葡萄牙FIELDVOC'94活动期间的非甲烷烃变化

B. Bonsang , M. Kanakidou
{"title":"葡萄牙FIELDVOC'94活动期间的非甲烷烃变化","authors":"B. Bonsang ,&nbsp;M. Kanakidou","doi":"10.1016/S1465-9972(01)00009-5","DOIUrl":null,"url":null,"abstract":"<div><p>C<sub>2</sub>–C<sub>6</sub> non-methane hydrocarbons (NMHC), including isoprene, were measured in a forested area of Portugal from June 20 to July 12, 1994 as part of the FIELDVOC'94 project. The day-to-day variability of the measured NMHC was clearly linked to the air mass origin. The longest-lived ethane did not show any significant diurnal variation. The diurnal variability of the C<sub>3</sub>–C<sub>5</sub> alkanes and of acetylene presented low amplitude attributed to the changeable wind direction between northwest and southeast. The short-lived alkenes showed a well-defined diurnal variation with maximum mixing ratios during night-time and minimum during daytime resulting from both dynamical and photochemical sinks. Isoprene presented a very different trend with minima of 0.1 ppbv at night and maxima up to 12 ppbv occurring between 16:00 and 18:00 (UT). In continental air masses, the contribution of isoprene to the daytime ozone production was 3- to 6-fold greater than that of the other NMHC. In air masses of marine origin, the effect of isoprene on ozone and hydroxyl radicals was significantly reduced relative to the anthropogenic NMHC, which were dominating at night. In all cases, isoprene was a more efficient consumer of nitrate radicals than these NMHC. The observed decrease of isoprene at night was consistent with the measured nitrate radical mixing ratios of a few pptv.</p></div>","PeriodicalId":100235,"journal":{"name":"Chemosphere - Global Change Science","volume":"3 3","pages":"Pages 259-273"},"PeriodicalIF":0.0000,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1465-9972(01)00009-5","citationCount":"17","resultStr":"{\"title\":\"Non-methane hydrocarbon variability during the FIELDVOC'94 campaign in Portugal\",\"authors\":\"B. Bonsang ,&nbsp;M. Kanakidou\",\"doi\":\"10.1016/S1465-9972(01)00009-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>C<sub>2</sub>–C<sub>6</sub> non-methane hydrocarbons (NMHC), including isoprene, were measured in a forested area of Portugal from June 20 to July 12, 1994 as part of the FIELDVOC'94 project. The day-to-day variability of the measured NMHC was clearly linked to the air mass origin. The longest-lived ethane did not show any significant diurnal variation. The diurnal variability of the C<sub>3</sub>–C<sub>5</sub> alkanes and of acetylene presented low amplitude attributed to the changeable wind direction between northwest and southeast. The short-lived alkenes showed a well-defined diurnal variation with maximum mixing ratios during night-time and minimum during daytime resulting from both dynamical and photochemical sinks. Isoprene presented a very different trend with minima of 0.1 ppbv at night and maxima up to 12 ppbv occurring between 16:00 and 18:00 (UT). In continental air masses, the contribution of isoprene to the daytime ozone production was 3- to 6-fold greater than that of the other NMHC. In air masses of marine origin, the effect of isoprene on ozone and hydroxyl radicals was significantly reduced relative to the anthropogenic NMHC, which were dominating at night. In all cases, isoprene was a more efficient consumer of nitrate radicals than these NMHC. The observed decrease of isoprene at night was consistent with the measured nitrate radical mixing ratios of a few pptv.</p></div>\",\"PeriodicalId\":100235,\"journal\":{\"name\":\"Chemosphere - Global Change Science\",\"volume\":\"3 3\",\"pages\":\"Pages 259-273\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2001-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1465-9972(01)00009-5\",\"citationCount\":\"17\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemosphere - Global Change Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1465997201000095\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemosphere - Global Change Science","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1465997201000095","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 17

摘要

作为FIELDVOC'94项目的一部分,于1994年6月20日至7月12日在葡萄牙的一个森林地区测量了C2-C6非甲烷碳氢化合物(NMHC),包括异戊二烯。测量到的NMHC的每日变化明显与气团起源有关。寿命最长的乙烷没有表现出任何显著的日变化。C3-C5烷烃和乙炔的日变化幅度较小,主要受西北-东南风向变化的影响。由于动力和光化学汇的作用,短寿命烯烃表现出明显的日变化,夜间混合比最大,白天混合比最小。异戊二烯表现出截然不同的趋势,夜间最小值为0.1 ppbv,最大值在16:00 - 18:00 (UT)之间达到12 ppbv。在大陆气团中,异戊二烯对白天臭氧产生的贡献是其他NMHC的3- 6倍。在海洋气团中,相对于人为的NMHC,异戊二烯对臭氧和羟基自由基的影响显著降低,这在夜间占主导地位。在所有情况下,异戊二烯比这些NMHC更有效地消耗硝酸盐自由基。夜间观察到异戊二烯的减少与测量到的硝酸根混合比数pptv相一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Non-methane hydrocarbon variability during the FIELDVOC'94 campaign in Portugal

C2–C6 non-methane hydrocarbons (NMHC), including isoprene, were measured in a forested area of Portugal from June 20 to July 12, 1994 as part of the FIELDVOC'94 project. The day-to-day variability of the measured NMHC was clearly linked to the air mass origin. The longest-lived ethane did not show any significant diurnal variation. The diurnal variability of the C3–C5 alkanes and of acetylene presented low amplitude attributed to the changeable wind direction between northwest and southeast. The short-lived alkenes showed a well-defined diurnal variation with maximum mixing ratios during night-time and minimum during daytime resulting from both dynamical and photochemical sinks. Isoprene presented a very different trend with minima of 0.1 ppbv at night and maxima up to 12 ppbv occurring between 16:00 and 18:00 (UT). In continental air masses, the contribution of isoprene to the daytime ozone production was 3- to 6-fold greater than that of the other NMHC. In air masses of marine origin, the effect of isoprene on ozone and hydroxyl radicals was significantly reduced relative to the anthropogenic NMHC, which were dominating at night. In all cases, isoprene was a more efficient consumer of nitrate radicals than these NMHC. The observed decrease of isoprene at night was consistent with the measured nitrate radical mixing ratios of a few pptv.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信