Observing seasonal bottom pressure variability in the North Pacific with GRACE
Observing seasonal bottom pressure variability in the North Pacific with GRACE
复制标题
使用 GRACE 观测北太平洋季节性底部压力变化
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Hughes
中科院分区：
文献类型：
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作者：
R. Bingham;C. Hughes
利用GRACE的月度重力场解和海洋模式的输出，我们评估了GRACE观测北太平洋海底压力季节性变化的能力。首先，在海洋模式的背景下描述了北太平洋长期平均季节性海底压力循环的空间结构和时间演变。结果表明，基于模型输出的有限子集的平均季节周期对应于形成GRACE月度解的区间，是这种长期季节周期的代表。因此，得出的结论是，季节周期的显著特征应该出现在GRACE数据中。海洋模型与GRACE对海底压力季节循环的估计之间存在一致性，从而证明了GRACE作为研究海洋动力学的工具的价值。
Using monthly gravity field solutions from GRACE together with output from an ocean model we assess the ability of GRACE to observe seasonal ocean bottom pressure variability in the North Pacific. First, the spatial structure and temporal evolution of the long‐term mean seasonal bottom pressure cycle in the North Pacific is characterised in the context of the ocean model. It is then shown that a mean seasonal cycle based on a limited subset of the model output corresponding to the intervals over which the GRACE monthly solutions were formed is representative of this long‐term seasonal cycle. It is therefore concluded that the significant features of the seasonal cycle should be present in the GRACE data. Agreement is found between the ocean model and GRACE estimates of the bottom pressure seasonal cycle, thus demonstrating the worth of GRACE as a tool for studying ocean dynamics.