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SSF-Svalbard Science Forum

Abrupt Holocene cooling episodes in Svalbard. A collaborative pilot study.

Tildelt: kr 0,40 mill.

The Arctic has warmed twice as rapidly as the rest of the Earth over the past century, and the North Atlantic sector of the Arctic is particularly sensitive to changes in the planetary energy balance and accompanying circulation changes. Glaciers and ice caps are now receding rapidly, and in optimal settings we expect they are revealing new archives of climatic change. Resent research from the Canadian Arctic has shown that rooted vegetation preserved beneath ice caps and now being exposed by widespread ice margin retreat can be dated precisely by radiocarbon to provide the most secure estimates of persistent snowline depressions in the past, as well as providing the most reliable estimates of the last time a site experienced summer temperatures similar to those of recent decades. As long as rooted plants are preserved, their radiocarbon ages will provide a longer perspective on contemporary summer warming than is possible from the short instrumental record. This pilot study will explore the possibility of dating recently exposed rooted tundra plants along optimal glacier margins on eastern Spitsbergen to test for sudden cooling episodes during the Holocene. The results will be used to explore linkages and climate gradients between the Baffin Bay region and the European Arctic, and to further develop international research collaboration.

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SSF-Svalbard Science Forum