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Japan just recorded its earliest cherry blossom bloom in 1,200 years.

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  发表于 Apr 5, 2021 14:03:09 来自手机 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Think of Japan in the spring, and the image that comes to mind is likely the country's famous cherry blossoms, also known as "sakura" -- white and pink flowers, bursting across cities and mountains, petals covering the ground.

The flowers, which experience a "peak bloom" that only lasts a few days, have been revered in Japan for more than a thousand years. Crowds celebrate with viewing parties, flocking to the most popular locations to take photos and have picnics underneath the branches.

But this year, cherry blossom season has come and gone in the blink of an eye, in one of the earliest blooms on record -- and scientists warn it's a symptom of the larger climate crisis threatening ecosystems everywhere.

Yasuyuki Aono, a researcher at Osaka Prefecture University, has gathered records from Kyoto back to 812 AD from historical documents and diaries. In the central city of Kyoto, cherry blossoms peaked on March 26, the earliest in more than 1,200 years, Aono said.

And in the capital Tokyo, cherry blossoms reached full bloom on March 22, the second-earliest date on record.

"As global temperatures warm, the last spring frosts are occurring earlier and flowering is occurring sooner," said Dr. Lewis Ziska from Columbia Universities Environmental Health Sciences.

The peak bloom dates shift every year, depending on numerous factors including weather and rainfall, but have shown a general trend of moving earlier and earlier. In Kyoto, the peak date hovered around mid-April for centuries, according to Aono's data, but began moving into early April during the 1800s. The date has only dipped into late March a handful of times in recorded history.

"Sakura blooms are very temperature sensitive," said Aono. "Flowering and full bloom could be earlier or later depending on the temperature alone," he said. "The temperature was low in the 1820s, but it has risen by about 3.5 degrees Celsius (6.3 degrees Fahrenheit) to this day."

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