globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015JD024358
论文题名:
Measurements of hydroxyl and hydroperoxy radicals during CalNex-LA: Model comparisons and radical budgets
作者: Griffith S.M.; Hansen R.F.; Dusanter S.; Michoud V.; Gilman J.B.; Kuster W.C.; Veres P.R.; Graus M.; De Gouw J.A.; Roberts J.; Young C.; Washenfelder R.; Brown S.S.; Thalman R.; Waxman E.; Volkamer R.; Tsai C.; Stutz J.; Flynn J.H.; Grossberg N.; Lefer B.; Alvarez S.L.; Rappenglueck B.; Mielke L.H.; Osthoff H.D.; Stevens P.S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:8
起始页码: 4211
结束页码: 4232
语种: 英语
英文关键词: CalNex ; hydroxyl radical ; ozone production ; peroxy radical
Scopus关键词: atmospheric chemistry ; carbonyl compound ; chemical compound ; formaldehyde ; hydroxyl radical ; measurement method ; nitric oxide ; ozone ; photolysis ; radiation budget ; volatile organic compound ; California ; Pasadena ; United States
英文摘要: Measurements of hydroxyl (OH) and hydroperoxy (HO2∗) radical concentrations were made at the Pasadena ground site during the CalNex-LA 2010 campaign using the laser-induced fluorescence-fluorescence assay by gas expansion technique. The measured concentrations of OH and HO2∗ exhibited a distinct weekend effect, with higher radical concentrations observed on the weekends corresponding to lower levels of nitrogen oxides (NOx). The radical measurements were compared to results from a zero-dimensional model using the Regional Atmospheric Chemical Mechanism-2 constrained by NOx and other measured trace gases. The chemical model overpredicted measured OH concentrations during the weekends by a factor of approximately 1.4 ± 0.3 (1σ), but the agreement was better during the weekdays (ratio of 1.0 ± 0.2). Model predicted HO2∗ concentrations underpredicted by a factor of 1.3 ± 0.2 on the weekends, while measured weekday concentrations were underpredicted by a factor of 3.0 ± 0.5. However, increasing the modeled OH reactivity to match the measured total OH reactivity improved the overall agreement for both OH and HO2∗ on all days. A radical budget analysis suggests that photolysis of carbonyls and formaldehyde together accounted for approximately 40% of radical initiation with photolysis of nitrous acid accounting for 30% at the measurement height and ozone photolysis contributing less than 20%. An analysis of the ozone production sensitivity reveals that during the week, ozone production was limited by volatile organic compounds throughout the day during the campaign but NOx limited during the afternoon on the weekends. ©2016. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62913
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: School of Public and Environmental Affairs, Indiana University, Bloomington, IN, United States; Now at Department of Chemistry, Hong Kong University of Science and Technology, Hong Kong, Hong Kong; Department of Chemistry, Indiana University, Bloomington, IN, United States; School of Chemistry, University of Leeds, Leeds, United Kingdom; Mines Douai, SAGE, Douai, France; Université de Lille, Lille, France; LISA/IPSL, Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Créteil, France; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Aeronautic Administration, Boulder, CO, United States; Institute of Atmospheric and Cryospheric Sciences, Innsbruck University, Innsbruck, Austria; Now at Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada; Department of Chemistry and Biochemistry and CIRES, University of Colorado Boulder, Boulder, CO, United States; Department of Chemistry, Snow College, Ephraim, UT, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, United States; Earth Science Division, NASA Headquarters, Washington, DC, United States; Department of Chemistry, University of Calgary, Calgary, AB, Canada; Department of Chemistry, University of Indianapolis, Indianapolis, IN, United States

Recommended Citation:
Griffith S.M.,Hansen R.F.,Dusanter S.,et al. Measurements of hydroxyl and hydroperoxy radicals during CalNex-LA: Model comparisons and radical budgets[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(8)
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