GRACE监测青藏高原及邻区陆地水储量变化结果的可变性

发布时间：2018-01-26 03:27

本文关键词： 青藏高原 GRACE 滤波陆地水储量变化可变性　出处：《大地测量与地球动力学》2017年03期 　论文类型：期刊论文

【摘要】：结合4种不同的去相关滤波和2种平滑滤波,利用5组GRACE数据反演了青藏高原及邻区陆地水储量变化趋势,研究了结果的可变性。结果表明,采用SW(P2M8)变宽度滑动窗口去条带效果较好,其结果中的湖水、冰川信号与卫星测高观测的信号位置具有较好的一致性。高斯滤波的异常幅值与扇形滤波相差10%~30%,平滑处理后异常幅值减少,观测分辨率降低,部分湖和冰川信号甚至消失。CSR/GFZ/JPL重力场模型反演的结果相近,但CSR去条带效果最好;JPL质量模型MAS/MAS_S的结果也相近,但在高原西部有较大差异。重力场模型与质量模型的结果相差很大。在利用GRACE卫星监测本地区陆地水储量变化时,推荐使用SW(P2M8)去条带滤波器、CSR重力场模型数据。
[Abstract]:Combined with four different kinds of de-correlation filtering and two kinds of smoothing filtering, five sets of GRACE data were used to invert the change trend of land water reserves in the Qinghai-Xizang Plateau and its adjacent areas, and the variability of the results was studied. SWP2M8) is used to remove the strip with variable width sliding window, and the result is the lake water. The location of glacial signal is consistent with that of satellite altimetry observation. The abnormal amplitude of Gao Si filter is 10 / 30 different from that of sector filter. After smooth processing, the abnormal amplitude decreases and the observation resolution decreases. Some lake and glacier signals even disappear. The inversion results of CSR / GFZ / JPL gravity field model are similar, but CSR strip removal is the best. The results of JPL quality model MAS/MAS_S were similar. But there is a big difference in the western plateau. The results of the gravity field model and the mass model are very different. The GRACE satellite is used to monitor the land water reserves in this area. SWT P 2 M 8) strip filter is recommended for CSR gravity field model data.
【作者单位】：中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室;中国科学院大学;地壳运动监测工程研究中心;
【基金】：国家自然科学基金(41431070,41174016,41274026,41204013) 国家重点基础研究发展计划(2012CB957703) CAS/SAFEA国际合作项目创新研究团队(KZZD-EW-TZ-05)~~
【分类号】：P223;P332
【正文快照】： 青藏高原是全球中低纬度地区最大的现代冰川区,对气候变化非常敏感。利用GRACE卫星重力反演青藏高原及其邻区陆地水储量变化(terrestrial water storage change,TWSC),分离水文循环要素,对水资源管理、全球变化研究具有重要意义[1]。反演TWSC一般利用发布的二级数据,即重力场

【相似文献】