By Seth Borenstein ,AP
WASHINGTON — Global warming has not stopped or even slowed in the past 18 years, according to a new U.S. government federal study that rebuts doubters who’ve claimed that that heating trends have paused.
Scientists at the National Oceanic and Atmospheric Administration readjusted thousands of weather data points to account for different measuring techniques through the decades. Their calculations show that since 1998, the rate of warming is about the same as it has been since 1950: about two-tenths of a degree Fahrenheit a decade.
The so-called hiatus has been touted by non-scientists who reject mainstream climate science. Those claims have resonated; two years ago, the United Nation’s Intergovernmental Panel on Climate Change felt the need to explain why the Earth was not heating up as expected, listing such reasons as volcanic eruptions, reduced solar radiation and the oceans absorbing more heat.
One key to claims of a hiatus is the start date: 1998. That year there was a big temperature spike; some of the following years were not as hot, though even hotter years followed in 2005, 2010 and 2014, according to NOAA, NASA and temperature records kept in England and Japan. This year is on pace to break last year’s global heat record.