Methane emissions from wetlands on the Qinghai-Tibet Plateau

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	Methane emissions from wetlands on the Qinghai-Tibet Plateau
	Jin, HJ; Wu, J; Cheng, GD; Tomoko, N; Sun, GY; Jin, HJ, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
刊名	CHINESE SCIENCE BULLETIN
	1999
卷号	44 期号:24 页码:2282-2286
关键词	Qtp Wetland Ecosystems Ch4 Emission Spatiality And Seasonality Fluxes
ISSN号	1001-6538
英文摘要	The areal extent of cold freshwater wetlands on the Qinghai-Tibet Plateau (QTP) is estimated at 0.133 x 10(6) km(2), suggesting a significant methane potential. Methane fluxes from wet alpine meadows, peatlands, Hippuris vulgaris mires and secondary marshes were 43.18, 12.96, -0.28 and 45.90 mg.m(-2).d(-1), respectively based on the transect flux studies at the Huashixia Permafrost Station (HPS) from July to August 1996. Average CH4 fluxes in the thaw season were extrapolated at 5.68 g.m(-2) according to the areal percentage of wetland areas in the Huashixia region. The CH4 fluxes at four fixed sites, representative of similar ecosystems, ranged from - 19.384-347.15 mg.m(-2). d(-1), and the average CH4 fluxes varied from 6.54 to 71.97 mg.m(-2).d(-1) at each site during the observation period from April to September 1997. The CH4 emissions at each site during the entire thaw season was estimated from 1.21 to 10.65 g.m(-2), displaying strong spatial variations. Seasonal variations of CH4 fluxes also were observed at four sites: CH4 outbursts occurred upon the spring thaw in May and June, CH4 fluxes increased afterwards with rising soil temperatures. Episodic fluxes were observed in summer, which influenced the average CH4 fluxes considerably. Annual CH4 emissions from cold wetlands on the QTP were estimated at about 0.7-0.9 Tg based on the distribution of wetlands, representative CH4 fluxes, and number of thaw days. The centers of CH4 releasing were located in the sources of the Yangtze and Yellow rivers, and Zoige Peatlands.
学科主题	Multidisciplinary Sciences
语种	英语
WOS记录号	WOS:000085006200018
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55593]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Jin, HJ, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Jin, HJ,Wu, J,Cheng, GD,et al. Methane emissions from wetlands on the Qinghai-Tibet Plateau[J]. CHINESE SCIENCE BULLETIN,1999,44(24):2282-2286.
APA	Jin, HJ,Wu, J,Cheng, GD,Tomoko, N,Sun, GY,&Jin, HJ, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.(1999).Methane emissions from wetlands on the Qinghai-Tibet Plateau.CHINESE SCIENCE BULLETIN,44(24),2282-2286.
MLA	Jin, HJ,et al."Methane emissions from wetlands on the Qinghai-Tibet Plateau".CHINESE SCIENCE BULLETIN 44.24(1999):2282-2286.