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Is the global warming 'hiatus' over?
http://phys.org/news/2015-08-global-hiatus.html There are many ongoing signs that the planet is heating up, even "on fire." So what's going on? Increased warming is expected because human activities are leading to increases in heat-trapping greenhouse gases, mainly carbon dioxide from burning of fossil fuels. And indeed, the global mean surface temperature (GMST) has been rising fairly steadily: every decade after the 1960s was warmer than the one before, and the decade of the 2000s was the warmest on record by far; In a paper titled "Has There Been a Global Warming Hiatus?", I find that natural variability through interactions among the oceans, atmosphere, land and ice can easily mask the upward trend of global temperatures. For climate scientists to improve climate models, better understanding of these variations and their effect on global temperatures is essential. Read more at: http://phys.org/news/2015-08-global-hiatus.html#jCp The earth is absorbing more energy from the sun than it's giving up due to increasing greenhouse gas concentrations. The excess energy that the planet is absorbing is enormous. The total energy imbalance now is 0.58 ± 0.15 W/m^2. Based on the laws of thermodynamics, the earth has to warm. |
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