DOI: 10.1016/j.atmosenv.2014.08.018
Scopus记录号: 2-s2.0-84906331398
论文题名: Sources and sinks of carbon dioxide in a neighborhood of Mexico City
作者: Velasco E ; , Perrusquia R ; , Jiménez E ; , Hernández F ; , Camacho P ; , Rodríguez S ; , Retama A ; , Molina L ; T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 97 起始页码: 226
结束页码: 238
语种: 英语
英文关键词: Carbon dioxide
; Carbon sequestration
; Eddy covariance
; Emissions inventory
; Urban emissions of greenhouse gases
Scopus关键词: Agglomeration
; Carbon dioxide
; Forestry
; Allometric equations
; Carbon sequestration
; Eddy covariance
; Emission inventories
; Emissions inventory
; Greenhouse gases (GHG)
; Seasonal variability
; Urban emissions
; Mexico City
; Greenhouse gases
; Carbon dioxide
; carbon dioxide
; allometry
; carbon dioxide
; carbon emission
; carbon sequestration
; data set
; eddy covariance
; emission inventory
; environmental monitoring
; fossil fuel
; greenhouse gas
; neighborhood
; policy making
; pollutant source
; seasonal variation
; soil respiration
; anthropogenic source
; atmospheric pollution
; fuel consumption
; source-sink dynamics
; traffic emission
; urbanization
; article
; biomass
; breathing
; circadian rhythm
; combustion
; Eddy covariance
; exhaust gas
; human
; Mexico
; neighborhood
; priority journal
; soil respiration
; vegetation
; Article
; carbon sequestration
; carbon sink
; carbon source
; climate
; land use
; population density
; seasonal variation
; tree
; tree growth
; urban area
; weather
; Agglomeration
; Carbon Dioxide
; Chelation
; Forestry
; Greenhouse Gases
; Federal District [Mexico]
; Mexico City
; Mexico [North America]
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: Cities are the main contributors to the CO2 rise in the atmosphere. The CO2 released from the various emission sources is typically quantified by a bottom-up aggregation process that accounts for emission factors and fossil fuel consumption data. This approach does not consider the heterogeneity and variability of the urban emission sources, and error propagation can result in large uncertainties. These uncertainties might lead to unsound mitigation policies. Monitoring systems of greenhouse gases (GHG) based on independent methods are needed to validate the accuracy of the estimated emissions. In this context, direct measurements of CO2 fluxes that include all major and minor anthropogenic and natural sources and sinks from a specific district can be used to evaluate emission inventories. This study reports and compares CO2 fluxes measured directly using the eddy covariance (EC) method with emissions taken from the gridded local emissions inventory for the footprint covered by the EC flux system for a residential/commercial neighborhood of Mexico City. The flux measurements were conducted over 15-month period. No seasonal variability was found, but a clear diurnal pattern with morning and evening peaks in phase with the rush-hour traffic was observed. After adding contributions from human and soil respiration obtained by bottom-up approaches, and subtracting the CO2 sequestrated by vegetation calculated by applying biomass allometric equations and a growth predictive model to trees inventoried within the studied domain, results show that the current emissions inventory over-predicts 2.8 times the average daily flux measured on weekdays. Using traffic emissions data from a 2-year older inventory the difference decreased to 30%, suggesting that the traffic load for this part of the city is probably highly overestimated in the current emissions inventory. This study is expected to contribute to the verification capabilities of the GHG mitigation management of Mexico City, and to serve as a reference for other subtropical cities with similar urbanization patterns. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81319
Appears in Collections: 气候变化事实与影响
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作者单位: Singapore-MIT Alliance for Research and Technology (SMART), Center for Environmental Sensing and Modeling (CENSAM), Singapore; National Institute of Ecology and Climate Change, National Center for Environmental Research and Training, DF, Mexico; Secretary of Environment, Federal District Government, DF, Mexico; Molina Center for Energy and the Environment (MCE2), La Jolla, CA, United States; Secretary of Environment and Natural Resources, DF, Mexico; Commission for Environmental Cooperation of North America, DF, Mexico
Recommended Citation:
Velasco E,, Perrusquia R,, Jiménez E,et al. Sources and sinks of carbon dioxide in a neighborhood of Mexico City[J]. Atmospheric Environment,2014-01-01,97