Summer snow extent heralding of the winter North Atlantic Oscillation

Details Summer snow extent heralding of the winter North Atlantic Oscillation Summer snow extent heralding of the winter North Atlantic Oscillation

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30g..31s&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 7, pp. 31-1, CiteID 1378, DOI 10.1029/2002GL016832

Physics

24

Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Climatology (1620), Oceanography: General: Climate And Interannual Variability (3309)

Scientific paper

Winter climate over the North Atlantic and European sector is modulated by the North Atlantic Oscillation (NAO). We find that the summer extent of snow cover over northern North America and northern Eurasia is linked significantly (p < 0.01) to the upcoming winter NAO state. Summers with high/low snow extent precede winters of low/high NAO index phase. We suggest the linkage arises from the summer snow-associated formation of anomalous longitudinal differences in surface air temperature with the subpolar North Atlantic. Our findings indicate the seasonal predictability of North Atlantic winter climate may be higher and extend to longer leads than thought previously.

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