DOI: 10.1016/j.atmosenv.2015.08.055
Scopus记录号: 2-s2.0-84941559310
论文题名: Contrasting regional versus global radiative forcing by megacity pollution emissions
作者: Dang H ; , Unger N
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 119 起始页码: 322
结束页码: 329
语种: 英语
英文关键词: Aerosols
; Black carbon
; Climate change
; Greenhouse gases
; Ozone
; Radiative forcing
Scopus关键词: Aerosols
; Air pollution
; Air quality
; Atmospheric radiation
; Budget control
; Carbon dioxide
; Global warming
; Greenhouse gases
; Ionization of gases
; Nitrogen oxides
; Ozone
; Pollution
; Radiation effects
; Black carbon
; Environmental issues
; Global climate changes
; Pollution emissions
; Radiative forcings
; Safety improvement
; Secondary organic aerosols
; Tropospheric ozone
; Climate change
; black carbon
; carbon dioxide
; methane
; nitrate
; nitrous oxide
; ozone
; sulfate
; aerosol
; air quality
; atmospheric pollution
; black carbon
; carbon dioxide
; emission control
; emission inventory
; global warming
; greenhouse gas
; megacity
; methane
; nitrate
; nitrous oxide
; ozone
; pollution monitoring
; radiation budget
; radiative forcing
; spatiotemporal analysis
; sulfate
; troposphere
; aerosol
; air pollution
; air quality
; Article
; China
; climate change
; Egypt
; exhaust gas
; global climate
; global radiative forcing
; greenhouse effect
; greenhouse gas
; India
; Mexico
; Philippines
; priority journal
; radiative forcing
; regional radiative forcing
; secondary organic aerosol
; United States
; Beijing [China]
; Brazil
; Cairo [Egypt]
; California
; China
; Delhi
; Egypt
; India
; Lagos [Nigeria]
; Los Angeles [California]
; Manila
; Mexico [North America]
; National Capital Region
; New Delhi
; New York [United States]
; Nigeria
; Philippines
; Sao Paulo [Brazil]
; Shanghai
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: We assess the regional and global integrated radiative forcing on 20- and 100-year time horizons caused by a one-year pulse of present day pollution emissions from 10 megacity areas: Los Angeles, Mexico City, New York City, Sao Paulo, Lagos, Cairo, New Delhi, Beijing, Shanghai and Manila. The assessment includes well-mixed greenhouse gases: carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4); and short-lived climate forcers: tropospheric ozone (O3) and fine mode aerosol particles (sulfate, nitrate, black carbon, primary and secondary organic aerosol). All megacities contribute net global warming on both time horizons. Most of the 10 megacity areas exert a net negative effect on their own regional radiation budget that is 10-100 times larger in magnitude than their global radiative effects. Of the cities examined, Beijing, New Delhi, Shanghai and New York contribute most to global warming with values ranging from +0.03 to 0.05 Wm-2yr on short timescales and +0.07-0.10 Wm-2yr on long timescales. Regional net 20-year radiative effects are largest for Mexico City (-0.84 Wm-2yr) and Beijing (-0.78 Wm-2yr). Megacity reduction of non-CH4 O3 precursors to improve air quality offers zero co-benefits to global climate. Megacity reduction of aerosols to improve air quality offers co-benefits to the regional radiative budget but minimal or no co-benefits to global climate with the exception of black carbon reductions in a few cities, especially Beijing and New Delhi. Results suggest that air pollution and global climate change mitigation can be treated as separate environmental issues in policy at the megacity level with the exception of CH4 action. Individual megacity reduction of CO2 and CH4 emissions can mitigate global warming and therefore offers climate safety improvements to the entire planet. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81529
Appears in Collections: 气候变化事实与影响
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作者单位: School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States; Chinese Research Academy of Environmental Sciences, Ministry of Environmental Protection, China
Recommended Citation:
Dang H,, Unger N. Contrasting regional versus global radiative forcing by megacity pollution emissions[J]. Atmospheric Environment,2015-01-01,119