气候变化领域集成服务门户(CCPortal): The uncertain climate footprint of wetlands under human pressure

CCPortal

DOI	10.1073/pnas.1416267112
	The uncertain climate footprint of wetlands under human pressure
	Petrescu A.M.R.; Lohila A.; Tuovinen J.-P.; Baldocchi D.D.; Desai A.R.; Roulet N.T.; Vesala T.; Dolman A.J.; Oechel W.C.; Marcolla B.; Friborg T.; Rinne J.; Matthes J.H.; Merbold L.; Meijide A.; Kiely G.; Sottocornola M.; Sachs T.; Zona D.; Varlagin A.; Lai D.Y.F.; Veenendaal E.; Parmentier F.-J.W.; Skiba U.; Lund M.; Hensen A.; Van Huissteden J.; Flanagan L.B.; Shurpali N.J.; Grünwald T.; Humphreys E.R.; Jackowicz-Korczyński M.; Aurela M.A.; Laurila T.; Grüning C.; Corradi C.A.R.; Schrier-Uijl A.P.; Christensen T.R.; Tamstorf M.P.; Mastepanov M.; Martikainen P.J.; Verma S.B.; Bernhofer C.; Cescatti A.
发表日期	2015
ISSN	0027-8424
起始页码	4594
结束页码	4599
卷号	112 期号:15
英文摘要	Significant climate risks are associated with a positive carbon-temperature feedback in northern latitude carbon-rich ecosystems, making an accurate analysis of human impacts on the net greenhouse gas balance of wetlands a priority. Here, we provide a coherent assessment of the climate footprint of a network of wetland sites based on simultaneous and quasi-continuous ecosystem observations of CO2 and CH4 fluxes. Experimental areas are located both in natural and in managed wetlands and cover a wide range of climatic regions, ecosystem types, and management practices. Based on direct observations we predict that sustained CH4 emissions in natural ecosystems are in the long term (i.e., several centuries) typically offset by CO2 uptake, although with large spatiotemporal variability. Using a space-for-time analogy across ecological and climatic gradients, we represent the chronosequence from natural to managed conditions to quantify the "cost" of CH4 emissions for the benefit of net carbon sequestration. With a sustained pulse-response radiative forcing model, we found a significant increase in atmospheric forcing due to land management, in particular for wetland converted to cropland. Our results quantify the role of human activities on the climate footprint of northern wetlands and call for development of active mitigation strategies for managed wetlands and new guidelines of the Intergovernmental Panel on Climate Change (IPCC) accounting for both sustained CH4 emissions and cumulative CO2 exchange. © 2015, National Academy of Sciences. All rights reserved.
英文关键词	Carbon dioxide; Methane; Radiative forcing; Wetland conversion
语种	英语
scopus关键词	carbon dioxide; methane; nitrous oxide; Article; carbon footprint; carbon sequestration; chronosequence; climate; climate change; climate footprint; ecosystem; environmental impact; human; human activities; priority journal; radiation attenuation; spatiotemporal analysis; wetland; classification; climate change; ecology; ecosystem; geography; metabolism; plant; procedures; temperature; theoretical model; uncertainty; Carbon Dioxide; Climate; Climate Change; Ecology; Ecosystem; Geography; Human Activities; Humans; Methane; Models, Theoretical; Nitrous Oxide; Plants; Temperature; Uncertainty; Wetlands
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158983
作者单位	Petrescu, A.M.R., European Commission, Joint Research Center, Institute for Environment and Sustainability, Ispra (VA), 21027, Italy; Lohila, A., Atmospheric Composition Research, Finnish Meteorological Institute, Helsinki, FI-00101, Finland; Tuovinen, J.-P., Atmospheric Composition Research, Finnish Meteorological Institute, Helsinki, FI-00101, Finland; Baldocchi, D.D., Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States; Desai, A.R., Atmospheric and Oceanic Sciences Department, University of Wisconsin-Madison, Madison, WI 53706, United States; Roulet, N.T., Department of Geography, Global Environmental and Climate Change Research Centre, McGill University, Montreal, QC H3A 2K6, Canada; Vesala, T., Department of Physics, University of Helsinki, Helsinki, FIN-00014, Finland, Department of Forest Sciences, University of Helsinki, Helsinki, FIN-00014, Finland; Dolman, A.J., Department of Earth Sciences, Earth and Climate Cluster, VU Uni...
推荐引用方式 GB/T 7714	Petrescu A.M.R.,Lohila A.,Tuovinen J.-P.,et al. The uncertain climate footprint of wetlands under human pressure[J],2015,112(15).
APA	Petrescu A.M.R..,Lohila A..,Tuovinen J.-P..,Baldocchi D.D..,Desai A.R..,...&Cescatti A..(2015).The uncertain climate footprint of wetlands under human pressure.Proceedings of the National Academy of Sciences of the United States of America,112(15).
MLA	Petrescu A.M.R.,et al."The uncertain climate footprint of wetlands under human pressure".Proceedings of the National Academy of Sciences of the United States of America 112.15(2015).