气候变化领域集成服务门户(CCPortal): Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics

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DOI	10.1029/2020GL088875
	Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics
	Feng X.; Deventer M.J.; Lonchar R.; Ng G.H.C.; Sebestyen S.D.; Roman D.T.; Griffis T.J.; Millet D.B.; Kolka R.K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Peatlands are among the largest natural sources of atmospheric methane (CH4) worldwide. Peatland emissions are projected to increase under climate change, as rising temperatures and shifting precipitation accelerate microbial metabolic pathways favorable for CH4 production. However, how these changing environmental factors will impact peatland emissions over the long term remains unknown. Here, we investigate a novel data set spanning an exceptionally long 11 years to analyze the influence of soil temperature and water table elevation on peatland CH4 emissions. We show that higher water tables dampen the springtime increases in CH4 emissions as well as their subsequent decreases during late summer to fall. These results imply that any hydroclimatological changes in northern peatlands that shift seasonal water availability from winter to summer will increase annual CH4 emissions, even if temperature remains unchanged. Therefore, advancing hydrological understanding in peatland watersheds will be crucial for improving predictions of CH4 emissions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric chemistry; Climate change; Groundwater; Methane; Atmospheric methanes; Climate sensitivity; Environmental factors; Metabolic pathways; Methane emissions; Rising temperatures; Water availability; Water table elevation; Wetlands; damping; hydrological regime; methane; peatland; seasonality; soil temperature; water availability; water table
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169818
作者单位	Department of Civil, Environmental, and Geo- Engineering, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Saint Anthony Falls Laboratory, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Department of Soil, Water, and Climate, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Department of Earth and Environmental Sciences, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Northern Research Station, USDA Forest Service, St. Paul, MN, United States
推荐引用方式 GB/T 7714	Feng X.,Deventer M.J.,Lonchar R.,et al. Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics[J],2020,47(17).
APA	Feng X..,Deventer M.J..,Lonchar R..,Ng G.H.C..,Sebestyen S.D..,...&Kolka R.K..(2020).Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics.Geophysical Research Letters,47(17).
MLA	Feng X.,et al."Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics".Geophysical Research Letters 47.17(2020).