DOI: 10.1016/j.atmosenv.2015.01.046
Scopus记录号: 2-s2.0-84955733051
论文题名: Implementation and refinement of a surface model for heterogeneous HONO formation in a 3-D chemical transport model
作者: Karamchandani P ; , Emery C ; , Yarwood G ; , Lefer B ; , Stutz J ; , Couzo E ; , Vizuete W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 112 起始页码: 356
结束页码: 368
语种: 英语
英文关键词: Air quality model
; CAMx
; Heterogeneous formation
; Houston
; Nitrous acid
; Surface model
Scopus关键词: Aerosols
; Air quality
; Boundary layers
; Budget control
; Degradation
; Nitrogen oxides
; Ozone
; Photolysis
; Surface reactions
; Air quality modeling
; CAMx
; Heterogeneous formation
; Houston
; Nitrous acid
; Surface modeling
; Inorganic acids
; chemical compound
; hydroxyl radical
; nitrous acid
; ozone
; air quality
; hydroxyl radical
; nitrous oxide
; parameterization
; particulate matter
; photochemistry
; photolysis
; three-dimensional modeling
; urban atmosphere
; adaptation
; aerosol
; air quality
; Article
; atmosphere
; boundary layer
; data base
; degradation
; particulate matter
; photolysis
; priority journal
; simulation
; time series analysis
; urban area
; vegetation
; volatilization
; Houston
; Texas
; 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: The photolysis of nitrous acid (HONO) is a potentially significant daytime source of the hydroxyl radical, OH, one of the main chemical species that controls the oxidizing capacity of the atmosphere and plays an important role in ozone and PM2.5 formation. Research based on both field measurements and modeling has shown that HONO significantly affects the HOx budget in urban environments. Measurements during the Study of Houston Atmospheric Radical Precursors (SHARP) showed that radical production in the early morning in Houston was dominated by HONO photolysis. Field and laboratory studies suggest that nighttime heterogeneous conversion of NO2 on ground or aerosol surfaces, as well as daytime photolysis of HNO3 and NO2 adsorbed onto ground surfaces, can be important sources of HONO. Air quality models that only simulate homogeneous formation of HONO have been shown to substantially under-estimate observed HONO concentrations. Direct emissions of HONO also cannot explain the high HONO:NO2 ratios often measured in the boundary layer. These findings indicate that heterogeneous HONO formation plays an important role in the atmosphere. Previous approaches to include heterogeneous HONO formation in photochemical models have used surface to volume ratios to parameterize the chemistry on ground and aerosol surfaces. This paper describes the adaptation of a photochemical model to explicitly include a surface model that allows the treatment of the surface as a reservoir of deposited species that can be sorbed or penetrate into soils and vegetation, and undergo chemical degradation and transformation, and volatilization back into the air (re-emissions). The reactions in the surface model include HONO formation from thermal and photolytic reactions of deposited NO2 and HNO3. The parameterizations for surface heterogeneous production of HONO are evaluated and refined using existing modeling databases for the Houston area during the SHARP study period. A companion paper describes the impacts of the new HONO formation pathways on radical sources and ozone chemistry in the Houston area. © 2015 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80632
Appears in Collections: 气候变化事实与影响
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作者单位: ENVIRON International Corporation, Novato, CA, United States; Earth and Atmospheric Sciences Department, University of Houston, Houston, TX, United States; Department of Atmospheric and Oceanic Sciences, University of California-Los Angeles, Los Angeles, CA, United States; Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, NC, United States; Engineering Systems Division, Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Karamchandani P,, Emery C,, Yarwood G,et al. Implementation and refinement of a surface model for heterogeneous HONO formation in a 3-D chemical transport model[J]. Atmospheric Environment,2014-01-01,112