泰加语
北极的
环境科学
北方的
海冰
北极
海洋学
北极冰盖
自然地理学
气候学
地质学
地理
林业
考古
作者
Roman Dial,Colin Maher,Rebecca E. Hewitt,Amy M. Wockenfuss,R.K. Wong,David Livingston Crawford,Madeline G. Zietlow,Patrick F. Sullivan
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2024-02-23
卷期号:383 (6685): 877-884
标识
DOI:10.1126/science.adh2339
摘要
Climate-induced northward advance of boreal forest is expected to lessen albedo, alter carbon stocks, and replace tundra, but where and when this advance will occur remains largely unknown. Using data from 19 sites across 22 degrees of longitude along the tree line of northern Alaska, we show a stronger temporal correlation of tree ring growth with open water uncovered by retreating Arctic sea ice than with air temperature. Spatially, our results suggest that tree growth, recruitment, and range expansion are causally linked to open water through associated warmer temperatures, deeper snowpacks, and improved nutrient availability. We apply a meta-analysis to 82 circumarctic sites, finding that proportionally more tree lines have advanced where proximal to ongoing sea ice loss. Taken together, these findings underpin how and where changing sea ice conditions facilitate high-latitude forest advance.
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