DOI: 10.1002/grl.50267
论文题名: Variations of OH radical in an urban plume inferred from NO2 column measurements
作者: Valin L.C. ; Russell A.R. ; Cohen R.C.
刊名: Geophysical Research Letters
ISSN: 0094-9117
EISSN: 1944-8848
出版年: 2013
卷: 40, 期: 9 起始页码: 1856
结束页码: 1860
语种: 英语
英文关键词: Hydroxyl radical
; Nitrogen oxides
; Satellite-based remote sensing
Scopus关键词: Atmospheric mixing
; Column measurements
; Functional dependence
; Hydroxyl radicals
; Nonlinear dependence
; Riyadh , Saudi Arabia
; Space-based observations
; Spatial patterns
; Atmospheric composition
; Free radicals
; Molecules
; Nitrogen oxides
; atmospheric chemistry
; atmospheric plume
; chemical composition
; concentration (composition)
; hydroxyl radical
; mixing
; nitrogen dioxide
; remote sensing
; satellite imagery
; wind velocity
; Riyadh [Saudi Arabia]
; Saudi Arabia
英文摘要: The evolution of atmospheric composition downwind of a city depends strongly on the concentration of OH within the plume. We use space-based observations of NO2, a molecule that affects both the sources and sinks of OH, to examine the functional dependence of OH concentration on the speed of the wind over Riyadh, Saudi Arabia. These observations illustrate the nonlinear dependence of the OH concentration on NO2 and on the rate of atmospheric mixing. We derive a range of NOx lifetimes of 5.5-8.0 h, lifetimes that correspond to an effective plume-averaged OH concentration of 7.6 × 106 molecules cm-3 at fast (26 km h -1) and 5.2 × 106 molecules cm-3 at slow (4 km h-1) wind speeds. Key PointsThe lifetime of NOx depends on the wind speedNO2 spatial patterns depend on wind speedInferring the NOx lifetime from space requires spatially-detailed measurements ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879074190&doi=10.1002%2fgrl.50267&partnerID=40&md5=8917c6f4aeff828aaf3618f0e61a9b5f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6381
Appears in Collections: 气候减缓与适应
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作者单位: College of Chemistry, University of California Berkeley, Berkeley CA 94720, United States
Recommended Citation:
Valin L.C.,Russell A.R.,Cohen R.C.. Variations of OH radical in an urban plume inferred from NO2 column measurements[J]. Geophysical Research Letters,2013-01-01,40(9).