基于FY-4A AGRI数据研究2023-02-06土耳其地震水汽异常变化  

Research on Water Vapor Anomaly of 2023-02-06 Türkiye Earthquakes Based on FY-4A AGRI Data

作　　者：周羿 王新志 许昌 ZHOU Yi;WANG Xinzhi;XU Chang(School of Remote Sensing and Geomatics Engineering,Nanjing University of Information Science and Technology,219 Ningliu Road,Nanjing 210044,China;Wuxi Institute,Nanjing University of Information Science and Technology,50 Shanhe Road,Wuxi 214101,China;Jiangsu Engineering Center for Collaborative Navigation/Positioning and Smart Applications,219 Ningliu Road,Nanjing 210044,China;Collaborative Innovation Center of Long Bridge Safety Operation Application Technology,1515 Moganshan Road,Hangzhou 311112,China;School of Road and Bridge,Zhejiang Institute of Communications,1515 Moganshan Road,Hangzhou 311112,China)

机构地区：[1]南京信息工程大学遥感与测绘工程学院,南京市宁六路219号,210044 [2]南京信息工程大学无锡研究院,江苏省无锡市山河路50号,214101 [3]江苏省协同精密导航定位与智能应用工程研究中心,南京市宁六路219号,210044 [4]长大桥梁安全运营应用技术协同创新中心,杭州市莫干山路1515号,311112 [5]浙江交通职业技术学院路桥学院,杭州市莫干山路1515号,311112

出　　处：《大地测量与地球动力学》2023年第12期1294-1299,共6页Journal of Geodesy and Geodynamics

基　　金：江苏省重点研发计划(BE2021622);江苏省自然科学基金(BK20211037);江苏省高等教育教改项目(2021JSJG219);常州市科技支撑计划(CE20225026)。

摘　　要：首先利用探空数据对风云四号气象卫星A星(FY-4A)先进的静止轨道辐射成像仪(AGRI)提供的水汽产品进行精度验证;然后利用AGRI获取2023-02-06土耳其地震震中区域水汽、陆表温度和降水估计的时间序列,并对水汽异常变化特征进行分析。结果表明:1) AGRI水汽和探空水汽的相关系数为0.90,RMSE和平均bias分别为2.51 mm和-0.06 mm;2)临震时,AGRI水汽方差上升至0.029-0.156 mm,波动加剧;震后,AGRI水汽出现一个明显的陡升-陡降过程;3)基于AGRI陆表温度和降水估计,推断出现水汽异常变化的原因可能是地震后地面热作用增加使得水汽上升,在峰值时形成降水,导致水汽急剧下降。We first verify the accuracy of water vapor products provided by the FY-4A satellite advanced geostationary radiation imager(AGRI)using radiosonde data.Then,we analyze the characteristics of water vapor anomaly changes using water vapor,land surface temperature and quantitative precipitation estimation provided by AGRI in the epicenter region of 2023-02-06 Türkiye earthquakes.The results show that:1)The correlation coefficient between AGRI water vapor and radiosonde water vapor is 0.90,and the RMSE and mean bias are 2.51 mm and-0.06 mm respectively.2)Prior to the earthquake,the variance of AGRI water vapor increased to 0.029~0.156 mm,with intensified fluctuations.After the earthquake,AGRI water vapor exhibited a distinct sharp rise and fall process.3)Using the AGRI land surface temperature and quantitative precipitation estimation of AGRI data,we estimate that the reason for the water vapor anomaly may be that the increased thermal action of the ground after the earthquake caused water vapor to rise and form precipitation at the peak,resulting in a sharp drop in water vapor.

关 键 词：FY-4A AGRI 探空 水汽 陆表温度 降水估计 土耳其地震 

分 类 号：P228[天文地球—大地测量学与测量工程] P315[天文地球—测绘科学与技术]