气象与环境学报2025，Vol.41Issue(4)：39-47,9.DOI:10.3969/j.issn.1673-503X.2025.04.005
辽宁两类暴雨期间东亚静止卫星成像仪资料观测特征
The Observation Characteristics of East Asia Geostationary Satellite Imager Data during Two Types of Rainstorm in Liaoning
摘要
Abstract
Four precipitation processes in the Liaoning Province under the background of the Cold Vortex and Sub-tropical High were analyzed,and the correlation between the infrared channel brightness temperature(center wave-length around12.0 μm)and water vapor channel brightness temperature(center wavelength around7.0 μm)of the FY-4B,ERA5 reanalysis,and automatic weather station data of the stationary meteorological satellites FY-4A,FY-4B,and H8/9(respectively referred to as FY-4B,FY-4B,and H8/9)was explored.Moreover,the observation char-acteristics and formation mechanism of precipitation clouds under different weather systems were compared and an-alyzed based on FY-4B,ERA5 reanalysis,and automatic weather station data.The analysis results are shown as fol-lows.The correlation coefficient between FY-4B and H8/9 satellite data is significantly higher than that of FY-4A.For different levels of precipitation,the larger the 5-minute precipitation,the lower the brightness temperature of the infrared and water vapor channels of precipitation clouds,and the temperature difference between water vapor and infrared channels is also closer to 0℃.The infrared channel brightness temperature of strong precipitation clouds with a 5-minute rainfall greater than 10 mm are concentrated in below-40℃,and the temperature differ-ence between water vapor and infrared channels of the strong precipitation clouds is within the range of-5 to 2℃.For precipitation of the same magnitude,the infrared channel brightness and water vapor channel brightness temperature of precipitation clouds under the influence of Cold Vortex are lower than those of precipitation clouds at the edge of the Subtropical High,and the temperature difference between water vapor and infrared channel brightness is also closer.Precipitation clouds of Cold Vortex generally appear in environments with strong static in-stability,strong vertical wind shear,and more dry and cold conditions.Due to the large difference in dew-point temperature at lower levels,the evaporation below the cloud base weakens precipitation more significantly.There-fore,for precipitation clouds with the same precipitation intensity,the infrared channel brightness temperature of precipitation clouds under Cold Vortex is lower than that of Subtropical High precipitation clouds.This research provides a reference for strengthening the comprehensive application of satellite data and improving rainstorm mo-nitoring capability in the future.关键词
暴雨/风云四号卫星/葵花8/9号卫星/冷涡/副热带高压Key words
Rainstorm/FY4/Himiwari 8/9/Cold Vortex/Subtropical High分类
天文与地球科学引用本文复制引用
YANG Xue,YANG Lei,GENG Shibo,CAO Shiteng,SUN Li,JIANG Chao,CHEN Yu..辽宁两类暴雨期间东亚静止卫星成像仪资料观测特征[J].气象与环境学报,2025,41(4):39-47,9.基金项目
中国气象局青年创新团队(CMA2024QN05)、中国气象局沈阳大气环境研究所联合开放基金课题(2024SYIAEKFZD02)、风云卫星应用先行计划(FY.APP.ZX-2023.01)、中国气象局创新发展专项(CXFZ2022J059、CXFZ2022J003、CXFZ2023J013、CXFZ2024J021、CXFZ2024J019)、中国气象局云降水物理实验室项目(2023CPML-B04)、辽宁气象科研项目(201901、202415)、辽宁省气象局人才计划项目(RC202501)和中国气象科学研究院科研项目(2023Z019)共同资助. （CMA2024QN05）
