Does Net E − P Set a Preference for North Atlantic Sinking?
Does Net E − P Set a Preference for North Atlantic Sinking?
复制标题
Net E-P 是否会导致北大西洋下沉？
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
W. D. Ruijter
中科院分区：
文献类型：
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作者：
S. E. Huisman;H. Dijkstra;A. S. Heydt;W. D. Ruijter
现今全球纬向翻转环流（MOC）伴随着北大西洋深水（NADW）的形成，而北太平洋缺乏深水形成，这通常被认为是由于北太平洋盆地是净降水盆地，而北大西洋是净蒸发盆地的事实造成的。在本文中，作者研究了大陆几何形状和淡水通量的不对称性对理想化的二维模式和全球海洋模式中MOC的影响。本研究从多重均衡的角度来探讨这个问题，外部因素的不对称性限制了稳定MOC模式的存在。这两个多重均衡的角度来看，一个现实的全球几何使用的事实，增加了新的方面的问题。在全球模式中，它表明，净降水强迫大西洋可以有一个纬向翻转环流与北方下沉和海面盐度，类似于今天的盐度。
AbstractThe present-day global meridional overturning circulation (MOC) with formation of North Atlantic Deep Water (NADW) and the absence of a deep-water formation in the North Pacific is often considered to be caused by the fact that the North Pacific basin is a net precipitative, while the North Atlantic is a net evaporative basin. In this paper, the authors study the effect of asymmetries in continent geometry and freshwater fluxes on the MOC both in an idealized two-dimensional model and in a global ocean model. This study approaches the problem from a multiple equilibria perspective, where asymmetries in external factors constrain the existence of steady MOC patterns. Both this multiple equilibria perspective and the fact that a realistic global geometry is used add new aspects to the problem. In the global model, it is shown that the Atlantic forced by net precipitation can have a meridional overturning circulation with northern sinking and a sea surface salinity that resembles the present-day sali...