Recurrent replenishment of Labrador Sea Water and associated decadal‐scale variability
Recurrent replenishment of Labrador Sea Water and associated decadal‐scale variability
复制标题
拉布拉多海水的周期性补充和相关的十年尺度变化
DOI：
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Loder
中科院分区：
文献类型：
--
作者：
I. Yashayaev;J. Loder
2015年，拉布拉多海冬季对流翻转的最大深度达到了1700米--这是自1994年以来的最深深度--由此产生的拉布拉多海水“年份级”是20世纪90年代初以来观察到的最深、最厚的深度之一。近几十年来，Argo浮标、年度调查和系泊测量提供了拉布拉多海地区重要的季节、年际和较长期LSW变率的前所未有的视角。在2002-2015年的“逃离德黑兰”期间，相对强对流年的冬季石斑石平均体积比相对弱对流年大约70%。然而，从冬季到秋季的LSW消失量要大180%，这表明在相对强和弱对流年之间，该区域潜在的LSW出口率相差2.8倍。间歇性重复的深对流是造成最低层中深度温度、盐度和密度的主要十年尺度变化的原因，并对北大西洋次极地和潜在的大西洋经向翻转环流的十年尺度变化产生影响。对秋冬冷季LS海洋热含量变化和累积地表热损失的比较表明，至少部分与北大西洋涛动有关的异常强烈的冬季大气冷却仍然是反复对流的主要驱动力。这篇文章受版权保护。版权所有。
Winter convective overturning in the Labrador Sea reached an “aggregate” maximum depth of 1700m in 2015 – the deepest since 1994 – with the resulting Labrador Sea Water (LSW) “year class” being one of the deepest and thickest observed outside of the early 1990s. Argo float, annual survey and moored measurements in recent decades provide an unprecedented view of important seasonal, interannual and longer-term LSW variability in the Labrador Sea region. During the 2002-2015 “Argo” era, the average winter LSW pycnostad volume was about 70% larger in relatively strong convection years than in relatively weak ones. However, the winter-to-fall LSW disappearance volume was 180% larger, pointing to a factor of 2.8 difference in the potential LSW export rates from the region between relatively strong and weak convection years. Intermittently recurrent deep convection is contributing to predominant decadal-scale variations in intermediate-depth temperature, salinity and density in the LS, with implications for decadal-scale variability across the subpolar North Atlantic and potentially in the Atlantic Meridional Overturning Circulation. Comparison of the LS ocean heat content changes and cumulative surface heat losses during the fall-winter cooling seasons indicates that anomalously strong winter atmospheric cooling, associated at least in part with the North Atlantic Oscillation, is continuing to be a major forcing of the recurrent convection. This article is protected by copyright. All rights reserved.
北大西洋副热带和副极地热含量和温跃层变化机制
影响因子：
4.9
作者：
Roussenov V
通讯作者：
Roussenov V
北大西洋深水从拉布拉多海到南半球的平流
影响因子：
--
作者：
Steinfeldt
通讯作者：
Steinfeldt
DOI：
10.1016/j.dsr2.2010.10.061
发表时间：
2011-09-01
影响因子：
3
作者：
Rhein, Monika;Kieke, Dagmar;Yashayaev, Igor
通讯作者：
Yashayaev, Igor