Continuous Estimate of Atlantic Oceanic Freshwater Flux at 26.5°N
Continuous Estimate of Atlantic Oceanic Freshwater Flux at 26.5°N
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DOI：
10.1175/jcli-d-14-00519.1
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发表时间：
2015-11
影响因子：
4.9
通讯作者：
Elaine;-L.;Mcdonagh;Brian;-A.;King;Harry;Bryden;P. Courtois;Z. Szuts;Molly O'Neil Baringer;Stuart;Cunningham;Chris Atkinson
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文献类型：
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作者：
Elaine;-L.;Mcdonagh;Brian;-A.;King;Harry;Bryden;P. Courtois;Z. Szuts;Molly O'Neil Baringer;Stuart;Cunningham;Chris Atkinson
第一次对26.5°N淡水通量的连续估计是利用2004年4月至2012年10月每10天一次的快速MOCHA-西部边界时间序列(WBTS)和ARGO浮标的观测计算得出的。淡水通量(FW)的平均正负标准差为−1.17±0.20Sv(1 Sv≡106m~3 S−1；负通量向南)，表明白令海峡与北纬26.5°N之间的淡水辐散为−0.37±0.20Sv，这意味着向海洋输入0.37Sv的淡水，这与降水主导蒸发的地区是一致的。淡水辐散的符号和变异性主要由翻转分量(−0.78±0.21Sv)决定。淡水散度的水平分量较小，变率较小，为正(0.35±0.04 Sv)。在经向翻转环流强度和淡水通量之间存在线性关系(−0…
AbstractThe first continuous estimates of freshwater flux across 26.5°N are calculated using observations from the RAPID–MOCHA–Western Boundary Time Series (WBTS) and Argo floats every 10 days between April 2004 and October 2012. The mean plus or minus the standard deviation of the freshwater flux (FW) is −1.17 ± 0.20 Sv (1 Sv ≡ 106 m3 s−1; negative flux is southward), implying a freshwater divergence of −0.37 ± 0.20 Sv between the Bering Strait and 26.5°N. This is in the sense of an input of 0.37 Sv of freshwater into the ocean, consistent with a region where precipitation dominates over evaporation. The sign and the variability of the freshwater divergence are dominated by the overturning component (−0.78 ± 0.21 Sv). The horizontal component of the freshwater divergence is smaller, associated with little variability and positive (0.35 ± 0.04 Sv). A linear relationship, describing 91% of the variance, exists between the strength of the meridional overturning circulation (MOC) and the freshwater flux (−0....