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DOI	10.1002/2015JG002974
	Revisiting the role of CH4 emissions from alpine wetlands on the Tibetan Plateau: Evidence from two in situ measurements at 4758 and 4320m above sea level
	Wei, Da; Xu-Ri; Tarchen, Tenzin; Dai, Dongxue; Wang, Yuesi; Wang, Yinghong
通讯作者	Xu-Ri (通讯作者)
发表日期	2015
ISSN	2169-8953
EISSN	2169-8961
起始页码	1741
结束页码	1750
卷号	120 期号:9
英文摘要	The alpine wetlands on the Tibetan Plateau (TP) constitute 30% of China's wetlands, and previous studies have considered these wetlands to be important sources of CH4, based on several swamp measurements from the eastern edges of the plateau. However, the alpine wetlands consist of both swamps (9.5%) and swamp meadows (79.8%). In this study, the CH4 fluxes of a swamp meadow and a swamp were determined. The results showed that the swamp meadow emitted much less CH4 (130.8123.9 mu gm(-2)h(-1)) than the swamp (2795.2796.4 mu gm(-2)h(-1)). The CH4 fluxes within the swamp meadow showed distinct microscale spatial heterogeneity: the hollow terrain released CH4, while the hummocks absorbed CH4; this pattern was explained well by soil moisture. The CH4 emissions in the swamp meadow were highly sensitive to soil temperature variation (Q(10)=3.62), while they were more sensitive to soil moisture in the swamp. By summarizing existing measurements, and considering the differences in CH4 emissions from swamp meadows and swamps, the emissions of CH4 from alpine wetlands across the TP were recalculated to range from 0.215 to 0.412TgCH(4)a(-1), lower than previous studies. By comparison, the CH4 uptake by nonwetland ecosystems ranges from -0.68 to -0.53TgCH(4)a(-1). Therefore, this study conveys a notion that the alpine wetlands on the TP may not be significant CH4 sources. However, further studies are needed to reduce the uncertainty regarding CH4 emissions.
关键词	METHANE EMISSIONS NATURAL WETLANDS PEATLANDS FLUXES CO2
英文关键词	methane; swamp meadow; swamp; alpine wetland; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000363332900003
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258542
推荐引用方式 GB/T 7714	Wei, Da,Xu-Ri,Tarchen, Tenzin,et al. Revisiting the role of CH4 emissions from alpine wetlands on the Tibetan Plateau: Evidence from two in situ measurements at 4758 and 4320m above sea level[J]. 中国科学院青藏高原研究所,2015,120(9).
APA	Wei, Da,Xu-Ri,Tarchen, Tenzin,Dai, Dongxue,Wang, Yuesi,&Wang, Yinghong.(2015).Revisiting the role of CH4 emissions from alpine wetlands on the Tibetan Plateau: Evidence from two in situ measurements at 4758 and 4320m above sea level.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,120(9).
MLA	Wei, Da,et al."Revisiting the role of CH4 emissions from alpine wetlands on the Tibetan Plateau: Evidence from two in situ measurements at 4758 and 4320m above sea level".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 120.9(2015).