GEOPHYSICAL RESEARCH LETTERS, VOL. 30, NO. 3, 1132, doi:10.1029/2002GL015797, 2003

Recent cooling in coastal southern Greenland and relation with the North Atlantic Oscillation

Edward Hanna
Institute of Marine Studies, University of Plymouth,

John Cappelen
Danish Meteorological Institute,
Copenhagen, Denmark


[1] Analysis of new data for eight stations in coastal southern Greenland, 19582001, shows a significant cooling (trend-line change -1.29C for the 44 years), as do sea-surface temperatures in the adjacent part of the Labrador Sea, in contrast to global warming (+0.53C over the same period). The land and sea temperature series follow similar patterns and are strongly correlated but with no obvious lead/lag either way. This cooling is significantly inversely correlated with an increased phase of the North Atlantic Oscillation (NAO) over the past few decades (r = -0.76), and will probably have significantly affected the mass balance of the Greenland Ice Sheet.

Received 3 July 2002; revised 11 September 2002; accepted 11 September 2002; published 12 February 2003.