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Volcanic eruptions often bring disasters that even claimed lives. On the other hand, natural phenomena that bring benefits to humans. One of them, preventing the Earth 'roasted' the heat of the Sun.
Here's the explanation: when it erupts, volcanoes throw particles into the atmosphere, blocking the sun's rays. Some scientists believe that it offsets the effects of carbon emissions caused by human activities, at least in the last 15 years – which are the battlefields of global warming.
There has been a vacuum or hiatus in global warming since 1998. An estimated temperature gap with the actual one makes some skeptics, that global warming is just paranoid or lies.
They argue that this global warming model exaggerates the effects of carbon dioxide (CO2) released by burning fossil fuels.
The study, published in the science journal Nature Geoscience, offers an explanation for overcoming the polemic. Calling the volcanic eruptions helped explain the recent slowdown in temperature rises.
Using satellite data, the researchers found a link between Earth's surface temperature and the effects of a post-2000 volcanic eruption.
There are at least 17 volcanoes that erupted since 2000, including Nabro in Eritrea, Kasatochi in Alaska, and Merapi in Indonesia. The eruptions of the mountains that are not how large they are, are ignored to date by climate scientists.
However, little by little the sulfur spewed by volcanoes reflects sunlight and slightly cools the atmosphere at lower levels.
The impact of the "aerosol" accounted for 15 percent of the estimated and actual temperature gap between 1998 and 2012.
"The vacuum of global warming since 1998 has a number of different causes," said study author Ben Santer of Lawrence Livermore National Laboratory, California, as published by Channel News Asia on Monday (24/2/2014).
"The cooling caused by volcanic eruptions early in the 21st Century is one of the causes."Earlier the devastating eruption of Mount Pinatubo in the Philippines in 1991, is widely known to have a cooling effect on the Earth's surface. Meanwhile, the eruption of Mount St. Helens in 1980 lowered the global temperature to 0.1 degrees Celsius.
History notes, the eruption of Mount Tambora in 1815 made winter absent in 1816 – year without summer. Then in 1883, months after the eruption of Mount Krakatau, the world experienced winter, sunset with shimmer, and dusk prolonged due to the spread of aerosols throughout the stratosphere.
Ben Santer said, human lucky effect of volcanic eruptions neutralize global warming caused by Earth's inhabitants.
However, its only temporary. "We do not know how volcanic activity will evolve over the next few decades, not knowing how long this 'luck' will continue."
Commenting on the study, Piers Forster, a professor of climate change at the University of Leeds, said the volcano contributed to the slowdown of warming, but could not be considered to be the only cause.
"The volcano gives us a momentary pause from the unrelenting heating pressure as CO2 increases," he added. (Ein / Yus)
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