气候变化领域集成服务门户(CCPortal): Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau

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DOI	10.1016/j.geoderma.2020.114397
	Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau
	Chen, Shengyun; Li, Xiangfei; Wu, Tonghua; Xue, Kai; Luo, Dongliang; Wang, Xiaoming; Wu, Qingbai; Kang, Shichang; Zhou, Huakun; Wei, Dengxian
发表日期	2020
ISSN	0016-7061
EISSN	1872-6259
卷号	372
英文摘要	Soil thermal regime in permafrost regions is sensitive to climate change and may cause vast ecological consequences under future warming scenarios. However, there still lacks a systematic evaluation on the effect of warming on soil thermodynamics in the different ecosystems of permafrost regions. This study investigated the alterations of soil thermodynamics in alpine swamp meadow and alpine steppe under experimental warming by open-top chambers in permafrost regions of the central Tibetan Plateau. The results showed that air temperature increased significantly with an annual mean increase of 1.4 degrees C under warming. Compared to alpine swamp meadow, soil thermodynamics represented by soil temperature, soil thermal parameters, soil freeze-thaw process and active layer thickness in alpine steppe was more susceptible to warming. Specifically, soil temperature at 5-40 cm depths increased more in alpine steppe than alpine swamp meadow under warming, especially at topsoil (5-20 cm). Moreover, the increase in soil temperature at topsoil was greater during cold season than warm season. Greater alterations of soil thermal parameters were likely because soil moisture content reduced more in alpine steppe. Regarding soil freeze-thaw process, warming significantly postponed the onset of completely frozen stage and reduced the completely frozen days in alpine steppe. Active layer thickness in alpine steppe distinctly increased by 46 cm on average and showed an increasing trend under warming from 2009 to 2011. Overall, vegetation coverage and soil moisture content were responsible for the different responses of soil thermodynamics to experimental warming. The study has important implications for future scenarios as permafrost and grassland degradation may intensify under climate warming.
英文关键词	Soil thermodynamics; Experimental warming; Alpine grassland; Tibetan Plateau
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS关键词	ACTIVE-LAYER THICKNESS ; FREEZE-THAW CYCLES ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEM ; MULTILAYERED SOIL ; VEGETATION COVER ; SURFACE ; CONDUCTIVITY ; DEGRADATION ; TEMPERATURE
WOS记录号	WOS:000535713600010
来源期刊	GEODERMA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240302
作者单位	[Chen, Shengyun; Li, Xiangfei; Wu, Tonghua; Wang, Xiaoming; Kang, Shichang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Gansu, Peoples R China; [Chen, Shengyun] Acad Plateau Sci & Sustainabil, Qinghai Res Ctr Qilian Mt Natl Pk, Xining 810008, Qinghai, Peoples R China; [Chen, Shengyun] Qinghai Normal Univ, Xining 810008, Qinghai, Peoples R China; [Li, Xiangfei; Xue, Kai] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Xue, Kai] Chinese Acad Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China; [Xue, Kai] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Luo, Dongliang; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Lanzhou 730000, Gansu, Peoples R China; [Zhou, Huakun] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Restorat E...
推荐引用方式 GB/T 7714	Chen, Shengyun,Li, Xiangfei,Wu, Tonghua,et al. Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2020,372.
APA	Chen, Shengyun.,Li, Xiangfei.,Wu, Tonghua.,Xue, Kai.,Luo, Dongliang.,...&Wei, Dengxian.(2020).Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau.GEODERMA,372.
MLA	Chen, Shengyun,et al."Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau".GEODERMA 372(2020).