NOAA: January 2011 Ranked 17th Warmest on Record

February 15, 2011

Last month was the 17th warmest January for combined global land and ocean surface temperature since records began in 1880. La Niña, with its cooling effect on the central and eastern tropical Pacific, continues to be a factor in global ocean temperatures.

The monthly analysis from NOAA’s National Climatic Data Center is part of the suite of climate services NOAA provides government, business and community leaders so they can make informed decisions.

Global Temperature Highlights

Polar Sea Ice and Precipitation Highlights:

Scientists, researchers and leaders in government and industry use NOAA’s monthly reports to help track trends and other changes in the world's climate. This climate service has a wide range of practical uses, from helping farmers know what and when to plant, to guiding resource managers with critical decisions about water, energy and other vital assets.

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* New information in this report: Based on requests from our users, NOAA is now making it easier to find information in its global State of the Climate report about ranges of uncertainty (“range”) associated with its global temperature calculations. NCDC previously displayed this information in certain graphics associated with the report, but it will now publish these ranges in the form of “plus or minus” values associated with each monthly temperature calculation. These values are calculated using techniques published in peer-reviewed scientific literature. More information.