The interdecadal variation of spring Greenland sea ice extent and its relationships with the North Atlantic and Arctic Oscillations are examined by using GISST sea ice extent and SST datasets along with NCEP/NCAR 40 year reanalysis.It is found that the spatial distribution and temporal variation of spring Greenland sea ice extent can be represented by its leading EOF mode.The variation of spring sea ice extent are evidently out of phase to the variations of NAO and AO in precedent winter as well as JFMA mean SSTA in North Atlantic warm current region.Aquasi-60 year period is detected in the variations of the four.As a cold source of the atmosphere,sea ice anomalous variation has significant impacts on the latent and sensible heat fluxe form theocean to the atmosphere as well as the surface net radiation.The larger sea ice extent decreases the surface heat transports to the atmosphere.Consequently,the anomalies of spring sea ice can impact the atmosphere in following seasons.When sea ice extent is larger(smaller),the Icelandics low and Aleutian low weaken(strengthen),and summer heat lows over North African and Asian continents intensify(weaken) accompanied by evident lower(higher) SLPs.