globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1618567114
论文题名:
Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra
作者: Commane R.; Lindaas J.; Benmergui J.; Luus K.A.; Chang R.Y.-W.; Daube B.C.; Euskirchen E.S.; Henderson J.M.; Karion A.; Miller J.B.; Miller S.M.; Parazoo N.C.; Randerson J.T.; Sweeney C.; Tans P.; Thoning K.; Veraverbeke S.; Miller C.E.; Wofsy S.C.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2017
卷: 114, 期:21
起始页码: 5361
结束页码: 5366
语种: 英语
英文关键词: Alaska ; Arctic ; Carbon dioxide ; Early winter respiration ; Tundra
Scopus关键词: carbon dioxide ; aircraft ; Alaska ; arctic tundra ; Article ; atmosphere ; carbon source ; climate change ; ecosystem ; greenhouse effect ; priority journal ; remote sensing ; summer ; temperature ; winter
英文摘要: High-latitude ecosystems have the capacity to release large amounts of carbon dioxide (CO2) to the atmosphere in response to increasing temperatures, representing a potentially significant positive feedback within the climate system. Here, we combine aircraft and tower observations of atmospheric CO2 with remote sensing data and meteorological products to derive temporally and spatially resolved year-round CO2 fluxes across Alaska during 2012-2014. We find that tundra ecosystems were a net source of CO2 to the atmosphere annually, with especially high rates of respiration during early winter (October through December). Long-term records at Barrow, AK, suggest that CO2 emission rates from North Slope tundra have increased during the October through December period by 73% ± 11% since 1975, and are correlated with rising summer temperatures. Together, these results imply increasing early winter respiration and net annual emission of CO2 in Alaska, in response to climate warming. Our results provide evidence that the decadalscale increase in the amplitude of the CO2 seasonal cycle may be linked with increasing biogenic emissions in the Arctic, following the growing season. Early winter respirationwas not well simulated by the Earth System Models used to forecast future carbon fluxes in recent climate assessments. Therefore, these assessments may underestimate the carbon release from Arctic soils in response to a warming climate.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162194
Appears in Collections:气候变化与战略

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作者单位: Commane, R., Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, United States, Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; Lindaas, J., Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; Benmergui, J., Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, United States; Luus, K.A., Center for Applied Data Analytics, Dublin Institute of Technology, Dublin 2, Ireland; Chang, R.Y.-W., Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 4R2, Canada; Daube, B.C., Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, United States, Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; Euskirchen, E.S., Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Henderson, J.M., Atmospheric and Environmental Research Inc., Lexington, MA 02421, United States; Karion, A., Cooperative Institute of Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States; Miller, J.B., Global Monitoring Division, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Miller, S.M., Carnegie Institution for Science, Stanford, CA 94305, United States; Parazoo, N.C., Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA 90095, United States, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Randerson, J.T., Department of Earth System Science, University of California, Irvine, CA 92697, United States; Sweeney, C., Cooperative Institute of Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States, Earth Science Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Tans, P., Earth Science Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Thoning, K., Earth Science Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Veraverbeke, S., Department of Earth System Science, University of California, Irvine, CA 92697, United States, Faculty of Earth and Life Sciences, Vrije Universiteit, Amsterdam, 1081 HV, Netherlands; Miller, C.E., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Wofsy, S.C., Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, United States, Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States

Recommended Citation:
Commane R.,Lindaas J.,Benmergui J.,et al. Carbon dioxide sources from Alaska driven by increasing early winter respiration from Arctic tundra[J]. Proceedings of the National Academy of Sciences of the United States of America,2017-01-01,114(21)
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