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利用覆盖时间段为2004年1月至2009年10月共70个月的美国NASA和德国DLR联合研制的“重力场恢复与气候实验”卫星(GRACE)时变重力场数据,估计了非洲、中国以及亚马逊流域水储量的季节性变化。结果表明:非洲北部、南部、中国南部、亚马逊流域水储量变化的季节性幅度分别为10.5cm±2.1cm、16.2cm±2.9cm、8.3cm±1.5cm、30.5cm±5.6cm。研究证实了GRACE重力卫星在监测水质量变化,乃至于一个相对较小的区域的水质量变化方面的潜能。文章的结果有助于水资源管理以及预防和缓解灾害性事件等工作的决策;此外,改进的以监测地表质量变化、全球性气候改变、灾害性事件等为目标的GRACE类型的探测计划,将促进对水文学、海洋动力学以及地球物理学等的理解。
The gravity field data of GRACE (GRAC) developed jointly by NASA and Germany DLR covering a total period of 70 months from January 2004 to October 2009 were estimated. Seasonal changes in water reserves in China and the Amazon basin. The results show that seasonal changes of water reserves in the northern, southern, southern China and the Amazon basin are 10.5cm ± 2.1cm, 16.2cm ± 2.9cm, 8.3cm ± 1.5cm and 30.5cm ± 5.6cm respectively. The study confirms the potential of the GRACE gravity satellite to monitor water quality changes and even water quality changes in a relatively small area. The results of the paper contribute to decision-making on water resources management and prevention and mitigation of disastrous events; in addition, improved GRACE-type exploration programs that target the monitoring of surface quality changes, global climate change, catastrophic events, etc., Promote understanding of hydrology, ocean dynamics and geophysics.