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By Lin Li

Abstract

The climatic significance of Greenland is determined by two main facts: the thermal forcing of its ice sheet and its topographic forcing near the middle of the North Atlantic storm track. The Greenland Ice Sheet boasts about 10 percent of the world’s freshwater and its melting contributes about 7 percent of the annual rise in global sea level. This study explores the connection between cyclone activity around Greenland and Rogers ’ (1984) NAO monthly and seasonal indices. Serreze’s (1995) storm tracking algorithm is optimized to track cyclones over Denmark Strait and along the west coast of Greenland using both the ECMWF Reanalysis mean sea level pressure field from 1979 to 1993 (ERA-15) and the ECMWF TOGA high resolution mean sea level pressure field from 1985 to 2000. It is found that cyclone activity along Denmark Strait is highly correlated with NAO indices, especially in winter. There are more cyclones passing Denmark Strait and more cyclogenesis in positive NAO months or seasons. These cyclones are more intense and their deepening rates are larger in comparison to those in negative NAO months or seasons. Along the west coast of Greenland, due to the differen

Year: 2016
OAI identifier: oai:CiteSeerX.psu:10.1.1.927.7633
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