Evaluation of the applicability of the Estimated State of the Global Ocean for Climate Research (ESTOC) data set
Evaluation of the applicability of the Estimated State of the Global Ocean for Climate Research (ESTOC) data set
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DOI：
10.1002/2015gl064538
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发表时间：
2015-06
影响因子：
5.2
通讯作者：
S. Osafune;S. Masuda;N. Sugiura;T. Doi
中科院分区：
文献类型：
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作者：
S. Osafune;S. Masuda;N. Sugiura;T. Doi
1957年至2011年期间，使用改进的准全球四维变分数据同化系统进行了长期数据合成实验，该系统最初是为了改善深海的表示而开发的，包括一种独特的异常同化方法。在太平洋中评估了由此产生的海洋状态估计的总体特征，该估计在没有任何人工热量和盐源或汇的情况下是动态一致的。结果表明，该数据集更好地代表了综合海洋状态：年际到数十年时间尺度上从海面到海底的水体分布和体积输送的平均状态以及时间变化的组成部分。这表明该数据集可用于检查整个深度范围内时间变化之间的相互作用，并且有助于理解海洋物理学及其在气候系统中的作用。
A long‐term data synthesis experiment was conducted for the period 1957–2011 using a modified quasi‐global four‐dimensional variational data assimilation system that was originally developed to improve the representation of the deep ocean, including a unique method for anomaly assimilation. The overall characteristics of the resulting ocean state estimate, which is dynamically consistent without any artificial sources or sinks for heat and salt, are evaluated in the Pacific Ocean. It is shown that the data set better represents the comprehensive ocean state: the mean state of the water mass distribution and volume transport and components of temporal variability from the sea surface to the bottom on interannual to multidecadal timescales. This suggests that the data set can be used to examine interactions between temporal variations throughout the entire depth range and is useful for understanding ocean physics and its role in the climate system.