DOI: 10.1002/2014GL060649
论文题名: Volatility dependence of Henry's law constants of condensable organics: Application to estimate depositional loss of secondary organic aerosols
作者: Hodzic A. ; Aumont B. ; Knote C. ; Lee-Taylor J. ; Madronich S. ; Tyndall G.
刊名: Geophysical Research Letters
ISSN: 0094-10016
EISSN: 1944-9747
出版年: 2014
卷: 41, 期: 13 起始页码: 4795
结束页码: 4804
语种: 英语
英文关键词: dry deposition
; Henry's law constant
; secondary organic aerosol
; water solubility
; wet deposition
Scopus关键词: Aerosols
; Atmospheric chemistry
; Hydrostatic pressure
; Reaction intermediates
; Solubility
; Vapor pressure
; Volatile organic compounds
; Weather forecasting
; Dry deposition
; Henry's Law constant
; Secondary organic aerosols
; Water solubilities
; Wet deposition
; Deposition
英文摘要: The water solubility of oxidation intermediates of volatile organic compounds that can condense to form secondary organic aerosol (SOA) is largely unconstrained in current chemistry-climate models. We apply the Generator of Explicit Chemistry and Kinetics of Organics in the Atmosphere to calculate Henry's law constants for these intermediate species. Results show a strong negative correlation between Henry's law constants and saturation vapor pressures. Details depend on precursor species, extent of photochemical processing, and NOx levels. Henry's law constants as a function of volatility are made available over a wide range of vapor pressures for use in 3-D models. In an application using the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) over the U.S. in summer, we find that dry (and wet) deposition of condensable organic vapors leads to major reductions in SOA, decreasing surface concentrations by ~50% (10%) for biogenic and ~40% (6%) for short chain anthropogenic precursors under the considered volatility conditions. Key Points Water solubility of organic vapors is correlated to their vapor pressures Henry's law constants as a function of volatility are provided for 3-D models Dry/wet deposition of condensable organic gases mediates atmospheric SOA loss ©2014. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904079547&doi=10.1002%2f2014GL060649&partnerID=40&md5=b17c5b8516773d6457c8d8460dd98dfc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7280
Appears in Collections: 气候减缓与适应
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作者单位: NCAR, Boulder CO, United States
Recommended Citation:
Hodzic A.,Aumont B.,Knote C.,et al. Volatility dependence of Henry's law constants of condensable organics: Application to estimate depositional loss of secondary organic aerosols[J]. Geophysical Research Letters,2014-01-01,41(13).