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Jun 05, 2015

US Study Says Hiatus In Global Warming Incorrect

Environment by Maruti
image The notion that there has been a slowdown or "hiatus" in the rate of global warming in recent years could be wrong and caused due to inaccurate data, showed the results of a study published this week. The rate of global warming during the last 15 years has been as fast as or faster than the pace seen during the late 20th century, revealed the study by the scientists at the National Oceanic and Atmospheric Administration, published in the Science journal. "Adding in the last two years of global surface temperature data and other improvements in the quality of the observed record provide evidence that contradict the notion of a hiatus in recent global warming trends," said Thomas Karl, Director of NOAA's National Centers for Environmental Information said in a statement on the agency's website. In its Fifth Assessment Report, released in stages between 2013-2014, the Intergovernmental Panel on Climate Change had concluded that the upward global surface temperature trend from 1998-2012 was markedly lower than the trend from 1951-2012. The NOAA study used the global surface temperature record that includes the most recent two years of data, 2013 and 2014--the hottest year on record. The calculations also use improved versions of both sea surface temperature and land surface air temperature datasets, the agency said.


Among the most significant improvements was a correction that accounts for the difference in data collected from buoys and ship-based data. Lastly, the incorporation of additional years of data, 2013 and 2014, with 2014 being the warmest year on record, has had a notable impact on the temperature assessment. As stated by the IPCC, the "hiatus" period 1998-2012 is short and began with an unusually warm El Niño year, the NOAA said.

The NOAA report has stirred a debate among climate scientists, many of whom favor the notion that there may be a slowdown in the global warming, but are quick to point out that it does not mean the long-term risks from the phenomenon are less severe.