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In Japan and the United States, climate change has caused cherry trees to bloom early

The peak of this year’s cherry blossoms was earlier, about 10 days earlier than average. The March 26 In Kyoto, global warming is the cause. And not just in Japan, And trees It also thrived for the first time in many cities in the United States. A scene from nature of course but very soon.

According to my researcherOsaka UniversityFlowering has never occurred so early since 812, that is, since the date of the peak of cherry blossoms began to be recorded in the imperial court archives. The previous record dates back to the spring of 1409, when peak flowering occurred on March 27th.

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Cultivated for flower, not fruit, cherry trees grow in a pink and white bloom show for about two weeks a year. They originate in Japan but were introduced to the United States in the early 20th century, and usually peak bloom, which is when 70% of the flowers emerge, between the last week of March and the first week of April.

Since the beginning of the nineteenth century, the history of full cherry blossoms in Kyoto declined earlier than the historical average and earlier, and gradually shifted from mid-April to the beginning of the month. In the past 50 years, this phenomenon has seen further acceleration. A sign of an increase in the average temperature.

The peak date for this year in Japan was, as we have said, March 26, surpassing the previous record on March 27, 1409.

We can say that it is very likely to be due to the greenhouse effect“, He explains Shunji Enpei, an officer in the observation department of the Japan Meteorological Agency.

© Osaka University

This was the ninth flowering in a row earlier than usual. The transition to early flowering in Kyoto has been the fastest over the past 100 to 150 years. In 1850, the average flowering date is around April 17th. But now it’s approaching April 5th. According to thJapan Meteorological AgencyDuring this period, the average temperature in Kyoto increased by 6 degrees (3.4 degrees Celsius).

Sources: Osaka University / Watchman / Japan Meteorological Agency.

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