Washington-SANA
A recent American study on "How climate change affects the pattern and duration of the earth's seasons" warned that the summer season will continue in the northern hemisphere for nearly 6 months at the end of this century if global warming continues without monitoring.
The study, published by the American Geophysical Research Letters Journal today, revealed that if the rate of global warming continues on its current path, the semi-annual summer may become the new normal for countries north of the equator by the year 2100.
The researchers pointed out in their study that climate change will have potentially catastrophic effects on agriculture, human health and the environment. During the 1950s in the Northern Hemisphere, the four seasons reached a predictable and somewhat equal pattern, but climate change is now leading to dramatic and irregular changes.
The researchers said that these changes affected the length of the seasons and their start dates, which may become more extreme in the future, and if these trends continue without any effort to mitigate climate change, then by the end of the century winter will last less than two months, and this warmer and shorter winter could lead to instability. And the cold eruption and winter storms are similar to the recent snowstorms in Texas.
The researchers used historical daily climate data from 1952 to 2011 to measure changes in the length of the four seasons and their onset in the northern hemisphere and determined the beginning of summer as the onset of temperatures at more than 25 percent hotter during that time period, while winter began with temperatures colder than 25 percent. So the team used well-established models of climate change to predict how the seasons will change in the future.
The new study concluded that the summer on average grew from 78 to 95 days between 1952 and 2011, while winter shrank from 76 to 73 days. Spring and autumn also shrank from 124 to 115 days and from 87 to 82 days, respectively.