气候变化领域集成服务门户(CCPortal): The biophysical climate mitigation potential of boreal peatlands during the growing season

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DOI	10.1088/1748-9326/abab34
	The biophysical climate mitigation potential of boreal peatlands during the growing season
	Helbig M.; Waddington J.M.; Alekseychik P.; Amiro B.; Aurela M.; Barr A.G.; Black T.A.; Carey S.K.; Chen J.; Chi J.; Desai A.R.; Dunn A.; Euskirchen E.S.; Flanagan L.B.; Friborg T.; Garneau M.; Grelle A.; Harder S.; Heliasz M.; Humphreys E.R.; Ikawa H.; Isabelle P.-E.; Iwata H.; Jassal R.; Korkiakoski M.; Kurbatova J.; Kutzbach L.; Lapshina E.; Lindroth A.; Löfvenius M.O.; Lohila A.; Mammarella I.; Marsh P.; Moore P.A.; Maximov T.; Nadeau D.F.; Nicholls E.M.; Nilsson M.B.; Ohta T.; Peichl M.; Petrone R.M.; Prokushkin A.; Quinton W.L.; Roulet N.; Runkle B.R.K.; Sonnentag O.; Strachan I.B.; Taillardat P.; Tuittila E.-S.; Tuovinen J.-P.; Turner J.; Ueyama M.; Varlagin A.; Vesala T.; Wilmking M.; Zyrianov V.; Schulze C.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	Peatlands and forests cover large areas of the boreal biome and are critical for global climate regulation. They also regulate regional climate through heat and water vapour exchange with the atmosphere. Understanding how land-atmosphere interactions in peatlands differ from forests may therefore be crucial for modelling boreal climate system dynamics and for assessing climate benefits of peatland conservation and restoration. To assess the biophysical impacts of peatlands and forests on peak growing season air temperature and humidity, we analysed surface energy fluxes and albedo from 35 peatlands and 37 evergreen needleleaf forests - the dominant boreal forest type - and simulated air temperature and vapour pressure deficit (VPD) over hypothetical homogeneous peatland and forest landscapes. We ran an evapotranspiration model using land surface parameters derived from energy flux observations and coupled an analytical solution for the surface energy balance to an atmospheric boundary layer (ABL) model. We found that peatlands, compared to forests, are characterized by higher growing season albedo, lower aerodynamic conductance, and higher surface conductance for an equivalent VPD. This combination of peatland surface properties results in a ∼20% decrease in afternoon ABL height, a cooling (from 1.7 to 2.5 °C) in afternoon air temperatures, and a decrease in afternoon VPD (from 0.4 to 0.7 kPa) for peatland landscapes compared to forest landscapes. These biophysical climate impacts of peatlands are most pronounced at lower latitudes (∼45°N) and decrease toward the northern limit of the boreal biome (∼70°N). Thus, boreal peatlands have the potential to mitigate the effect of regional climate warming during the growing season. The biophysical climate mitigation potential of peatlands needs to be accounted for when projecting the future climate of the boreal biome, when assessing the climate benefits of conserving pristine boreal peatlands, and when restoring peatlands that have experienced peatland drainage and mining. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	boreal forest; climate mitigation; energy balance; peatlands; regional climate
语种	英语
scopus关键词	Atmospheric boundary layer; Atmospheric humidity; Atmospheric temperature; Biophysics; Conservation; Forestry; Interfacial energy; Solar radiation; Aerodynamic conductances; Climate mitigations; Evapotranspiration modeling; Land atmosphere interaction; Land surface parameters; Surface conductance; Surface energy fluxes; Vapour pressure deficits; Wetlands; climate change; growing season; peatland; terrestrial ecosystem
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153571
作者单位	School of Earth, Environment and Society, McMaster University, Hamilton, ON, Canada; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada; Institute for Atmospheric and Earth System Research/Physics, Faculty of Sciences, University of Helsinki, Helsinki, Finland; Natural Resources Institute Finland (LUKE), Bioeconomy and Environment, Helsinki, Finland; Department of Soil Science, University of Manitoba, Winnipeg, MB, Canada; Finnish Meteorological Institute, Helsinki, Finland; Climate Research Division, Environment and Climate Change Canada, Saskatoon, SK, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, SK, Canada; Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, Canada; Department of Geography, Environment, and Spatial Sciences, Michigan State UniversityMI, United States; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umea, Sweden; Department of Atmospheric Sc...
推荐引用方式 GB/T 7714	Helbig M.,Waddington J.M.,Alekseychik P.,et al. The biophysical climate mitigation potential of boreal peatlands during the growing season[J],2020,15(10).
APA	Helbig M..,Waddington J.M..,Alekseychik P..,Amiro B..,Aurela M..,...&Schulze C..(2020).The biophysical climate mitigation potential of boreal peatlands during the growing season.Environmental Research Letters,15(10).
MLA	Helbig M.,et al."The biophysical climate mitigation potential of boreal peatlands during the growing season".Environmental Research Letters 15.10(2020).