Saturday, April 18, 2015

Global warming: January update

Worldwide, cooler by recent standards, but still on the warm side.

Global warming: January update

Globally, last month was among the cooler Januaries of the last 20 years but still ended up as the 17th warmest January in the period of record dating to 1880, according to the National Climate Data Center.

The combined land-sea surface temperature finished 0.68 degrees Fahrenheit above the 20th Century average, the center reports.

That places it at No. 14 among Januaries of the last 20 years, which dominate the top spots in the January warming derby.

Last month also was about 0.4 degrees Fahrenheit cooler than January 2010, and that probably has a lot to do with the state of the tropical Pacific.

In the winter of 2009-10, an El Nino warming dominated millions of square miles of Pacific sea-surface. This year, it has been a La Nina cooling.

Arctic sea ice was at its smallest January extent since record-keeping began in 1979, the center said.

Snow cover in the Northern Hemisphere was above average for the fourth consecutive January.


Inquirer Weather Columnist
About this blog

Everyone talks about the weather, and here we write about it.

When we’re around and conditions warrant, we’ll keep you updated about what’s coming, but we will do our best always to discuss weather and climate developments in context and remind you that nothing in the atmosphere happens in a vacuum.

Tony Wood has been writing about the atmosphere for The Inquirer for 26 years.

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Tony Wood Inquirer Weather Columnist
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