{{The world is getting warmer, as greenhouse gases reach historic highs and Arctic sea ice melts, making 2013 one of the hottest years on record, international scientists said Thursday.}}<\/p>\n
The annual State of the Climate report 2013 is a review of scientific data and weather events over the past year, compiled by 425 scientists from 57 countries.<\/p>\n
“These findings reinforce what scientists for decades have observed: that our planet is becoming a warmer place,” said National Oceanic and Atmospheric Administration administrator Kathryn Sullivan.<\/p>\n
Global temperatures were among the warmest on record worldwide, with four major datasets showing 2013 ranked between second and sixth for all-time heat.<\/p>\n
“Australia observed its warmest year on record, while Argentina had its second warmest and New Zealand its third warmest,” said the report.<\/p>\n
Sea surface temperatures also rose, making last year among the 10 warmest on record.<\/p>\n
The Arctic marked its seventh warmest year since records began in the early 1900s.<\/p>\n
Arctic sea ice cover was the sixth lowest since satellite observations began in 1979.<\/p>\n
On average, global sea levels also rose, keeping pace with a trend of adding about three millimeters per year over the past two decades, it said.<\/p>\n
Methane, carbon dioxide and other greenhouse gases that come from burning fossils fuels “continued to rise during 2013, once again reaching historic high values,” said the report.<\/p>\n
For the first time, the daily concentration of C02 in the atmosphere exceeded 400 parts per million (ppm), as measured by the Mauna Loa Observatory in Hawaii, a year after observational sites in the Arctic observed C02 at 400 ppm in spring 2012.<\/p>\n
The report, published in the peer-reviewed Bulletin of the American Meterological Society, offers a “detailed scientific snapshot of what’s happening in our world,” said the group’s executive director Keith Seifer.<\/p>\n
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