S/C波段雷达和X波段雷达混合仰角反射率拼图方法
Mosaicking Hybrid-tilt Radar Reflectivities from S-or C-band Weather Radars and X-band Weather Radars
摘要
Abstract
The changing climate has increased the frequency of hazardous weather events,which has placed high demands on monitoring hazardous weather.In addition to the conventional S-and C-band operational radar networks,in recent years,many cities in China have built X-band weather radar monitoring networks to improve the spatiotemporal resolution of hazardous weather monitoring and the low-level observation information of weather systems.The hybrid-tilt reflectivity is extracted from the multi-tilt radar measurements over the radar domain,which is closest to the surface and unaffected by blockage due to terrain or surface features.This reflectivity is important for monitoring the occurrence and development of convective systems.To take advantage of the wide detection range of S-or C-band weather radars and the high spatiotemporal resolution of X-band weather radars,this study presents a method for mosaicking hybrid-tilt radar reflectivities derived from the measurements of S-or C-band and X-band weather radars.This method involves(1)generating hybrid-tilt reflectivity,(2)converting radar reflectivity across different frequencies,and(3)mosaicking reflectivity measurements from multiple radars.Based on this method,the hybrid-tilt reflectivity mosaic products for Shenzhen and Xi'an are generated,which have spatial and temporal resolutions of 30 m and 1 min,respectively.These products are evaluated during different types of precipitation events using the reflectivity data from the Dual-frequency Precipitation Radar(DPR)onboard the Global Precipitation Measurement(GPM)core observatory(GPM-DPR).Results show that the hybrid-tilt reflectivity mosaic products are highly consistent with the GPM-DPR reflectivity measurements,with mean errors being within±1 dB.关键词
X波段天气雷达/混合仰角反射率/雷达组网拼图Key words
X-band weather radar/Hybrid-tilt radar reflectivity/Radar mosaicking分类
大气科学引用本文复制引用
朱自伟,戚友存,张哲,刘瑞芳,乔娟,张春生,罗鸣..S/C波段雷达和X波段雷达混合仰角反射率拼图方法[J].大气科学,2025,49(2):419-431,13.基金项目
国家重点研发项目2022YFC3002904、2022YFC3004101,国家自然科学基金气象联合基金项目U2442201,海南省重点研发项目ZDYF2023SHFZ125,福建省科技计划引导性项目2024Y0076,安阳市重大科技专项 2022A02SF005,陕西省科技厅自然科学基础研究计划项目2023-JC-YB-282,中国气象局复盘总结专项 FPZJ2023-132,福建省灾害天气重点实验室开放课题2021KFKT01,中国博士后科学基金面上资助项目2024M753194,国家资助博士后研究人员计划项目GZB20230738 Funded by National Key Research and Development Program of China(Grants 2022YFC3002904,2022YFC3004101),Joint Funds of the National Natural Science Foundation of China(Grant U2442201),Key Research and Development Program of Hainan(Grant ZDYF2023SHFZ125),Fujian Provincial Science and Technology Plan Guided Project(Grant 2024Y0076),Major Scientific and Technological Special Project of Anyang(Grant 2022A02SF005),Natural Science Basic Research Program of Shaanxi(Grant 2023-JC-YB-282),Review and Summary Special Project of China Meteorological Administration(Grant FPZJ2023-132),Fujian Key Laboratory of Severe Weather(Grant 2021KFKT01),China Postdoctoral Science Foundation(CPSF)(Grant 2024M753194),Postdoctoral Fellowship Program of CPSF(Grant GZB20230738) （Grants 2022YFC3002904,2022YFC3004101）
