Decadal Evolution of Ocean Thermal Anomalies in the North Atlantic: The Effects of Ekman, Overturning, and Horizontal Transport
Decadal Evolution of Ocean Thermal Anomalies in the North Atlantic: The Effects of Ekman, Overturning, and Horizontal Transport
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北大西洋海洋热异常的年代际演化：埃克曼、翻转和水平输送的影响
DOI：
10.1175/jcli-d-12-00234.1
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发表时间：
2014
影响因子：
4.9
通讯作者：
Roussenov V
中科院分区：
文献类型：
--
作者：
Roussenov V
北大西洋盆地尺度的热异常，延伸至1-2公里深处，比过去60年的背景变暖更为明显。一项基于1965年至2000年历史数据重新分析的动力学分析表明，这些热异常是由海洋热辐合形成的，并受到鲜为人知的海气通量的增强。热辐合分为水平环流和经向翻转环流（MOC）贡献，经向翻转环流进一步分为Ekman和MOC输运减去Ekman输运（MOC-Ekman）单体。副热带热异常主要受风致Ekman热辐合变化控制，次极热异常主要受MOC-Ekman热辐合控制；水平热辐合一般较弱，仅在次极环流内变得明显。这些热异常通常在副热带和次极环流之间具有相反的标志，与驱动Ekman和MOC-Ekman热辐合的经向体积输送的相反变化有关。热输运中环流尺度辐合的这些变化可能是由风引起的，因为它们与环流边界的纬向风应力有关。
Basin-scale thermal anomalies in the North Atlantic, extending to depths of 1–2 km, are more pronounced than the background warming over the last 60 years. A dynamical analysis based on reanalyses of historical data from 1965 to 2000 suggests that these thermal anomalies are formed by ocean heat convergences, augmented by the poorly known air–sea fluxes. The heat convergence is separated into contributions from the horizontal circulation and the meridional overturning circulation (MOC), the latter further separated into Ekman and MOC transport minus Ekman transport (MOC-Ekman) cells. The subtropical thermal anomalies are mainly controlled by wind-induced changes in the Ekman heat convergence, while the subpolar thermal anomalies are controlled by the MOC-Ekman heat convergence; the horizontal heat convergence is generally weaker, only becoming significant within the subpolar gyre. These thermal anomalies often have an opposing sign between the subtropical and subpolar gyres, associated with opposing changes in the meridional volume transport driving the Ekman and MOC-Ekman heat convergences. These changes in gyre-scale convergences in heat transport are probably induced by the winds, as they correlate with the zonal wind stress at gyre boundaries.
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DOI：
10.1016/0011-7471(75)90046-7
发表时间：
1975-09
期刊：
Deep Sea Research and Oceanographic Abstracts
影响因子：
--
作者：
David Anderson;A. E. Gill
通讯作者：
David Anderson;A. E. Gill
环流变化对季节性和年际时间尺度上大西洋储热率的重要性
影响因子：
4.9
作者：
C. Piecuch;R. Ponte
通讯作者：
R. Ponte
影响因子：
5.2
作者：
Bingham, Rory J.;Hughes, Chris W.;Williams, Richard G.
通讯作者：
Williams, Richard G.
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
影响因子：
18.3
作者：
Lozier, M. Susan;Roussenov, Vassil;Williams, Richard G.
通讯作者：
Williams, Richard G.