West Greenland Warming: 1991-2004

CO2 Science

...they report that the changes they observed over the last decade "are on the same order as changes [that] occurred between 1920 and 1930."
...
Climate alarmists generally contend that the global warming of the past several years was unprecedented over the past one to two millennia, and that the warming of the Arctic was greatly magnified above that. However, Hansen et al.'s analysis suggests that the recent warming in West Greenland -- as dramatic as it was -- was not even unprecedented over the past century.