本文關(guān)鍵詞： 太湖 大氣顆粒物 氣象條件　出處：《氣象科學(xué)》2016年06期 　論文類型：期刊論文

【摘要】：利用冬季連續(xù)2 d在兩種氣象條件下分別環(huán)繞太湖對(duì)湖泊近無(wú)錫區(qū)域、湖心區(qū)域、近西山島區(qū)域和近蘇州區(qū)域近湖層的PM0.5、PM2.5和PM10進(jìn)行質(zhì)量濃度觀測(cè),并通過(guò)分析同期相應(yīng)氣象資料(包括高空和地面風(fēng)場(chǎng)、流場(chǎng)以及湖面站點(diǎn)的水平垂直風(fēng)向風(fēng)速等氣象數(shù)據(jù)),探討湖泊區(qū)域內(nèi)外顆粒物濃度變化的時(shí)空特征以及受氣象條件變化的影響。研究表明:第1天當(dāng)天氣為晴轉(zhuǎn)陰且無(wú)霧時(shí),由于湖面本身缺乏密集強(qiáng)排放源,以及因湖面大氣上升運(yùn)動(dòng)較強(qiáng)使顆粒物容易被擴(kuò)散稀釋,且受偏東轉(zhuǎn)東南氣流所帶來(lái)的氣團(tuán)較干凈影響,湖面湖心區(qū)域和離島區(qū)域顆粒物濃度明顯低于上游城市;而在第2天當(dāng)天氣為霧時(shí)情況則相反,由于湖面大氣較弱的上升運(yùn)動(dòng)使得大氣顆粒物不容易被擴(kuò)散稀釋,且湖泊強(qiáng)大的水汽源影響有助于氣溶膠和顆粒物的生成進(jìn)而使得湖面顆粒物濃度大于周圍城市。此外還發(fā)現(xiàn)在兩種天氣下,顆粒物濃度都存在無(wú)錫區(qū)域最高,湖心區(qū)域次之,蘇州區(qū)域較低的特征。并且,在霧天不同粒徑顆粒物間變化的相關(guān)系數(shù)更高。
[Abstract]:The PM0.5 of the lake near Wuxi, the center of the lake, the area near Xishan Island and the area near Suzhou were used to surround the lake in winter for two consecutive days under two meteorological conditions. PM2.5 and PM10 made mass concentration observation and analyzed the corresponding meteorological data (including upper and surface wind field, flow field and horizontal vertical wind wind speed and other meteorological data) during the same period. The temporal and spatial characteristics of the change of particulate matter concentration in and out of the lake area and the influence of meteorological conditions are discussed. The results show that when the weather turns cloudy and fog free on the first day, there is a lack of dense and strong emission sources on the lake surface itself. And because of the strong upward movement of the lake surface, the particulate matter is easy to diffuse and dilute, and is affected by the relatively clean air mass caused by the easterly and southeasterly air flow. The concentration of particulate matter in the center of lake and outlying islands was significantly lower than that in upstream cities. On the second day, when the weather is foggy, the situation is opposite, because of the weak rising motion of the lake surface atmosphere, the atmospheric particulate matter is not easy to be diffused and diluted. And the strong water vapor source influence the formation of aerosol and particulate matter, which makes the concentration of particulate matter higher than that of the surrounding city. In addition, it is found that the concentration of particulate matter is the highest in Wuxi region under both weather conditions. In the middle of the lake, the characteristics of Suzhou region are lower, and the correlation coefficient between different particle sizes in foggy days is higher.
【作者單位】： 南京信息工程大學(xué)大氣環(huán)境中心;南京信息工程大學(xué)環(huán)境科學(xué)與工程學(xué)院;廣西柳州市氣象局;
【基金】：江蘇省青年科學(xué)基金項(xiàng)目(BK20150895) 南京信息工程大學(xué)人才啟動(dòng)基金項(xiàng)目
【分類號(hào)】：X513
【正文快照】： 3廣西柳州市氣象局,廣西柳州545001)vapor source of lake and stable weather condition facilitates the genesis and accumulation of aerosol andparticles,which makes the different condition compared with the day without fog.In addition,the featureof spatial va

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