Prediction that 'half of the year will be summer' by 2100
Global climate change is progressing day by day, and some experts argue that
Changing Lengths of the Four Seasons by Global Warming --Wang ---- Geophysical Research Letters --Wiley Online Library
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL091753
Northern Hemisphere summers may last nearly half the year by 2100
A research team led by Yuping Guan , who studies tropical oceanography at the Chinese Academy of Sciences, gathered climate information from around the world from 1952 to 2011 and calculated the average temperature in the area between 30 and 60 degrees north latitude. Of the annual temperature in the area, the period from the highest temperature to 25% is defined as summer, the period from the lowest temperature to 25% is winter, and the period between them is defined as spring / autumn. The length was calculated and the result is shown in a circle graph. Japan is included in this area because it is located between latitudes 20 and 46 degrees north.
The result of the survey looks like this. In 1952, 'Spring: 124 days', 'Summer: 78 days', 'Autumn: 87 days', and 'Winter: 76 days', and summer and winter are almost the same length. Although 1952 is a leap year, February 29 is ignored for a brief comparison.
The lengths of the four seasons in 2011 are 'Spring: 115 days', 'Summer: 95 days', 'Autumn: 82 days', and 'Winter: 73 days'. The summer period has become longer, and the spring / autumn / winter period has become shorter.
Based on the results of the survey, the research team predicts the period of the four seasons of 2100 if climate change progresses as it is. As a result, in 2100, 'Spring: 108 days', 'Summer: 166 days', 'Autumn: 60 days', 'Winter: 31 days', about half of the year is occupied by summer, and winter is about one month. Was derived.
'Climate change is thought to cause adverse effects on agriculture and serious health risks,' Guan said, arguing that climate change has a significant impact on humankind.
In 2019, a forecast was announced that 'climate change will reduce agricultural productivity by 25% and fishery productivity by 60% in 2100,' and in February 2021, 'the earth by 2100. The sea level will rise by 1.35 meters, 'and there are concerns about the serious impact of climate change on the global environment.
Research results show that climate change has a serious impact on agriculture and fisheries --GIGAZINE
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