發(fā)布時間：2018-07-10 04:46

  本文選題：大氣 + 重金屬　； 參考：《海洋通報》2016年06期

【摘要】：利用2013-2015年珠江口海域代表春、夏、秋、冬4個季節(jié)的氣溶膠質(zhì)量濃度資料及同期的氣象觀測數(shù)據(jù),分析得出大氣中重金屬(Cu、Pb、Zn)質(zhì)量濃度具有秋季最高,冬季次之,春、夏季較低的季節(jié)變化特征,這一特征與氣象因子及污染來源關(guān)系密切。除春季外,夏、秋、冬季,大氣中Cu、Pb、Zn之間具有良好的顯著相關(guān)性,說明大氣中賦存Cu、Pb、Zn的顆粒物一部分來源相同。春、夏季,當(dāng)主導(dǎo)風(fēng)向?yàn)闁|南向時,氣團(tuán)較清潔,大氣污染物濃度低;秋、冬季,當(dāng)主導(dǎo)風(fēng)向?yàn)槠珫|向及北風(fēng)向時,污染物由內(nèi)陸源及沿海源輸送,大氣污染物濃度高。氣象條件對大氣中重金屬含量具有重要的影響,且其相關(guān)性隨季節(jié)變化明顯。通過SPSS 19.0軟件對大氣中Cu、Pb、Zn的質(zhì)量濃度與近地面風(fēng)速、氣溫、氣壓、相對濕度等做曲線回歸分析,嘗試找出各污染物濃度變化與氣象因子的定量關(guān)系。結(jié)果表明,春、夏季,當(dāng)氣溫27℃時,Cu、Pb、Zn的質(zhì)量濃度與氣溫呈顯著正相關(guān);夏季,Cu、Pb、Zn的質(zhì)量濃度與氣壓、相對濕度(90%)呈顯著負(fù)相關(guān);秋季,Cu、Pb、Zn的質(zhì)量濃度與風(fēng)速和相對濕度(65%)具有顯著負(fù)相關(guān);冬季,當(dāng)氣壓在1005.0~1015.0 h Pa范圍內(nèi),Cu、Pb、Zn的質(zhì)量濃度與氣壓呈顯著正相關(guān)。
[Abstract]:Based on the aerosol mass concentration data of spring, summer, autumn and winter in the Pearl River Estuary from 2013 to 2015 and meteorological observation data of the same period, it is concluded that the mass concentration of heavy metals in the atmosphere is highest in autumn, followed by spring in winter. The lower seasonal variation in summer is closely related to meteorological factors and pollution sources. Except in spring, summer, autumn and winter, there was a good correlation between Cu ~ (2 +) Pb ~ (2 +) Zn in the atmosphere, indicating that some of the particulate matter containing Cu ~ (2 +) Pb ~ (2 +) Zn in the atmosphere were from the same source. In spring and summer, when the dominant wind direction is southeastward, the air mass is cleaner and the concentration of atmospheric pollutants is low. In autumn and winter, when the dominant wind direction is eastward and northerly, the pollutants are transported from inland and coastal sources, and the concentration of atmospheric pollutants is high. The meteorological conditions have an important influence on the heavy metal content in the atmosphere, and the correlation is obvious with the seasons. By using SPSS 19.0 software, the relationship between the mass concentration of Cu PbN Zn in the atmosphere and the near surface wind speed, air temperature, air pressure, relative humidity and so on was analyzed, and the quantitative relationship between the concentration of each pollutant and meteorological factors was found out. The results showed that there was a significant positive correlation between the mass concentration of PbZn and the temperature at 27 鈩，

本文編號：2112110