A change in the freshwater balance of the Atlantic Ocean over the past four decades

Ruth Curry; Bob Dickson; Igor Yashayaev

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A change in the freshwater balance of the Atlantic Ocean over the past four decades

机译：过去四年中大西洋淡水平衡的变化

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The oceans are a global reservoir and redistribution agent for several important constituents of the Earth's climate system, among them heat, fresh water and carbon dioxide. Whereas these constituents are actively exchanged with the atmosphere, salt is a component that is approximately conserved in the ocean. The distribution of salinity in the ocean is widely measured, and can therefore be used to diagnose rates of surface freshwater fluxes, freshwater transport and local ocean mixing-important components of climate dynamics. Here we present a comparison of salinities on a long transect (50°S to 60°N) through the western basins of the Atlantic Ocean between the 1950s and the 1990s. We find systematic freshening at both poleward ends contrasted with large increases of salinity pervading the upper water column at low latitudes. Our results extend a growing body of evidence indicating that shifts in the oceanic distribution of fresh and saline waters are occurring worldwide in ways that suggest links to global warming and possible changes in the hydrologic cycle of the Earth.

机译：海洋是地球气候系统中几个重要组成部分的全球性水库和再分配代理，其中包括热量，淡水和二氧化碳。这些成分可以与大气积极地交换，而盐则是大约在海洋中保存的一种成分。海洋中盐度的分布得到了广泛的测量，因此可用于诊断地表淡水通量，淡水运输和局部海洋混合的速率，这是气候动力学的重要组成部分。在这里，我们对1950年代至1990年代穿越大西洋西海盆的长样带（50°S至60°N）上的盐度进行了比较。我们发现，在低纬度时，两极的两端都有系统的新鲜度，而上层水柱的盐度却大大增加。我们的结果提供了越来越多的证据，表明全世界淡水和盐水的海洋分布正在发生变化，这些变化表明与全球变暖和地球水文循环可能发生变化有关。

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来源
《Nature》 |2003年第6968期|p.826-829|共4页
作者
Ruth Curry; Bob Dickson; Igor Yashayaev;
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作者单位

Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类自然科学总论;
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A change in the freshwater balance of the Atlantic Ocean over the past four decades

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