Measuring the Distribution of Ocean Mass Using GRACE
Measuring the Distribution of Ocean Mass Using GRACE
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DOI：
10.1007/978-94-017-1333-7_28
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发表时间：
2003-07
影响因子：
10.3
通讯作者：
R. Nerem;J. Wahr;E. Leuliette
中科院分区：
文献类型：
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作者：
R. Nerem;J. Wahr;E. Leuliette
重力恢复和气候实验（GRACE）3月17日成功发射。2002.有可能在卫星海洋学方面创造一种新的范例，其影响可能与1992年通过TOPEX/Posidon（T/P）进行的精确卫星测高所观察到的影响一样大。这里提出的模拟表明，GRACE将能够监测全球海洋质量的非长期变化，空间分辨率为~500公里，精度为~3毫米水当量。应该可以将全球平均海洋质量变化恢复到约1毫米的精度，如果可以减少大气压力模型误差，可能会更好。我们还没有考虑到由于时间混叠和长期重力变化而可能产生的可能的重大误差。来自冰川均衡调整和极地冰体融化的长期信号预计将相当大，并将使长期海洋质量变化的恢复复杂化。然而，GRACE将提供前所未有的海平面变化质量分量的洞察力，特别是当与同步卫星高度计测量相结合时。在这些问题上取得的进展将为了解海平面对气候变化的反应提供新的见解。
The Gravity Recovery and Climate Experiment (GRACE). which was successfully launched March 17. 2002. has the potential to create a new paradigm in satellite oceanography with an impact perhaps as large as was observed with (he arrival of precision satellite altimetry via TOPEX/Poscidon (T/P) in 1992. The simulations presented here suggest that GRACE will be able to monitor non-secular changes in ocean mass on a global basis with a spatial resolution of ~500 km and an accuracy of ~3 mm water equivalent. it should be possible to recover global mean ocean mass variations to an accuracy of ~1 mm, possibly much better if the atmospheric pressure modeling errors can be reduced. We have not considered the possibly significant errors that may arise due to temporal aliasing and secular gravity variations. Secular signals from glacial isostatic adjustment and the melting of polar ice mass arc expected to he quite large, and will complicate the recovery of secular ocean mass variations, Nevertheless, GRACE will provide unprecedented insight into the mass components of sea level change, especially when combined with coincident satellite altimeter measurements. Progress on these issues would provide new insight into the response of sea level to climate change.