| DOI: | 10.1002/2017MS001196
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| Scopus记录号: | 2-s2.0-85045847477
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| 论文题名: | Methane Feedback on Atmospheric Chemistry: Methods, Models, and Mechanisms |
| 作者: | Holmes C; D
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| 刊名: | Journal of Advances in Modeling Earth Systems
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| ISSN: | 19422466
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| 出版年: | 2018
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| 语种: | 英语
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| 英文关键词: | Atmospheric composition
; Feedback
; Global warming
; Industrial emissions
; Methane
; Oxidants
; Atmospheric methanes
; Emission factors
; Environmental consequences
; Feedback strength
; Global warming potential
; Present value
; Sensitivity tests
; Temporal variation
; Atmospheric chemistry
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| 英文摘要: | The atmospheric methane (CH4) chemical feedback is a key process for understanding the behavior of atmospheric CH4 and its environmental impact. This work reviews how the feedback is defined and used, then examines the meteorological, chemical, and emission factors that control the feedback strength. Geographical and temporal variations in the feedback are described and explained by HOx (HOx=OH+HO2) production and partitioning. Different CH4 boundary conditions used by models, however, make no meaningful difference to the feedback calculation. The strength of the CH4 feedback depends on atmospheric composition, particularly the atmospheric CH4 burden, and is therefore not constant. Sensitivity tests show that the feedback depends very weakly on temperature, insolation, water vapor, and emissions of NO. While the feedback strength has likely remained within 10% of its present value over the industrial era and likely will over the twenty-first century, neglecting these changes biases our understanding of CH4 impacts. Most environmental consequences per kg of CH4 emissions, including its global warming potential (GWP), scale with the perturbation time, which may have grown as much as 40% over the industrial era and continues to rise. © 2018. The Authors. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75667
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| Appears in Collections: | 影响、适应和脆弱性
气候变化与战略
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作者单位: | Earth, Ocean and Atmospheric ScienceFlorida State UniversityTallahassee, Florida USA
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| Recommended Citation: | |
Holmes C,D. Methane Feedback on Atmospheric Chemistry: Methods, Models, and Mechanisms[J]. Journal of Advances in Modeling Earth Systems,2018-01-01
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