Analysis of seasonal ocean bottom pressure variability in the Gulf of Thailand from GRACE
Analysis of seasonal ocean bottom pressure variability in the Gulf of Thailand from GRACE
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DOI：
10.1016/j.gloplacha.2010.08.002
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发表时间：
2010-11
影响因子：
3.9
通讯作者：
B. Wouters;D. Chambers
中科院分区：
文献类型：
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作者：
B. Wouters;D. Chambers
自 2002 年推出以来，重力恢复和气候实验 (GRACE) 已被证明是检索大规模海底压力变化的宝贵工具。在本文中，我们证明 GRACE 卫星能够监测泰国湾的小规模水体变化。我们发现与质量相关的变化主导着该地区的海平面。检测到强烈的季节性周期，振幅约为 20 厘米，在一月初达到峰值。这与卫星测高和附近验潮站的观测结果非常吻合。用于 GRACE 观测背景处理的斜压海洋环流和潮汐模型可以很好地再现观测的时间行为，但低估了信号强度约 30%。这证明了 GRACE 数据的附加值及其改进某些区域数值海洋模型的潜力。
Since its launch in 2002, the Gravity Recovery and Climate Experiment (GRACE) has proven to be an invaluable tool to retrieve large scale ocean bottom pressure variations. In this article, we demonstrate that GRACE satellites are able to monitor small scale water mass variations in the Gulf of Thailand. We find that mass related variations dominate sea level in this region. A strong seasonal cycle is detected with an amplitude of approximately 20cm, peaking in early January. This agrees very well with observations from satellite altimetry and a near-by tide gauge station. The baroclinic Ocean Model for Circulation and Tides, used in the background processing of the GRACE observations, reproduces the temporal behavior of the observations well, but underestimates the power of the signal by about 30%. This demonstrates the added value of the GRACE data and their potential to improve numerical ocean models in certain regions.