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Anne-Marie Brunner and Jim Bisagni University of Massachusetts, Dartmouth

Anne-Marie Brunner and Jim Bisagni University of Massachusetts, Dartmouth School for Marine Science & Technology, Department of Estuarine & Ocean Sciences. Interannual Variability of Satellite-Derived Sea Surface Temperature in the Western North Atlantic Shelf and Slope, 1985-1999.

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Anne-Marie Brunner and Jim Bisagni University of Massachusetts, Dartmouth

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  1. Anne-Marie Brunner and Jim Bisagni University of Massachusetts, Dartmouth School for Marine Science & Technology, Department of Estuarine & Ocean Sciences Interannual Variability of Satellite-Derived Sea Surface Temperature in the Western North Atlantic Shelfand Slope, 1985-1999

  2. Propagation of the 1997/1998 “Cold Event” in satellite derived SST 1 2 3 4 Adapted from Drinkwater et al. (1999). 5 6

  3. SST 1 SST 2 SST 3 SST 4 NAO 0.017 0.119 (p<0.1) 0.031 0.324 (p<0.0001) Qnet 1 -0.099 0.004 0.017 -0.008 Qnet 2 -0.061 0.03 -0.048 -0.075 Qnet 3 -0.076 0.163 (p<0.05) 0.147 (p<0.05) -0.195 (p<0.025) Qnet 4 0.324 (p<0.0001) -0.057 -0.243 (p<0.0001) -0.207 (p<0.01) W 1 0.296 (p<0.0001) 0.081 -0.146 (p<0.05) 0.119 (p<0.1) W 2 -0.017 -0.172 (p<0.025) 0.025 -0.056 W3 -0.115 (p<0.1) -0.151 (p<0.05) 0.044 0.077 W4 0.000 -0.066 -0.105 -0.107 Correlation Coeff. R

  4. Comparison of Offshelf EOF results with GSNW

  5. Summary • We can track intrusions of LSW into the Slope Sea using satellite-derived SST. • Low correlation and significance levels suggest that other mechanisms besides climate-related variability of surface forcing from wind magnitude and net heatflux related to the NAO are important in the shelf-slope region of the western North Atlantic ocean. • Evidence points to other mechanisms that may include horizontal advection and vertical mixing and may play a large role in controlling IAV of SST. • Influence of position of the Gulfstream onto offshore seasurface temperature varies along the western North Atlantic shelf and slope; maybe indicating co-variation between the polar and subpolar gyres.

  6. Correlation Table Mode R P< R^2 [%] 0.001 1 -0.39 14.98 Qnet -0.03 0.08 2 3 0.29 -0.05 1 5.39 0.010 -0.23 0.001 NAO Wind 2 -0.47 21.62 3 -0.06 0.34 1 0.08 0.03 -0.12 SST 2 1.42 0.100 3 0.04 0.13 0.200 1 1.09 -0.10 2 0.06 Mode 1 SST -0.02 3 0.02 0.03 1 0.01 0.01 Mode 2 SST Qnet 2 -0.07 0.48 0.200 3 0.91 -0.10 1 0.00 0.00 2 -0.22 4.68 0.010 Mode 3 SST 0.07 3 0.55 0.07 0.48 1 0.07 Mode 1 SST 2 0.51 3 0.33 -0.06 0.100 1 1.40 -0.12 Mode 2 SST 0.00 Wind 2 0.00 3 0.03 0.07 -0.06 1 0.38 0.43 Mode 3 SST 2 -0.07 0.5 3 2.25 0.15

  7. Comparison of Offshelf EOF Results with GSNW

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