Temperature readings are growing around the world. But in the central and eastern parts of the U.S. indicators of global warming has long surpassed other countries.
In the period from 1930 to 1990 temperature readings in some parts of the U.S. have dropped, but the central and eastern parts continued to grow much faster than anywhere else. Climatologists called cooling area "warming hole", as the area around it heats up very quickly. Map provided by NASA, the cooling zone can be seen in a light blue and the heating zone — in the red.
The reason for the "warming hole" over the United States has puzzled researchers for many decades. Some scholars have suggested that this is due to natural changes in ocean surface temperature. But in the new study, put forward as a reason sulphates emitted plant running on coal. These sulfates are also a cause of acid rain. They cause cooling due to its ability to reflect light and give the cloud stability.
The study was performed by scientists at the Massachusetts Institute of Technology under the direction of Eric Lyaybenspergera. The study used a variety of climate models to evaluate the effect of sulfate on the climate from the U.S. in 1950. It was found that in the period from 1970 to 1990, when emissions were highest sulfate, and the temperature dropped by 1 degree Celsius. However, between 1980 and 2010 for release to the atmosphere decreased by 58%, which was confirmed by data obtained using Ozone Monitoring Instrument, installed on the satellite Aqua.