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Cooling and freshening of the subpolar North Atlantic Ocean since the 1960's Read, J.F.; Gould, W.J. (1992). Cooling and freshening of the subpolar North Atlantic Ocean since the 1960's. Nature (Lond.) 360(6399): 55-57 In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer

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Beschikbaar in	Auteurs
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Trefwoorden

AN, North Atlantic Data > Hydrographic data > Salinity data Data > Temperature data Motion > Water motion > Circulation > Water circulation > Ocean circulation > Thermohaline circulation Temporal variations > Long-term changes Water masses North Atlantic Ocean [Marine Regions] Marien/Kust

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Auteurs		Top
Read, J.F. Gould, W.J.

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Abstract

Little is known of the interdecadal variability in the thermohaline circulation of the world's oceans, yet such knowledge is essential as a background to studies of the effects of natural and anthropogenic climate change. The subpolar North Atlantic is an area of extensive water mass modification by heat loss to the atmosphere. Lying as it does at the northern limit of the global thermohaline "conveyor belt", changes in this region may ultimately have global consequences. Here we report that in August 1991 the waters between Greenland and the United Kingdom were on average 0.08°C and 0.15 °C colder than in 1962 and 1981, respectively, and slightly less saline than in 1962. The cause appears to be renewed formation of intermediate water in the Labrador Sea from cooler and fresher source waters, and the spreading of this water mass from the west. Variations in the source characteristics of Labrador Sea Water can be traced across the North Atlantic, with a circulation time of 18-19 years between the Labrador Sea and Rockall Trough. More recently formed Labrador Sea Water, with even lower temperature and salinity, should cool and freshen the North Atlantic still further as it circulates around the ocean in the coming decade.

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