globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2578
论文题名:
Climate-sensitive northern lakes and ponds are critical components of methane release
作者: Wik M.; Varner R.K.; Anthony K.W.; MacIntyre S.; Bastviken D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:2
起始页码: 99
结束页码: 105
语种: 英语
Scopus关键词: boreal forest ; climate change ; emission inventory ; flux measurement ; greenhouse gas ; lake ecosystem ; methane ; permafrost ; pond ; Postglacial ; surface area ; thermokarst ; warming
英文摘要: Lakes and ponds represent one of the largest natural sources of the greenhouse gas methane. By surface area, almost half of these waters are located in the boreal region and northwards. A synthesis of measurements of methane emissions from 733 lakes and ponds north of ~50° N, combined with new inventories of inland waters, reveals that emissions from these high latitudes amount to around 16.5 Tg CH4 yr-1 (12.4 Tg CH4-C yr-1). This estimate-from lakes and ponds alone-is equivalent to roughly two-thirds of the inverse model calculation of all natural methane sources in the region. Thermokarst water bodies have received attention for their high emission rates, but we find that post-glacial lakes are a larger regional source due to their larger areal extent. Water body depth, sediment type and ecoclimatic region are also important in explaining variation in methane fluxes. Depending on whether warming and permafrost thaw cause expansion or contraction of lake and pond areal coverage, we estimate that annual water body emissions will increase by 20-54% before the end of the century if ice-free seasons are extended by 20 days. We conclude that lakes and ponds are a dominant methane source at high northern latitudes. © 2016 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106091
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Geological Sciences, Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Institute for the Study of Earth, Oceans and Space, Department of Earth Sciences, University of New Hampshire, 8 College Road, Durham, NH, United States; Water and Environmental Research Center, University of Alaska Fairbanks, PO Box 755860, Fairbanks, AK, United States; Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, United States; Department of Thematic Studies-Environmental Change, Linkoping University, Linkoping, Sweden

Recommended Citation:
Wik M.,Varner R.K.,Anthony K.W.,et al. Climate-sensitive northern lakes and ponds are critical components of methane release[J]. Nature Geoscience,2016-01-01,9(2)
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