DOI: 10.1016/j.atmosenv.2013.11.021
Scopus记录号: 2-s2.0-84891958896
论文题名: Seasonal behavior of non-methane hydrocarbons in the firn air at Summit, Greenland
作者: Helmig D ; , Stephens C ; R ; , Caramore J ; , Hueber J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 85 起始页码: 234
结束页码: 246
语种: 英语
英文关键词: Firn air
; Non-methane hydrocarbons
; Polar atmospheric chemistry
; Snow-photochemistry
Scopus关键词: Ambient air concentration
; Bromine oxidation
; Firn airs
; Measurements of
; Non-methane hydrocarbons
; Photochemical production
; Radical chemistry
; Snow-photochemistry
; Acetylene
; Atmospheric chemistry
; Benzene
; Bromine
; Butane
; Ethylene
; Propylene
; Methane
; acetylene
; benzene
; bromine
; butane
; chlorine
; ethane
; ethylene
; hydrocarbon
; non methane hydrocarbon
; pentane
; propane
; propylene
; unclassified drug
; ambient air
; atmospheric chemistry
; benzene
; bromine
; ethane
; ethylene
; firn
; photochemistry
; polar region
; propane
; seasonality
; snowpack
; air
; ambient air
; article
; chemical reaction
; concentration (parameters)
; firn air
; Greenland
; measurement
; photochemistry
; priority journal
; radical reaction
; seasonal variation
; spring
; summer
; surface property
; Arctic
; Greenland
; Summit
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: Non-methane hydrocarbons (NMHC) were measured in the ambient air and in the snowpack interstitial firn air at ~1m depth continuously for nearly two years at Summit, Greenland, from fall 2008 through summer 2010. Additionally, five firn air depth profiles were conducted to a depth of 3mspanning winter, spring, and summer seasons. Here we report measurements of ethane, ethene, ethyne, propane, propene, i-butane, n-butane, i-pentane, n-pentane, and benzene and discuss the seasonal behavior of these species in the ambient and firn air. The alkanes, ethyne, and benzene in the firn air closely reflect the ambient air concentrations during all the seasons of the year. In spring and summer seasons, ethene and propene were enhanced in the near-surface firn over that in the ambient air, indicating a photochemical production mechanism for these species within the snowpack interstitial air. Evaluation of the NMHC ratios of i-butane/. n-butane, i-pentane/. n-pentane, and benzene/ethyne in both ambient and firn air does not provide evidence for chlorine or bromine radical chemistry significantly affecting these gases, except in a few summer samples, where individual data points may suggest bromine oxidation influence. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80766
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, United States
Recommended Citation:
Helmig D,, Stephens C,R,et al. Seasonal behavior of non-methane hydrocarbons in the firn air at Summit, Greenland[J]. Atmospheric Environment,2014-01-01,85