Global temperatures will rise at least 4 degrees Celsius by 2100 and the possibility of more than 8 degrees if carbon emissions are not reduced, according to the results of recent research published in the NATURE journal.
Scientists found that global temperatures are more susceptible to carbon dioxide (CO2) than previously estimated. Collection of carbon dioxide that trap heat in the atmosphere increased by 40 percent in the last century. And, according to recent research, due to release of CO2 emissions from fuel burning power plants, cars, and buildings, the Earth will continue to heat up at a dangerous level.
Steven Sherwood, a climate scientist at the Center of Excellence for Climate System Science, Australia, and lead author of the report, said the forecast temperature rise of 4 degrees Celsius is based on the role of water vapor in cloud formation.
"What we've seen in the study is that if the water vapor rises into the air from the surface of the sea, often only gained a few yards before it begins to fall back to the earth's surface. The steam can also go up to 10 or 15 kilometers. And a shorter path that is obviously important to the climate sensitivity," he said.
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| Carbon emissions from coal-fired power plant in Kansas, USA. (Picture from: http://www.voanews.com/) |
Sherwood said that under this scenario , if the cloud is not formed , the Earth absorbs more sunlight. "The question that arises for many years is, what will happen to the low clouds in the air? Is the cloud will be reduced in time to heat up the Earth, or whether the number will be the same or increase? Our findings are reduced because of the cloud of this process, because water vapor is sucked and fewer clouds in the atmosphere is hot," he said.
Sherwood said climate models show a small rise in global temperature to carbon dioxide does not account for the water vapor process. However, the assumption of this model is all water vapor rises to 15 kilometers into the air and formed clouds.
When processes in climate models is corrected in accordance with the actual reality, simulation cycle that produces water vapor transport to various heights. Sherwood said, this study is a further reminder that reduce emissions in response to the impact of climate change. *** [EKA | FROM VARIOUS SOURCES | ANERICAN LIVE WIRE | VOA NEWS]
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