Commentary: Cherry blossoms are proof of a planet going awry
Summarized and contextualized by DistantNews.
TLDR
- Cherry blossoms in Washington D.C. and Kyoto have been blooming significantly earlier in recent decades, with 2023 seeing the earliest bloom in Kyoto in 1,214 years.
- Climate change, driven by human carbon emissions, is identified as the primary cause, raising average March temperatures and accelerating blooming.
- While urban heat contributes, climate change intensifies this effect and makes extreme early blooms more likely, with further warming expected to normalize such extremes.
The delicate beauty of cherry blossoms, a symbol of spring's renewal, is increasingly signaling a planet in distress. In Washington D.C., the Yoshino cherry trees have reached their peak bloom earlier for seven consecutive years, with the average date shifting significantly earlier since the 1940s. This trend is not unique to the US capital; Japan's ancient capital, Kyoto, offers an even starker illustration.
More warming in the decades ahead will mean even earlier blossom dates for cherry blossoms around the world, says Mark Gongloff for Bloomberg Opinion.
Thanks to meticulous records kept since 812 AD by climate scientist Yasuyuki Aono, we have a 1,200-year perspective on Kyoto's cherry blossoms. While natural climate variations have caused fluctuations over the centuries, the changes observed since the 20th century are unprecedented. The average peak bloom date has dramatically shifted, culminating in 2023 when the blossoms appeared earliest in all 1,214 years of Aono's data. This dramatic shift is a powerful, visible indicator of our changing climate.
The Washington cherry blossoms peaked on Mar 26 this year, not long after the start of the National Cherry Blossom Festival. It was the seventh consecutive year in which the trees flowered earlier than their 20-year average.
Science clearly points to climate change, fueled by humanity's carbon dioxide emissions, as the main driver. Global temperatures have risen approximately 1.4 degrees Celsius above pre-industrial levels, leading to warmer March temperatures in cities like Washington and Kyoto, prompting trees to bloom prematurely. While the urban 'heat-island' effect plays a role, climate change exacerbates this phenomenon, making extremely early blooms far more probable.
A SIMILAR TREND IN JAPAN
This phenomenon serves as a potent counterpoint to climate change denial. The evidence is not just in scientific models but in the natural world's observable reactions. As global temperatures continue to climb, we can expect these early blossoms, once an anomaly, to become the new normal. The cherry blossoms, in their fleeting beauty, are thus a poignant reminder of the profound and accelerating impact of our actions on the planet.
His time series shows several big, climate-driven swings in peak-bloom dates over the centuries. But none of those are anything like what has happened since the 20th century began.
DistantNews Editorial
Originally published by CNA. Summarized and contextualized by our editorial team with added local perspective. Read our editorial standards.
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