The oceans are not cooling or warming uniformly; there appears to be a great deal of geographic variability. When people usually speak of global warming, they think of the entire ocean warming up or cooling down. We don't have the accuracy yet to determine the magnitude of the average global trend, but we at least are trying to point out the signs of these trends.

If temperatures continue to increase in the tropical North Atlantic, many of the coral reefs there (and their ecosystems) may be affected by bleaching. Also, since hurricane development does depend on sea surface temperatures, the conditions necessary for hurricanes to form may be accentuated.