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Multidecadal Variability of North Atlantic Temperature and Salinity during the Twentieth Century
- Article from:
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Journal of Climate
- Article date:
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November 1, 2005
- Author:
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Copyright informationCopyright American Meteorological Society Nov 1, 2005. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Substantial changes occurred in the North Atlantic during the twentieth century. Here the authors demonstrate, through the analysis of a vast collection of observational data, that multidecadal fluctuations on time scales of 50-80 yr are prevalent in the upper 3000 m of the North Atlantic Ocean. Spatially averaged temperature and salinity from the 0-300- and 1000-3000-m layers vary in opposition: prolonged periods of cooling and freshening (warming and salinification) in one layer are generally associated with opposite tendencies in the other layer, consistent with the notion of thermohaline overturning circulation. In the 1990s, widespread cooling and freshening was a dominant ...
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