Ventilation variability of Labrador Sea Water and its impact on oxygen and anthropogenic carbon: a review
Ventilation variability of Labrador Sea Water and its impact on oxygen and anthropogenic carbon: a review
复制标题
拉布拉多海水的通风变化及其对氧气和人为碳的影响：综述
DOI：
10.1098/rsta.2016.0321
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
I. Yashayaev
中科院分区：
文献类型：
--
作者：
M. Rhein;R. Steinfeldt;D. Kieke;I. Stendardo;I. Yashayaev
拉布拉多海水（LSW）的通风由于其与大西洋经向翻转环流（AMOC）强度的潜在关系而受到广泛关注。本文从Labrador海和47°N次极环流南缘的观测资料综述了LSW的变化。拉布拉多海冬季强烈的大气冷却导致了强烈而深刻的对流，产生了一个厚而致密的LSW层，例如，在20世纪90年代初到中期。随后几年的对流较弱，主要是低密度LSW的通风，也减少了氧气的供应。进一步的结果是，1996-1999年和2007-2010年两个时间段内，北大西洋亚极西部地区LSW对人为碳的吸收率下降。在东部盆地，人为碳的增加速率变大，主要是由于前几年通气的低气压平流延迟。从2013/2014年冬季开始，至少持续到2015/2016年冬季，密度更大、体积更大的LSW恢复生产。在北纬47°的西边界流中已经发现了氧增加的信号。在年代际和较短的时间尺度上，拉布拉多海上空的异常寒冷大气条件导致对流增强。在几十年的时间尺度上，气候模式预测的未来100年北大西洋亚极区的“冷团”与拉布拉多海较弱的AMOC和较弱的对流（因此脱氧）有关。这篇文章是“变暖世界中的海洋通风和脱氧”主题的一部分。
Ventilation of Labrador Sea Water (LSW) receives ample attention because of its potential relation to the strength of the Atlantic Meridional Overturning Circulation (AMOC). Here, we provide an overview of the changes of LSW from observations in the Labrador Sea and from the southern boundary of the subpolar gyre at 47° N. A strong winter-time atmospheric cooling over the Labrador Sea led to intense and deep convection, producing a thick and dense LSW layer as, for instance, in the early to mid-1990s. The weaker convection in the following years mostly ventilated less dense LSW vintages and also reduced the supply of oxygen. As a further consequence, the rate of uptake of anthropogenic carbon by LSW decreased between the two time periods 1996–1999 and 2007–2010 in the western subpolar North Atlantic. In the eastern basins, the rate of increase in anthropogenic carbon became greater due to the delayed advection of LSW that was ventilated in previous years. Starting in winter 2013/2014 and prevailing at least into winter 2015/2016, production of denser and more voluminous LSW resumed. Increasing oxygen signals have already been found in the western boundary current at 47° N. On decadal and shorter time scales, anomalous cold atmospheric conditions over the Labrador Sea lead to an intensification of convection. On multi-decadal time scales, the ‘cold blob’ in the subpolar North Atlantic projected by climate models in the next 100 years is linked to a weaker AMOC and weaker convection (and thus deoxygenation) in the Labrador Sea. This article is part of the themed issue ‘Ocean ventilation and deoxygenation in a warming world’.
登录
查看更多内容
1993 年至 2013 年期间通过弗拉芒山口输送的拉布拉多海水的变化
影响因子：
--
作者：
Schneider;D. Kieke;K. Jochumsen;E. Colbourne;I. Yashayaev;R. Steinfeldt;E. Varotsou;N. Serra;M. Rhein
通讯作者：
M. Rhein
影响因子：
64.8
作者：
Gulev, Sergey K.;Latif, Mojib;Koltermann, Klaus Peter
通讯作者：
Koltermann, Klaus Peter
影响因子：
18.3
作者：
Boening, Claus W.;Behrens, Erik;Bamber, Jonathan L.
通讯作者：
Bamber, Jonathan L.
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