Extended Abstract (612K)7.1
North Atlantic Atmosphere-Ocean Interaction on Intraseasonal Time Scales
Laura M. Ciasto, Colorado State University, Fort Collins, CO; and D. W. J. Thompson
Intraseasonal wintertime ocean-atmosphere interaction over the North Atlantic sector is examined using lagged correlation/regression analysis. Consistent with previous results,the strongest correlations between midlatitude SSTs and the extratropical atmospheric circulation occur when the atmosphere leads by ~2 weeks. However, the present results also demonstrate a coherent and statistically signicant pattern of SST anomalies over the Gulf Stream extension region that precedes changes in the leading mode of Northern Hemisphere atmospheric variability by ~2 weeks. Possible mechanisms that explain the physical relationship between variability in the Gulf Stream extension and the extratropical atmospheric circulation are discussed.
Session 7, Midlatitude atmosphere–ocean interaction: Part II The North Atlantic
Thursday, 12 August 2004, 2:30 PM-5:15 PM, New Hampshire Room
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