GRACE卫星的冰川消融与水储量变化探讨  

Correlation analysis between the glacier melting and regional water storage change based on GRACE satellite

作　　者：聂琳娟[1,2] 超能芳[2] 晁定波[2] 

机构地区：[1]湖北水利水电职业技术学院,武汉430070 [2]武汉大学测绘学院,武汉430079

出　　处：《测绘科学》2016年第8期82-86,169,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41274032;41474018);武汉大学地球空间环境与大地测量教育部重点实验室开放基金资助项目(14-02-04)

摘　　要：针对青藏高原地区的冰川消融会影响发源于该地区的长江流域水储量变化这一情况,该文对二者的相关性进行深入研究。基于GRACE卫星2004—2010年重力数据,联合水文模型,利用水量平衡法,计算得到青藏高原地区冰川消融的平均速率为0.369cm/a,表明青藏高原冰川正在以较大速率消融;进而反演建立青藏高原和长江流域两个区域质量变迁的时间序列,计算得到两个区域的平均变化速率分别为-0.095cm/a和0.381cm/a,表明青藏高原地区的质量在以缓慢的速率减少,而长江流域水储量具有逐年增加的趋势且变化速率更大;最后通过分析计算结果,得出青藏高原地区冰川消融对长江流域水储量变化的贡献占其整个水量变化的20%。Glacial melt at Tibet Plateau plays a very important role in water storage variation of Yangtze River basin that originates in this region.So coherence analysis between them is an urgent need.Based on gravity data of GRACE satellite from 2004 to 2010together with hydrological model,using the water balance method,the average glacial melt rate at Tibet Plateau region was got as 0.369cm/a,suggesting a large melting rate for the glacier at Tibet Plateau.Time series of mass changes for Tibet Plateau and Yangtze River Basin were inverted with their average variation rate estimated to be-0.095cm/a and 0.381cm/a respectively,showing mass in Tibet Plateau region was decreasing slowly while water storage at Yangtze basin was increasing with an accelerating rate.At last,correlation between glacial melt at Tibet Plateau and water storage change in Yangtze River basin was detected based on the results obtained above.It was shown that glacial melt at Tibet Plateau contributed 20% of water storage variation in Yangtze River basin.

关 键 词：冰川消融 水储量变化 相关性分析 水量平衡法 GRACE卫星 

分 类 号：P208[天文地球—地图制图学与地理信息工程]