<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Deng, Yuanyuan</style></author><author><style face="normal" font="default" size="100%">Jing Li</style></author><author><style face="normal" font="default" size="100%">Li, Yaqi</style></author><author><style face="normal" font="default" size="100%">Wu, Rongrong</style></author><author><style face="normal" font="default" size="100%">Shaodong Xie</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Characteristics of volatile organic compounds, NO2, and effects on ozone formation at a site with high ozone level in Chengdu</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Environmental Sciences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2018</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S1001074217335532</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Elsevier</style></publisher><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span&gt;Chengdu is a&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/megacity&quot; title=&quot;Learn more about megacity&quot;&gt;megacity&lt;/a&gt;&lt;span&gt;&amp;nbsp;in the southwest of China with high&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ozone&quot; title=&quot;Learn more about ozone&quot;&gt;ozone&lt;/a&gt;&amp;nbsp;(O&lt;/span&gt;&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;)&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/mixing-ratios&quot; title=&quot;Learn more about mixing ratios&quot;&gt;mixing ratio&lt;/a&gt;. Observation of volatile organic compounds (VOCs), NO&lt;/span&gt;&lt;span&gt;2&lt;/span&gt;&lt;span&gt;&amp;nbsp;and O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;with high&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/temporal-resolution&quot; title=&quot;Learn more about temporal resolution&quot;&gt;temporal resolution&lt;/a&gt;&amp;nbsp;was conducted in Chengdu to investigate the&amp;nbsp;&lt;/span&gt;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/chemical-process&quot; title=&quot;Learn more about chemical process&quot;&gt;chemical processes&lt;/a&gt;&amp;nbsp;and causes of high O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;levels. The hourly mixing ratios of VOCs, NO&lt;/span&gt;&lt;span&gt;2&lt;/span&gt;&lt;span&gt;, and O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;were monitored by an online system from 28 August to 7 October, 2016. According to meteorological conditions, Chengdu, with relative warm weather and low wind speed, is favorable to O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;formation. Part of the O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;in Chengdu may be transported from the downtown area. In O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;episodes, the average mixing ratios of NO&lt;/span&gt;&lt;span&gt;2&lt;/span&gt;&lt;span&gt;&amp;nbsp;and O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;were 20.20 ppbv and 47.95 ppbv, respectively. In non-O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;episodes, the average mixing ratios of NO&lt;/span&gt;&lt;span&gt;2&lt;/span&gt;&lt;span&gt;&amp;nbsp;and O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;were 16.38 ppbv and 35.15 ppbv, respectively. The average mixing ratio of total VOCs (TVOCs) was 40.29 ppbv in non-O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;episodes, which was lower than that in O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;episodes (53.19 ppbv).&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/alkenes&quot; title=&quot;Learn more about alkenes&quot;&gt;Alkenes&lt;/a&gt;&amp;nbsp;comprised 51.7% of the total O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;nbsp;formation potential (OFP) in Chengdu, followed by aromatics which accounted for 24.2%.&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ethylene&quot; title=&quot;Learn more about ethylene&quot;&gt;Ethylene&lt;/a&gt;, trans-pentene, propene, and BTEX (benzene, ethylbenzene,&amp;nbsp;&lt;/span&gt;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/toluene&quot; title=&quot;Learn more about Toluene&quot;&gt;toluene&lt;/a&gt;, m/p-xylene, o-xylene) were also major contributors to the OFP in Chengdu. In O&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;episodes, intensive secondary formations were observed during the campaign. Oxygenated VOCs (OVOCs), such as&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/acetone&quot; title=&quot;Learn more about acetone&quot;&gt;acetone&lt;/a&gt;&lt;span&gt;, Methylethylketone (MEK), and Methylvinylketone (MVK) were abundant.&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/isoprene&quot; title=&quot;Learn more about isoprene&quot;&gt;Isoprene&lt;/a&gt;&amp;nbsp;rapidly converted to MVK and Methacrolein (MACR) during O&lt;/span&gt;&lt;/span&gt;&lt;span&gt;3&lt;/span&gt;&lt;span&gt;&amp;nbsp;episodes. Acetone was mainly the&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/oxidant&quot; title=&quot;Learn more about oxidant&quot;&gt;oxidant&lt;/a&gt;&lt;span&gt;&amp;nbsp;of C3-C5&amp;nbsp;&lt;a href=&quot;https://www.sciencedirect.com/topics/earth-and-planetary-sciences/hydrocarbon&quot; title=&quot;Learn more about Hydrocarbon&quot;&gt;hydrocarbons&lt;/a&gt;.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</style></abstract></record></records></xml>