DOI: 10.1002/gbc.20057
Scopus记录号: 2-s2.0-84881282728
论文题名: Response of global soil consumption of atmospheric methane to changes in atmospheric climate and nitrogen deposition
作者: Zhuang Q ; , Chen M ; , Xu K ; , Tang J ; , Saikawa E ; , Lu Y ; , Melillo J ; M ; , Prinn R ; G ; , McGuire A ; D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 3 起始页码: 650
结束页码: 663
语种: 英语
英文关键词: atmospheric methane
; atmospheric transport and chemistry model
; biogeochemistry model
; methanotrophy
; nitrogen deposition
Scopus关键词: Agricultural ecosystems
; Atmospheric methanes
; Chemical transport models
; Chemistry modeling
; Future climate scenarios
; Methanotrophy
; Nitrogen deposition
; Seasonal amplitudes
; Arid regions
; Atmospheric movements
; Biogeochemistry
; Ecosystems
; Methane
; Mixing
; Nitrogen
; Soil moisture
; Atmospheric chemistry
; agricultural ecosystem
; amplitude
; atmospheric deposition
; atmospheric pollution
; biogeochemistry
; concentration (composition)
; hydroxyl radical
; methane
; methanotrophy
; nitrogen
; numerical model
; soil temperature
; woodland
英文摘要: Soil consumption of atmospheric methane plays an important secondary role in regulating the atmospheric CH4 budget, next to the dominant loss mechanism involving reaction with the hydroxyl radical (OH). Here we used a process-based biogeochemistry model to quantify soil consumption during the 20th and 21st centuries. We estimated that global soils consumed 32-36 Tg CH 4 yr-1 during the 1990s. Natural ecosystems accounted for 84% of the total consumption, and agricultural ecosystems only consumed 5 Tg CH4 yr-1 in our estimations. During the twentieth century, the consumption rates increased at 0.03-0.20 Tg CH4 yr-2 with seasonal amplitudes increasing from 1.44 to 3.13 Tg CH4 month-1. Deserts, shrublands, and xeric woodlands were the largest sinks. Atmospheric CH4 concentrations and soil moisture exerted significant effects on the soil consumption while nitrogen deposition had a moderate effect. During the 21st century, the consumption is predicted to increase at 0.05-1.0 Tg CH4 yr-2, and total consumption will reach 45-140 Tg CH4 yr-1 at the end of the 2090s, varying under different future climate scenarios. Dry areas will persist as sinks, boreal ecosystems will become stronger sinks, mainly due to increasing soil temperatures. Nitrogen deposition will modestly reduce the future sink strength at the global scale. When we incorporated the estimated global soil consumption into our chemical transport model simulations, we found that nitrogen deposition suppressed the total methane sink by 26 Tg during the period 1998-2004, resulting in 6.6 ppb higher atmospheric CH4 mixing ratios compared to without considering nitrogen deposition effects. On average, a cumulative increase of every 1 Tg soil CH4 consumption decreased atmospheric CH4 mixing ratios by 0.26 ppb during the period 1998-2004. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77596
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Dr., West Lafayette, IN 47907-2051, United States; Department of Agronomy, Purdue University, West Lafayette, IN, United States; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, United States; Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK, United States
Recommended Citation:
Zhuang Q,, Chen M,, Xu K,et al. Response of global soil consumption of atmospheric methane to changes in atmospheric climate and nitrogen deposition[J]. Global Biogeochemical Cycles,2013-01-01,27(3)