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Thickness difference fields (left column) and temperature difference fields (right column) were constructed by subtracting thickness or temperature in two consecutive time frames at each 1-degree square in the North Atlantic. The thickness represents the LSW density layer and temperature values are taken at a density surface in the middle of that layer. Green-blue colors indicate layer thickening and/or cooling in one time frame compared to the previous time frame; yellow-red colors indicate layer thinning and/or warming.[back]
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