Arid
DOI10.1029/2011JD016643
Nitrous acid (HONO) during polar spring in Barrow, Alaska: A net source of OH radicals?
Villena, G.1; Wiesen, P.1; Cantrell, C. A.2; Flocke, F.2; Fried, A.2; Hall, S. R.2; Hornbrook, R. S.2; Knapp, D.2; Kosciuch, E.2; Mauldin, R. L., III2,5; McGrath, J. A.2; Montzka, D.2; Richter, D.2; Ullmann, K.2; Walega, J.2; Weibring, P.2; Weinheimer, A.2; Staebler, R. M.4; Liao, J.3; Huey, L. G.3; Kleffmann, J.1
通讯作者Villena, G.
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2011
卷号116
英文摘要

HONO was measured by a LOPAP instrument (LOng Path Absorption Photometer) for one month during the OASIS spring 2009 campaign in Barrow, Alaska. HONO concentrations between <= 0.4 pptv (DL) and similar to 500 pptv were measured. The very high concentrations observed on several days were caused by local direct emissions and were highly correlated with the NOx and CO data. When only "clean days" were considered, average HONO concentrations varied between <= 0.4 - 10 pptv. Average HONO/NOx and HONO/NOy ratios of similar to 6% and similar to 1% were observed, respectively, in good agreement with other remote LOPAP measurement data, but lower than measured in most other polar regions by other methods. The strong correlation between sharp peaks of OH and HONO during daytime, which was not observed for any other measured radical precursor, suggested that HONO photolysis was a major source of OH radicals in Barrow. This was supported by calculated net OH radical production by HONO and O-3 photolysis for which the contribution of O-3 (2%) could be neglected compared to that of HONO (98%). A net extra HONO/OH source necessary to explain elevated HONO levels during daytime of up to 90 pptv/h was determined, which was highly correlated with the actinic flux. Accordingly, a photochemical HONO source is proposed here, in good agreement with recent studies. From the higher correlation of the net HONO source with J(NO2) and [NO2] compared to J(O(1D)) and [NO3-], photosensitized conversion of NO2 on humic acid containing snow surfaces may be a more likely source of HONO in the polar atmosphere of Barrow than nitrate photolysis.


类型Article
语种英语
国家Germany ; USA ; Canada
收录类别SCI-E
WOS记录号WOS:000298496000003
WOS关键词BOUNDARY-LAYER ; SOUTH-POLE ; HIGH-SENSITIVITY ; ANTARCTIC SNOW ; MAJOR SOURCE ; NITRIC-ACID ; HUMIC-ACID ; ANTCI 2003 ; CHEMISTRY ; GREENLAND
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/169200
作者单位1.Univ Wuppertal, FB C, D-42119 Wuppertal, Germany;
2.Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80305 USA;
3.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA;
4.Environm Canada, Toronto, ON M3H 5T4, Canada;
5.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA
推荐引用方式
GB/T 7714
Villena, G.,Wiesen, P.,Cantrell, C. A.,et al. Nitrous acid (HONO) during polar spring in Barrow, Alaska: A net source of OH radicals?[J],2011,116.
APA Villena, G..,Wiesen, P..,Cantrell, C. A..,Flocke, F..,Fried, A..,...&Kleffmann, J..(2011).Nitrous acid (HONO) during polar spring in Barrow, Alaska: A net source of OH radicals?.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,116.
MLA Villena, G.,et al."Nitrous acid (HONO) during polar spring in Barrow, Alaska: A net source of OH radicals?".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 116(2011).
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