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DOI	10.1007/s12665-014-3394-3
	Warming effects on carbon release in a permafrost area of Qinghai-Tibet Plateau
	Peng, Fei; Xue, Xian; You, Quangang; Zhou, Xuhui; Wang, Tao
发表日期	2015
ISSN	1866-6280
EISSN	1866-6299
卷号	73 期号:1
英文摘要	The warming of permafrost soils and the resulting change in soil respiration (Rs) is one of the most uncertainties in research on global change. To better understand the effect of warming on permafrost soils and the feedback of Rs to climatic warming, a manipulative warming experiment was conducted with two warming levels (low-and high-level warming; increases of 1.88 degrees C (W1) and 3.19 degrees C (W2) in soil surface temperature, respectively) from year 2010 to 2011 using infrared heaters in inland area of the Qinghai-Tibet Plateau (QTP). Warming significantly decreased the soil moisture at depths of 0-10 and 10-20 cm, but increased it at depths of 40-60 and 60-100 cm, most likely because of the permafrost melting. Both warming treatments delayed the onset of freezing and advanced the onset of thawing in the active layer of permafrost with a stronger effect observed in W2. Annual soil C release increased by 77.1 and 125.8 g C year(-1) in the W1 and W2 treatments, respectively, which equated to an increase of 18 and 29 % compared with the control (C). The increase in Rs was higher in the thawing period than in the freezing period. The decrease in soil water content in the upper soil layer did not significantly inhibit Rs because warming extended the thawing period and increased the soil labile C. Our results indicate that permafrost soils will release more C to the atmosphere, even though surface soil moisture decreases in a warming climate in the dry alpine meadow in the QTP.
关键词	Warming Permafrost Qinghai-Tibet Plateau Soil respiration Labile carbon Feedback
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
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/111789
作者单位	Chinese Acad Sci, Key Lab Desert & Desertificat, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Peng, Fei,Xue, Xian,You, Quangang,et al. Warming effects on carbon release in a permafrost area of Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2015,73(1).
APA	Peng, Fei,Xue, Xian,You, Quangang,Zhou, Xuhui,&Wang, Tao.(2015).Warming effects on carbon release in a permafrost area of Qinghai-Tibet Plateau.ENVIRONMENTAL EARTH SCIENCES,73(1).
MLA	Peng, Fei,et al."Warming effects on carbon release in a permafrost area of Qinghai-Tibet Plateau".ENVIRONMENTAL EARTH SCIENCES 73.1(2015).