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Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau
Zhang, Han1,2; Yao, Zhisheng2; Ma, Lei2,3; Zheng, Xunhua2,3; Wang, Rui2; Wang, Kai2; Liu, Chunyan2; Zhang, Wei2; Zhu, Bo4; Tang, Xiangyu4; Hu, Zhenghua1; Han, Shenghui2
Corresponding AuthorZheng, Xunhua(xunhua.zheng@post.iap.ac.cn)
2019-03-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume657Pages:1323-1333
AbstractGrazing-oriented drainage of alpine/boreal wetlands has been broadly implemented to meet the increasing demand for animal products. However, the annual methane (CH4) emissions from alpine fens degraded due to drainage for grazing have not been well characterized clue to a lack of year-round observations. In this study, the year-round CH4 fluxes from a degraded alpine fen that is typical in the Tibetan Plateau (TP) were measured. The temperature sensitivity of the CH4 emissions during the nongrowing season (NGS) was different between the microsites with and without CH4 uptake during the growing season (GS), showing apparent activation energy of 59-61 vs. 22-43 kJ mol(-1) (or variation folds induced by the 10-degree change (i.e., Q(10)): 2.61-2.74 vs. 1.38-1.91). The CH4 emissions amounted to 0.2-63.3 kg C ha(-1) yr(-1) (with 0.8 to 41.4 kg C ha(-1) and 0.9 to 21.9 kg C ha(-1) in the GS and NGS, respectively), which were significantly (P < 0.05) related to the distances to the drainage ditch or water tables across the six microsites. As a key factor, the water table determined the role of the CH4 emissions during freezing/thawing. For cool/cold/alpine wetlands with no CH4 uptake in the GS, a mean factor of 1.52 (within a range of 1.00-2.44 at the 95% confidence interval), corresponding to an NGS contribution of 34% (ranging from 0 to 59%), was recommended to upscale the GS emissions to annual totals. Degradation of the native peat marshes in the Zoige region (originally the largest area of alpine wetlands) due to intentional drainage has greatly reduced the quantities of CH4 emissions. Additional studies are still needed to minimize the large uncertainties in CH4 emissions estimates for the changes in alpine wetlands in this region and for the entire TP. (C) 2018 Elsevier B.V. All rights reserved.
KeywordMethane Nongrowing season Wetland drainage Alpine peat lands Tibetan Plateau Annual flux multiplier
DOI10.1016/j.scitotenv.2018.11.443
Indexed BySCI
WOS KeywordATMOSPHERE EXCHANGE ; NORTHERN PEATLAND ; CARBON-DIOXIDE ; NITROUS-OXIDE ; CH4 EMISSIONS ; GAS EMISSIONS ; FLUXES ; BOREAL ; ZOIGE ; N2O
Language英语
Funding ProjectMinistry of Science and Technology of China[2016YFA0602303] ; Ministry of Science and Technology of China[2012CB417100] ; National Natural Science Foundation of China[41603075] ; National Natural Science Foundation of China[41375152] ; National Natural Science Foundation of China[41321064]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000455903400129
Funding OrganizationMinistry of Science and Technology of China ; National Natural Science Foundation of China
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24979
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorZheng, Xunhua
Affiliation1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Coll Appl Meteorol, Nanjing 210044, Jiangsu, Peoples R China
2.Chinese Acad Sci, State Key Lab Atmospher Boundary Layer Phys & Atm, Inst Atmospher Phys, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Han,Yao, Zhisheng,Ma, Lei,et al. Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,657:1323-1333.
APA Zhang, Han.,Yao, Zhisheng.,Ma, Lei.,Zheng, Xunhua.,Wang, Rui.,...&Han, Shenghui.(2019).Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,657,1323-1333.
MLA Zhang, Han,et al."Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 657(2019):1323-1333.
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