Sundberg told the AP that instead of slow change, trees are affected by abnormal weather.

桑德伯格告诉美联社，树木不是缓慢变化，而是受到异常天气的影响。

" They change all of a sudden, or they drop leaves early, " Sundberg said.

" 它们突然变了，很早就落叶了。"

Across the country in Denver, Colorado, high temperatures have left " dead, dry edges of leaves" early in the season, said Michael Sundberg.

迈克尔·桑德伯格说，在科罗拉多州丹佛市，高温在秋季初留下了" 枯死的叶子边缘" 。