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      Little Ice Age cold interval in West Antarctica: Evidence from borehole temperature at the West Antarctic Ice Sheet (WAIS) Divide : WAIS DIVIDE TEMPERATURE

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      Geophysical Research Letters

      American Geophysical Union (AGU)

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          Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year.

          Assessments of Antarctic temperature change have emphasized the contrast between strong warming of the Antarctic Peninsula and slight cooling of the Antarctic continental interior in recent decades. This pattern of temperature change has been attributed to the increased strength of the circumpolar westerlies, largely in response to changes in stratospheric ozone. This picture, however, is substantially incomplete owing to the sparseness and short duration of the observations. Here we show that significant warming extends well beyond the Antarctic Peninsula to cover most of West Antarctica, an area of warming much larger than previously reported. West Antarctic warming exceeds 0.1 degrees C per decade over the past 50 years, and is strongest in winter and spring. Although this is partly offset by autumn cooling in East Antarctica, the continent-wide average near-surface temperature trend is positive. Simulations using a general circulation model reproduce the essential features of the spatial pattern and the long-term trend, and we suggest that neither can be attributed directly to increases in the strength of the westerlies. Instead, regional changes in atmospheric circulation and associated changes in sea surface temperature and sea ice are required to explain the enhanced warming in West Antarctica.
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            The Ocean Circulation Inverse Problem

             Carl Wunsch (1996)
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              Temperature, accumulation, and ice sheet elevation in central Greenland through the last deglacial transition

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                Author and article information

                Journal
                Geophysical Research Letters
                Geophys. Res. Lett.
                American Geophysical Union (AGU)
                00948276
                May 2012
                May 2012
                : 39
                : 9
                : n/a
                Article
                10.1029/2012GL051260
                © 2012
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