Oceans heating faster: study


What is Important?
UPSC perspective:
Prelims & Mains :Highlights

Why in News?
The world’s oceans have absorbed 60% more heat than previously thought over the last quarter of a century, scientists said on Thursday, leaving Earth more sensitive still to the effects of climate change.
Highlights:
*According to their most recent assessment this month, scientists from the Intergovernmental Panel on Climate Change (IPCC) said that the world’s oceans have absorbed 90% of the temperature rise caused by man-made carbon emissions.
* New research published in the journal Nature used a novel method of measuring ocean temperature.
*It found that for each of the last 25 years, oceans had absorbed heat energy equivalent to 150 times the amount of electricity mankind produces annually.That is 60% higher than what previous studies showed.
Way Forward
*While those studies relied on tallying the excess heat produced by known man-made greenhouse gas emissions, a team of U.S.-based scientists focussed on two gases found naturally in the atmosphere — Oxygen and carbon dioxide.
*Both gases are soluble in water, but the rate at which water absorbs them decreases as it warms.
*By measuring atmospheric oxygen and CO2 for each year, scientists were able to more accurately estimate how much heat oceans had absorbed on a global scale.
Oceans heating faster: study Oceans heating faster: study Reviewed by The Hindu Current Affairs on November 03, 2018 Rating: 5

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