Sea surface temperature anomaly
This map shows anomalies in the sea surface temperature in September 2011. (An anomaly is when something differs from the norm.) Dark red areas indicate where recorded temperatures are significantly warmer than they were in the same month in previous years. Frighteningly, the most striking region shown here is in the Arctic, where the effects of global warming are particularly apparent.
This data was collected using sea surface temperature data from the advanced microwave scanning radiometer for EOS (called AMSR-E) aboard NASA’s Aqua satellite.