文章基本信息

标题：Intensified Arctic warming under greenhouse warming by vegetation–atmosphere–sea ice interaction
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作者：Jee-Hoon Jeong ; Jong-Seong Kug ; Hans W Linderholm 等
期刊名称：Environmental Research Letters
印刷版ISSN：1748-9326
电子版ISSN：1748-9326
出版年度：2014
卷号：9
期号：9
页码：094007
DOI：10.1088/1748-9326/9/9/094007
语种：English
出版社：IOP Publishing Ltd
摘要：Observations and modeling studies indicate that enhanced vegetation activities over high latitudes under an elevated CO₂ concentration accelerate surface warming by reducing the surface albedo. In this study, we suggest that vegetation-atmosphere-sea ice interactions over high latitudes can induce an additional amplification of Arctic warming. Our hypothesis is tested by a series of coupled vegetation-climate model simulations under 2xCO₂ environments. The increased vegetation activities over high latitudes under a 2xCO₂ condition induce additional surface warming and turbulent heat fluxes to the atmosphere, which are transported to the Arctic through the atmosphere. This causes additional sea-ice melting and upper-ocean warming during the warm season. As a consequence, the Arctic and high-latitude warming is greatly amplified in the following winter and spring, which further promotes vegetation activities the following year. We conclude that the vegetation-atmosphere-sea ice interaction gives rise to additional positive feedback of the Arctic amplification.