华南地震2017，Vol.37Issue(1)：8-16,9.DOI:10.13512/j.hndz.2017.01.002
利用GPS观测资料反演水汽含量及地震异常初步探讨
Retrieving Precipitable Water Vapor From GPS Observation Data and Primary Discussion of Earthquake PW Anomalies
摘要
Abstract
The use of the GNSS observation technology for estimating precipitable water vapor (PWV) is a brand-new technique developed in the 1990s.Precipitable water vapor are retrieved from GPS observation data (from China Mainland Tectonic Environment Monitoring Network,CMTEMN and Crustal movement observation network of Guangdong province) and contrast with the ECMWF total column water vapor data.It was found that the GPS PW match to the ECMWF TCWV data,so the authors supplied the ECMWF TCWV data to the GPS PW data to create a database of precipitable water vapor in Guangdong province from 2000 to 2014.In order to search for probable anomalies,the temporal variations of PW before and after several earthquakes (≥Ms 4.8)from 2000 that occurred in Guangdong province are summarized in this paper and so did the PW background.The PW in Guangdong area shows higher value during summer than during winter and higher values in the north region than in south region.The results also show that significant PW anomalies occurred in epicentral area one months before three Ms 4.8 earthquakes since 2000.The abnormal amplitude is more than 30 mm and the high PW area distributed along the tectonic belt.We also found the PW anomalies accompanied by surfacc temperature anomalies.It means the increase of water vapor content is related to the increase of heat function in the epicenter area,which may be due to the strong volcanic activities prior to earthquake.关键词
GPS/水汽含量/地震/广东/新丰江水库Key words
GPS/Precipitable water vapor/Earthquake/Guangdong/Xinfengjiang reservoir分类
天文与地球科学引用本文复制引用
陈梅花,邓志辉,谭争光,刘吉平,韩玉兰,宋文杰..利用GPS观测资料反演水汽含量及地震异常初步探讨[J].华南地震,2017,37(1):8-16,9.基金项目
广东省省级科技计划项目(项目编号:2013B020200010)和国家自然科学基金项目(项目编号:40702056)资助. （项目编号:2013B020200010）
