本文選題：伴隨方法 + 污染個(gè)例�。� 參考：《中國環(huán)境科學(xué)》2017年04期

【摘要】：本研究利用GRAPES-CUACE氣溶膠伴隨模式,對(duì)2015年11月27日~12月2日北京市一次高濃度PM_(2.5)污染過程進(jìn)行了敏感性分析,顯示了伴隨模式在追蹤重點(diǎn)排放源區(qū)及關(guān)注敏感排放時(shí)段等方面的優(yōu)越性.研究結(jié)果表明:本次污染事件所關(guān)注的北京市PM_(2.5)峰值濃度是北京市本地排放源和周邊省市排放源共同作用的結(jié)果.從累積敏感系數(shù)來看.目標(biāo)時(shí)刻前23h內(nèi),本地源貢獻(xiàn)占主導(dǎo),PM_(2.5)峰值濃度對(duì)本地排放源響應(yīng)迅速,目標(biāo)時(shí)刻前5h,本地源對(duì)峰值濃度的貢獻(xiàn)達(dá)到最大,逐時(shí)敏感系數(shù)峰值為9.4μg/m~3.周邊源貢獻(xiàn)表現(xiàn)為周期性波動(dòng),逐時(shí)敏感系數(shù)在目標(biāo)時(shí)刻前9,29,43h,出現(xiàn)3次峰值,分別為6.66,6.24,1.74μg/m~3,伴隨著偏南風(fēng),周邊源在目標(biāo)時(shí)刻前1~57h內(nèi)持續(xù)不斷地向北京市輸送污染物.不同距離的周邊源對(duì)目標(biāo)時(shí)刻PM_(2.5)峰值濃度的影響時(shí)段和程度不一樣,目標(biāo)時(shí)刻前72h內(nèi),北京、天津、河北及山西排放源對(duì)目標(biāo)時(shí)刻PM_(2.5)峰值濃度的累積貢獻(xiàn)比例分別為31%、9%、56%及4%;從逐時(shí)敏感系數(shù)來看,天津源貢獻(xiàn)的主要時(shí)段為目標(biāo)時(shí)刻前1~33h,逐時(shí)敏感系數(shù)峰值出現(xiàn)在目標(biāo)時(shí)刻前9h,為2.10μg/m~3,山西源貢獻(xiàn)的主要時(shí)段為目標(biāo)時(shí)刻前17~33h,逐時(shí)敏感系數(shù)峰值出現(xiàn)在目標(biāo)時(shí)刻前27h,為0.71μg/m~3,河北源貢獻(xiàn)的主要時(shí)段為目標(biāo)時(shí)刻前1~57h,逐時(shí)敏感系數(shù)呈現(xiàn)周期性波動(dòng),出現(xiàn)3次峰值,分別為4.55,5.31,1.59μg/m~3.
[Abstract]:Using GRAPES-CUACE aerosol adjoint model, the sensitivity of a high concentration PM2.5 pollution process in Beijing from November 27 to December 2, 2015 was analyzed. The advantages of the accompanying model in tracking key emission sources and paying attention to sensitive emission periods are demonstrated. The results show that the peak concentration of PM2.5 in Beijing concerned by this pollution event is the result of the interaction between the local emission sources in Beijing and the emission sources in the surrounding provinces and cities. Judging from the cumulative sensitivity coefficient. Within 23 hours before the target time, the contribution of local sources to the peak concentration of PM2.5 was rapid to the local emission sources, and the contribution of local sources to the peak concentration reached the maximum at 5 hours before the target time, and the peak value of hourly sensitivity was 9.4 渭 g / m ~ (-1). The contribution of peripheral sources fluctuated periodically, and the time-sensitive coefficient was 92943hs before the target time, with three peaks of 6.66 ~ 6.241.74 渭 g / m ~ (-3), which accompanied by the southerly wind, and the peripheral sources continuously transported pollutants to Beijing within 57 hours before the target time. The influence of peripheral sources at different distances on the peak concentration of PM2.5 at the target time is different. Within 72 hours before the target time, Beijing, Tianjin, The cumulative contribution of Hebei and Shanxi emission sources to the peak concentration of PM2.5 at the target time is 31% and 4%, respectively. The main period of Tianjin source contribution is 1 ~ 33h before the target time, the peak value of time-by-hour sensitivity coefficient appears at 9 hours before the target moment, which is 2.10 渭 g / m ~ (-3). The main period of Shanxi source's contribution is 17 ~ 33h before the target time, and the peak value of time-by-hour sensitivity coefficient appears 27 hours before the target time. It is 0.71 渭 g / mm3. The main period of Hebei source contribution is 57 h before the target time, and the hourly sensitivity coefficient fluctuates periodically. There were three peaks of 4.55 ~ 5.31 渭 g / m ~ (-1) and 1.59 渭 g / m ~ (-1) respectively.
【作者單位】： 中國氣象科學(xué)研究院大氣成分研究所;南京信息工程大學(xué)中國氣象局氣溶膠-云-降水重點(diǎn)開放實(shí)驗(yàn)室;中國氣象局北京城市氣象研究所;中國氣象局京津冀環(huán)境氣象預(yù)報(bào)預(yù)警中心;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(41575151) 國家重點(diǎn)研發(fā)計(jì)劃“全球變化及應(yīng)對(duì)”重點(diǎn)專項(xiàng)“黑碳的農(nóng)業(yè)與生活源排放對(duì)東亞氣候 空氣質(zhì)量的影響及其氣候-健康效益評(píng)估”(2016YFA0602000)
【分類號(hào)】：X513

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本文編號(hào)：2097011