發(fā)布時間：2018-05-25 06:22

  本文選題：氣溶膠 + 化學(xué)組分��； 參考：《氣象學(xué)報》2016年06期

【摘要】：利用2014年7月在黃山光明頂觀測的氣溶膠吸濕性參數(shù)(κ)和氣溶膠離子化學(xué)組分、有機碳(OC,organic carbon)數(shù)據(jù),對多尺度氣溶膠吸濕性參數(shù)進行分析,并在此基礎(chǔ)上建立了多尺度κ的參數(shù)化方案。研究結(jié)果表明,影響黃山夏季氣溶膠來源的主要氣團包括西南氣團、北方氣團以及東南氣團。黃山夏季κ的變化范圍為0.2—0.48,且隨粒徑增大成先增大后減小的分布特征;氣溶膠粒徑在0.15—1.1μm的強吸濕段,κ0.3,而在粒徑小于0.15μm和粒徑大于1.1μm弱吸濕段,κ0.3。不同氣團背景下κ分布不同,氣溶膠粒子在小于1.1μm的粒徑段,當(dāng)受西南氣團影響時,κ值最大,而受東南氣團影響時,κ值最小;在氣溶膠粒徑大于1.1μm時,κ在兩個氣團背景下呈現(xiàn)與氣溶膠粒徑小于1.1μm時相反的分布特征。影響粒徑小于1.1μm氣溶膠吸濕能力的主要水溶性化學(xué)組分為NH_4~+、SO_4~(2-)、水溶性有機碳(WSOC,water soluble organic carbon),而影響大于1.12μm粒徑范圍氣溶膠吸濕能力的主要水溶性化學(xué)組分為NH_4~+、SO_4~-、NO_3~-、WSOC和Ca~(2+)。由氣溶膠多尺度離子化學(xué)組分和WSOC構(gòu)建的氣溶膠κ的參數(shù)化方案,在小于1.1μm和大于1.1μm的粒徑范圍內(nèi)的表達式分別為κ_(reg)=0.12+0.45f_(NH_4~+)+0.63f_(SO_4~(2-))+0.18 f_(WSOC)和κ_(reg)=0.01+0.78f_(NH_4~+)+0.76f_(NO_3)+0.8f_(SO_4~(2-))-0.28f_(Ca~(2+))+0.14f_(WSOC)(f為對應(yīng)組分的質(zhì)量份數(shù))。兩個參數(shù)化方案均能較好地預(yù)報κ,預(yù)報值κreg與κ的計算值間存在較好的相關(guān)關(guān)系,相關(guān)系數(shù)通過了置信度99%的顯著性檢驗,且預(yù)報誤差在30%范圍內(nèi)。
[Abstract]:Based on the aerosol hygroscopicity parameters (魏) and aerosol ion chemical components, organic carbon (OC), observed in July 2014 at the top of the Huangshan Mountains, the multi-scale aerosol hygroscopicity parameters were analyzed. On this basis, the parameterization scheme of multi-scale 魏 is established. The results show that the main aerosol sources in the summer of Huangshan Mountain include the southwest air mass, the northern air mass and the southeast air mass. The variation range of 魏 in Huangshan summer is 0.2-0.48, and it increases first and then decreases with the increase of particle size, and the aerosol particle size increases at 0.15-1.1 渭 m, 魏 0.3, and 魏 0.3 in the phase of particle size less than 0.15 渭 m and the particle size larger than 1.1 渭 m. The distribution of 魏 is different in different air mass background. When the size of aerosol particles is less than 1.1 渭 m, the 魏 value of aerosol particles is the largest when affected by southwest air mass, and the smallest when affected by southeast air mass. When the size of aerosol is larger than 1.1 渭 m, the distribution of 魏 is opposite to that of aerosol smaller than 1.1 渭 m in two aerosols. The main water-soluble chemical components which affect the moisture absorption ability of aerosol with diameter less than 1.1 渭 m are NH _ 4 ~ S _ 4, W _ SOC _ 2O soluble organic carbon, while the main water-soluble chemical components which affect the moisture absorption ability of aerosol larger than 1.12 渭 m are NH _ 4 ~ T _ 4, O _ 4, O _ 3-WSOC and Ca~(2. 鐢辨皵婧惰兌澶氬昂搴︾瀛愬寲瀛︾粍鍒嗗拰W(xué)SOC鏋勫緩鐨勬皵婧惰兌魏鐨勫弬鏁板寲鏂規(guī),鍦ㄥ皬浜，

本文編號：1932436