globalchange  > 气候变化事实与影响
DOI: 10.1002/2013GB004644
Scopus记录号: 2-s2.0-84894549037
论文题名:
Constraining surface carbon fluxes using in situ measurements of carbonyl sulfide and carbon dioxide
作者: Berkelhammer M; , Asaf D; , Still C; , Montzka S; , Noone D; , Gupta M; , Provencal R; , Chen H; , Yakir D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期:2
起始页码: 161
结束页码: 179
语种: 英语
英文关键词: carbon budget ; carbonyl sulfide ; instrument development ; laser absorption spectrometry ; surface fluxes
Scopus关键词: Absorption spectroscopy ; Air entrainment ; Budget control ; Carbon ; Forestry ; Soils ; Spectrometers ; Sulfur compounds ; Carbon budgets ; Carbonyl sulfide ; Instrument development ; Laser absorption ; Surface flux ; Carbon dioxide ; absorption ; carbon budget ; carbon dioxide ; carbon flux ; emission ; grassland ; in situ measurement ; photosynthesis ; primary production ; riparian vegetation ; stomatal conductance ; sulfide ; vegetation structure ; Tracheophyta
英文摘要: Understanding the processes that control the terrestrial exchange of carbon is critical for assessing atmospheric CO2 budgets. Carbonyl sulfide (COS) is taken up by vegetation during photosynthesis following a pathway that mirrors CO2 but has a small or nonexistent emission component, providing a possible tracer for gross primary production. Field measurements of COS and CO2 mixing ratios were made in forest, senescent grassland, and riparian ecosystems using a laser absorption spectrometer installed in a mobile trailer. Measurements of leaf fluxes with a branch-bag gas-exchange system were made across species from 10 genera of trees, and soil fluxes were measured with a flow-through chamber. These data show (1) the existence of a narrow normalized daytime uptake ratio of COS to CO2 across vascular plant species of 1.7, providing critical information for the application of COS to estimate photosynthetic CO2 fluxes and (2) a temperature-dependent normalized uptake ratio of COS to CO2 from soils. Significant nighttime uptake of COS was observed in broad-leafed species and revealed active stomatal opening prior to sunrise. Continuous high-resolution joint measurements of COS and CO2 concentrations in the boundary layer are used here alongside the flux measurements to partition the influence that leaf and soil fluxes and entrainment of air from above have on the surface carbon budget. The results provide a number of critical constraints on the processes that control surface COS exchange, which can be used to diagnose the robustness of global models that are beginning to use COS to constrain terrestrial carbon exchange. Key Points Carbonyl sulfide can be measured in situ using a laser absorption spectrometer Ratio of COS to CO2 fluxes from soils and plants converge on a normalized value Soil and plant CO2 fluxes can be partitioned using ambient COS and CO2 conc ©2014. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77471
Appears in Collections:气候变化事实与影响

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作者单位: Department of Atmospheric and Oceanic Sciences, Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder CO, United States; Department of Earth and Environmental Sciences, University of Illinois, Chicago IL, United States; Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, Rehovot, Israel; Forest Ecosystems and Society, Oregon State University, Corvallis OR, United States; Earth System Research Laboratory, Global Monitoring Division, National Oceanic and Atmospheric Administration, Boulder CO, United States; Los Gatos Research Inc., Mountain View CA, United States; Center for Isotope Research, University of Groningen, Groningen, Netherlands; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder CO, United States

Recommended Citation:
Berkelhammer M,, Asaf D,, Still C,et al. Constraining surface carbon fluxes using in situ measurements of carbonyl sulfide and carbon dioxide[J]. Global Biogeochemical Cycles,2014-01-01,28(2)
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