Monitoring open‐ocean deep convection from space
Monitoring open‐ocean deep convection from space
复制标题
从太空监测公海深对流
DOI：
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复制
发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Béranger
中科院分区：
文献类型：
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作者：
M. Herrmann;J. Bouffard;K. Béranger
深对流是海洋环流中的一个关键过程，受气候变化的影响，现场监测成本较高。我们的研究是从太空监测DC的第一步：我们调查了使用改进的卫星测高技术观测其变异性的可行性。对1999-2007年期间的地中海环流进行了海洋模拟。DC年际变化被真实地模拟，海面高程(SSE)与测高数据相一致。数值结果表明，年直流特征与冬季SSE有很强的相关性。在此基础上，我们提出了一种利用测高资料监测DC年际变化和长期演变的方法。我们的方法应用于现有最长的高度计系列，正确地反映了1994年至2007年地中海西北部地区DC的年际变化。
Deep convection (DC) is a key‐process of the oceanic circulation, costly to monitor in situ and under the influence of climate change. Our study is a first step toward monitoring DC from space: we investigate the feasibility of observing its variability using improved satellite altimetry. An oceanic simulation of the Mediterranean circulation was performed for the 1999–2007 period. DC interannual variability is realistically modelled, and the sea surface elevation (SSE) is in agreement with altimetry data. Numerical results show a strong correlation between the annual DC characteristics and the winter SSE. From that, we propose a method to monitor DC interannual variability and long term evolution using altimetry data. Our method, applied to the longest available altimetry series, represents correctly the interannual variability of DC in the Northwestern Mediterranean between 1994 and 2007.