气候变化领域集成服务门户(CCPortal): Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover

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DOI	10.1088/1748-9326/ab0839
	Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover
	Wang Z.; Kim Y.; Seo H.; Um M.-J.; Mao J.
发表日期	2019
ISSN	17489318
卷号	14 期号:4
英文摘要	The permafrost response to variations in Arctic vegetation remains controversial. We investigated the consequences of Arctic vegetation greenness variation over the past three decades using a coupled land-atmosphere model and found that it induces air temperature perturbation, which is further amplified by snow cover variation and eventually leaves a footprint on soil temperature. Compared to the atmospheric impacts of vegetation, local shading of vegetation canopy has relatively minor effects on soil temperature. Significant soil warming was observed along the summer snowline between the Low and High Arctic, indicating the direct impact of snow cover variation led by vegetation changes. In the Low Arctic, the winter snowpack insulates the soil from colder air, resulting in less permafrost. In the High Arctic, snow persists for more than 330 d per year and has a strong protection effect on the permafrost as it insulates soil from warmer summer air and reflects solar radiation. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	arctic vegetation; permafrost; snow cover
语种	英语
scopus关键词	Permafrost; Radiation protection; Snow; Vegetation; Atmosphere modeling; Atmospheric impact; Protection effect; Snow cover variations; Snow covers; Surface air temperatures; Vegetation canopy; Vegetation greenness; Atmospheric temperature; air temperature; air-soil interaction; permafrost; snow cover; snowpack; soil temperature; solar radiation; tundra; vegetation dynamics; vegetation type
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154612
作者单位	Department of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, South Korea; Department of Civil Engineering, Kyonggi University, Gyeonggi, Suwon, 16227, South Korea; Environmental Sciences Division, Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States
推荐引用方式 GB/T 7714	Wang Z.,Kim Y.,Seo H.,et al. Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover[J],2019,14(4).
APA	Wang Z.,Kim Y.,Seo H.,Um M.-J.,&Mao J..(2019).Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover.Environmental Research Letters,14(4).
MLA	Wang Z.,et al."Permafrost response to vegetation greenness variation in the Arctic tundra through positive feedback in surface air temperature and snow cover".Environmental Research Letters 14.4(2019).