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The Arctic Ocean: Physical Processes and their Effects on Climate and the Ecosystem
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Rapidly Changing Arctic Climate System and Arctic-Midlatitude
Climate and Weather Linkages
Wednesday 9th @ 0950-1010, Conference Room 5
Xiangdong Zhang* , International Arctic Research Center and Department of Atmospheric Sciences, University of Alaska Fairbanks
Presenter Email: xzhang9@alaska.edu |
| Rapid climate change has occurred in the Arctic, which is representatively indicated by a decade-long accelerated decline of sea ice extent and volume and an amplified warming trend at a rate of almost twice the global average. Along with these changes, extreme climate events of sea ice cover loss also occurred in summer 2007, 2012, and 2016. At the same time, dramatic changes have also occurred in broader areas of the Northern Hemisphere, including a spatial shift of the maximum surface air temperature warming trends from the Eurasian continent to the central Arctic Ocean, an enhancement of poleward oceanic and atmospheric heat transport from either the North Atlantic or North Pacific Ocean into the Arctic, a poleward shift of storm tracks and an intensification of Arctic storm activities, and a widespread of extreme cold weather and snow storms from the US east coast to Europe and Asia. Many aspects of these changes are obviously beyond the scope of conventional climate fluctuations, and also could not be solely accounted for by greenhouse-gas-emissions forcing. In this presentation, we will introduce our research progresses integrated from data analysis and model simulations towards improving systematic understanding of the rapid changes in the Arctic and the enhanced linkage between Arctic and midlatitude climate and weather. The recent strong debates on Arctic impact on midlatitude climate and weather will be highlighted. |
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