Spring 2007 Update: Long Term Temperature-Area 4 (Georges Bank)
Index area 4 of the long term ERSST dataset overlaps some of Georges Bank, but in looking at the temperatures trends it is obvious that much of area 4 captures SSTs from the Gulf Stream and warmer waters to the south. Since the SST trend between area 4 and Georges Bank correlate well, it was deemed useful to look at this area. The annual mean SST for area 4 during 2006 was 15.0°C which is greater than the long term mean of 14.1°C, but still less than the maximum of the time series of 15.8°C. SSTs were higher during the mid-century warming period of the 1940s, and nearly as high as the beginning of the time series. Winter-summer temperature difference has been increasing at a much slower rate in waters off the shelf and this is reflected in the data for area 4. The winter-summer difference was 12.5°C in 2006, which is only slightly greater than the long term mean of 12.3°C, but still less than the maximum difference of the time series of 14.9°C. Finally, the fall SST index for this area is patterned similarly to the annual mean with a value of 15.4°C in 2006, which is greater than the long term mean of 14.6°C, but still less than the maximum of the time of 16.7°C.