Submesoscale modulation of deep water formation in the Labrador Sea.
Submesoscale modulation of deep water formation in the Labrador Sea.
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DOI：
10.1038/s41598-020-74345-w
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发表时间：
2020-10-15
影响因子：
4.6
通讯作者：
Castelao RM
中科院分区：
文献类型：
--
作者：
Tagklis F;Bracco A;Ito T;Castelao RM
亚中尺度结构充满了海洋表面，最近的数值模拟和间接观测表明，它们可能延伸到海洋内部。然而，目前尚不清楚它们的影响在空间和时间上有多深远，从天气到气候的尺度。本文通过区域海洋模拟研究了伊明格洋流从大陆坡向拉布拉多海内部的输送路径和最终命运。亚中尺度过程通过控制沿西格陵兰形成的相干涡旋的特征来调节这种输送，进而调节拉布拉多海内部的分层。亚中尺度环流调节和控制了拉布拉多海对全球经向翻转的贡献，在格陵兰西海岸的时间平均近地面涡度和/或锋生倾向与对流水体积之间存在线性关系。这项研究对拉布拉多海对MOC状态的总体控制作用较小的观点提出了质疑，该观点是通过对最近的opsnap（亚极地北大西洋翻转计划）数据的分析得出的，与气候模式的估计相比较。它还证实了亚中尺度湍流与气候的相关性，指出了将其平流贡献纳入地球系统模型的紧迫性。
Submesoscale structures fill the ocean surface, and recent numerical simulations and indirect observations suggest that they may extend to the ocean interior. It remains unclear, however, how far-reaching their impact may be—in both space and time, from weather to climate scales. Here transport pathways and the ultimate fate of the Irminger Current water from the continental slope to Labrador Sea interior are investigated through regional ocean simulations. Submesoscale processes modulate this transport and in turn the stratification of the Labrador Sea interior, by controlling the characteristics of the coherent vortices formed along West Greenland. Submesoscale circulations modify and control the Labrador Sea contribution to the global meridional overturning, with a linear relationship between time-averaged near surface vorticity and/or frontogenetic tendency along the west coast of Greenland, and volume of convected water. This research puts into contest the lesser role of the Labrador Sea in the overall control of the state of the MOC argued through the analysis of recent OSNAP (Overturning in the Subpolar North Atlantic Program) data with respect to estimates from climate models. It also confirms that submesoscale turbulence scales-up to climate relevance, pointing to the urgency of including its advective contribution in Earth systems models.
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影响因子：
16.6
作者：
Callies J;Ferrari R;Klymak JM;Gula J
通讯作者：
Gula J
影响因子：
3.5
作者：
Boccaletti, Giulio;Ferrari, Raffaele;Fox-Kemper, Baylor
通讯作者：
Fox-Kemper, Baylor
影响因子：
3.5
作者：
Capet, X.;Mcwilliams, J. C.;Shchepetkin, A. F.
通讯作者：
Shchepetkin, A. F.
影响因子：
3.2
作者：
Bracco, Annalisa;Choi, Jun;McWilliams, James C.
通讯作者：
McWilliams, James C.
影响因子：
18.3
作者：
Boening, Claus W.;Behrens, Erik;Bamber, Jonathan L.
通讯作者：
Bamber, Jonathan L.