本文選題：臭氧　切入點(diǎn)：氮氧化物　出處：《中國(guó)環(huán)境科學(xué)》2017年03期

【摘要】：利用2012年中國(guó)氣象局廣州番禺大氣成分站的O_3、NO_x逐時(shí)濃度數(shù)據(jù),廣州觀象臺(tái)逐時(shí)的溫度、相對(duì)濕度以及風(fēng)向風(fēng)速數(shù)據(jù),統(tǒng)計(jì)分析了2012年O_3前體物(NO_x)以及氣象因子對(duì)珠江三角洲(以下簡(jiǎn)稱珠三角)地區(qū)臭氧濃度的影響.研究發(fā)現(xiàn):O_3和NO_x均表現(xiàn)出單峰結(jié)構(gòu)的月變化特征,且分別于10月和3月達(dá)到峰值,為(104.9±68.0)μg/m~3,(131.1±122.1)μg/m~3.O_3的日變化為單峰分布,午后的濃度較高,而NO_x濃度于早晚高峰有增加,且夜間濃度高于白天.NO_x對(duì)O_3有顯著的滴定作用,O_3濃度隨著NO_x濃度的增加呈現(xiàn)指數(shù)形式下降.高溫低濕條件有利于O_3的形成.與NO_x類似,O_3濃度隨著溫度和相對(duì)濕度的增大以指數(shù)形式相應(yīng)的增大和減小.當(dāng)珠三角地區(qū)受偏西風(fēng)控制時(shí),下風(fēng)向地區(qū)的O_3濃度最高,而當(dāng)珠三角地區(qū)盛行偏北風(fēng)時(shí),下風(fēng)向地區(qū)的O_3濃度最低,且該方向所對(duì)應(yīng)的NO_x濃度最高,表明廣州城區(qū)的NO_x對(duì)O_3的滴定作用顯著.珠三角地區(qū)發(fā)生光化學(xué)污染的關(guān)鍵性因子主要為20~40μg/m~3的NO_x濃度,高于27°C的氣溫,低于55%的相對(duì)濕度以及受偏西風(fēng)控制.分析發(fā)現(xiàn)10月份O_3的形成主要受VOCs控制,且烯烴的O_3生成潛勢(shì)貢獻(xiàn)最大,為69%,而烷烴和芳香烴的貢獻(xiàn)分別為15%、16%.
[Abstract]:Using the hourly concentration data of O _ 3N _ x at Guangzhou Panyu Atmospheric composition Station of the China Meteorological Bureau in 2012, the hourly temperature, relative humidity and wind direction and wind speed data of Guangzhou Observatory, The influence of meteorological factors on ozone concentration in Pearl River Delta (Pearl River Delta) was analyzed statistically. The results showed that both O _ 3 and NO_x showed the monthly variation characteristics of single-peak structure. The daily variation of 131.1 鹵122.1 渭 g/m~3.O_3 at 104.9 鹵68.0 渭 g / m ~ (-1) 渭 g/m~3.O_3 in October and March respectively showed a single peak distribution, and the concentration in the afternoon was higher, while the concentration of NO_x increased in the morning and evening. Moreover, the nocturnal concentration is higher than that of day. Nox has a significant titration effect on O _ 3. The concentration of O _ 3 decreases exponentially with the increase of NO_x concentration. High temperature and low humidity are favorable to the formation of O _ 3. The concentration of O _ 3 is similar to that of NO_x with temperature and relative humidity. When the Pearl River Delta region is controlled by the westerly wind, When the northerly wind is prevailing in the Pearl River Delta, the concentration of O _ 3 in the downwind area is the lowest, and the corresponding NO_x concentration in this direction is the highest. The results showed that the titration effect of NO_x on O _ 3 in Guangzhou urban area was remarkable. The key factor of photochemical pollution in Pearl River Delta was the concentration of 20 ~ 40 渭 g/m~3 NO_x, which was higher than the temperature of 27 擄C. The results show that the formation of O _ (3) is mainly controlled by VOCs in October, and the potential of O _ (3) formation of olefins is 69%, while the contribution of alkanes and aromatic hydrocarbons is 15 ~ (16) U ~ (-1), respectively.
【作者單位】： 中山大學(xué)大氣科學(xué)學(xué)院;暨南大學(xué)大氣環(huán)境安全與污染控制研究所;暨南大學(xué)廣東省大氣污染在線源解析系統(tǒng)工程技術(shù)研究中心;中國(guó)氣象局廣州熱帶海洋氣象研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(41630422,41475004) 國(guó)家重點(diǎn)研發(fā)計(jì)劃課題(2016YFC0203305) 中國(guó)氣象局氣候變化專項(xiàng)(CCSF201531)
【分類號(hào)】：X515

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