Global Warming "Undeniable," U.S. Government Report Says
Past decade hottest on record, NOAA study says.
The report focused on climate changes measured in 2009 in the context of newly available data on long-term developments.
(See "Heat Wave: 2010 to Be One of Hottest Years on Record.") For instance, surface air temperatures recorded from more than 7,000 weather stations around the world over the past few decades confirm an "unmistakable upward trend," the study says.
And for the first time, scientists put data from climate indicators—such as ocean temperature and sea-ice cover—together in one place. Their consistency "jumps off the page at you," report co-author Derek Arndt said.
"This is like going to the doctor and getting your respiratory test and circulatory test and your neurosystem test," said Arndt, head of the Climate Monitoring Branch of NOAA's
