Scientists University of Washington have revealed that since the 2010, the warmth wave began to occur more often in medium and high latitudes of the northern hemisphere. This is reported in the article published in the journal of Journal of Climate.
Researchers analyzed climatic data covering 1979-2019. It turned out that the frequency of heat waves from the 80s increased seven times. In the 2010, hot weather was observed 143 days out of 153 days in the warmest months, from May to September. The intensity of heat waves also increased by 17 percent, and their geographic length is 46 percent.
It is known that the abnormal heat can cause catastrophic droughts and forest fires, but the simultaneous appearance of heat waves at different points of the globe can significantly increase the threatening situation. Under the example of 2019-2020, it is shown that in such cases, the global crop of farm crops falls for four percent.
Waves of heat Scientists are defined as high temperature areas, existing three days or more and covering at least 1.6 million square kilometers, which is comparable to the area of Mongolia or Iran. The cause of abnormal heat is the overall increase in the average global temperature due to climate change. Over the past century, the world heated for one degree Celsius, and two thirds of this increase occurred since 1975.