利用多源数据分析亚马逊流域水储量异常变化  

Analysis of water storage change in Amazon Basin based on multi-source data

作　　者：向舰 王正涛[1] 田坤俊 XIANG Jian;WANG Zhengtao;TIAN Kunjun(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,武汉430079

出　　处：《测绘科学》2022年第3期116-121,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41774019,41974007,41474018)。

摘　　要：针对GRACE卫星在2017年停止工作后,难以对地表浅层进行长期且连续的水储量评估的问题,该文引入Swarm星群观测,通过与GRACE、GRACE-FO和GLDAS土壤水文模型比较,较高的相关系数验证了Swarm卫星具有用于探测亚马逊流域水储量变化的潜力,可用于填补GRACE与GRACE-FO之间的测量空白期。本文联合GRACE卫星与Swarm、GRACE-FO卫星,反演了亚马逊流域2010年1月—2020年7月共127个月的陆地水储量,并得到了亚马逊流域10a时间尺度陆地水储量的年变化趋势。研究结果表明:亚马逊流域水储量趋势变化在2015年后干旱趋势可能会加剧,在2019—2020出现了亚马逊流域陆地水储量异常低值现象,此次事件伴随着降水的异常减少和温度的异常升高,被认为是继2015—2016年干旱事件后发生的又一次干旱事件。Since GRACE satellites were out of service in 2017,it was difficult to carry out long-term and continuous terrestrial water storage assessment for the shallow surface of earth,the Swarm observations were introduced in this papaer,compared with GRACE,GRACE-FO and GLDAS soil hydrological models,the strong correlation coefficients verified that Swarm satellites had the potential to detect the change of water storage in the Amazon basin,and could be used to fill the measurement gap between GRACE and GRACE-FO.The terrestrial water storages of Amazon basin in 127months from January 2010to July 2020 were retrieved by combining GRACE satellites with Swarm,GRACE-FO satellites data,this paper also analyzed the annual variation trend of terrestrial water storage in the Amazon region on a 10-year time scale.The results showed:the terrestrial water storage trend changes in the Amazon showed that drought may intensify after 2015,the abnormal low value of terrestrial water storage in the Amazon basin was found in 2019-2020.Accompanied by the abnormal decrease of precipitation and the abnormal increase of temperature,this event was considered to be another drought event after the drought event in 2015-2016.

关 键 词：重力场恢复和气候实验卫星 重力场恢复和气候实验后续任务卫星 Swarm卫星 陆地水储量 降水 温度 

分 类 号：P228[天文地球—大地测量学与测量工程]