbit product,and based on the polarization corrected temperature and scattering index(PCT-SI)comprehensive method,two precipitation rate inversion models for the ascending and descending orbit ocean surfaces were established,the two models established in this study were also validated by multiple typhoon cases.The results show that there is little difference in the effectiveness of inversion of precipitation between the ascending orbit data and the descending orbit data,and the precipitation distribution area retrieved is slightly larger than that of the L2 product precipitation area;both models tend to overestimate the low value of precipitation and underestimate the high value of precipitation;the correlation coefficient,mean absolute error,and root mean square error of the ascending orbit inversion model are 0.72632,2.3055mm·h^(−1)and 2.7254 mm·h^(−1),respectively.The correlation coefficient,average absolute error,and root mean square error of the descending orbit inversion model are 0.73363,1.9079 mm·h^(−1)and 2.3651 mm·h^(−1),respectively.This study has successfully inverted the distribution area of ocean surface precipitation and near surface precipitation rate,providing a reference for estimating the distribution of ocean surface typhoon precipitation and precipitation rate inversion using satellite borne microwave imaging data.

关 键 词：微波成像仪 台风 洋面 降雨率 反演 

分 类 号：P732.31[天文地球—海洋科学]