南京郊區(qū)大氣氮化物濃度和氮沉降通量的研究

doi:10.3969/2012jms.00**

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南京郊區(qū)大氣氮化物濃度和氮沉降通量的研究
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                        10.3969/2012jms.00**
                    
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基金項(xiàng)目:國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(973計(jì)劃)，國(guó)家自然科學(xué)基金?

Study on atmospheric nitrogen oxidant and deposition flux in suburban of Nanjing

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為研究南京郊區(qū)的大氣氮化物污染狀況,進(jìn)而估算其大氣氮沉降通量,2005年6月-2006年5月在南京大學(xué)浦口校區(qū)氣象園進(jìn)行了大氣、氣溶膠和雨水樣本的收集,同步進(jìn)行近地面氣象觀測(cè).在實(shí)驗(yàn)室分析大氣氮化物NOx、NH3和有機(jī)氮濃度、總懸浮顆粒物(TSP)中硝酸鹽、亞硝酸鹽、銨鹽和有機(jī)氮的質(zhì)量濃度、雨水中NO-3、NO-2、NH+4離子和有機(jī)氮的質(zhì)量濃度,利用氣象資料和大葉阻力相似模型計(jì)算大氣氮化物的干沉降速度,進(jìn)而定量估算大氣氮沉降通量.研究結(jié)果表明:南京郊區(qū)大氣中有機(jī)氮濃度水平較高,無(wú)機(jī)氮(氨態(tài)氮和硝態(tài)氮)濃度水平較低.大氣氮沉降量較大,且濕沉降和有機(jī)沉降貢獻(xiàn)率占主導(dǎo)地位,這取決于本地區(qū)的下墊面和污染狀況,同時(shí)也與氣象條件有密切關(guān)系.

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During the period of June, 2005—May, 2006 (a year total), atmosphere swatch, aerosol swatch and rainwater swatch were collected in suburban of Nanjing. The measurement was conducted at the observatory of Pukou schoolhouse of Nanjing University. Surface layer weather conditions were observed synchronously. Nitride (NOX+NH3) in the atmosphere, nitrate, nitrite and ammonium in TSP (Total Suspended Particles), the NO-3 and NH+4 in rainwater and ON (organic nitrogen) were analyzed in the laboratory. Dry depositional velocity of atmospheric nitric contamination was counted using both measurement and modeling, then atmospheric nitrogen depositional flux could be estimated. The results show that the concentration of ON is relatively high whereas that of IN (inorganic nitrogen) is relatively low, and also the atmospheric nitrogen deposition flux in suburban of Nanjing is quite remarkable because wet deposition and organic deposition are relatively large, which are related to the landuse type and air pollution situation as well as the weather condition.

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鄧君俊,王體健,李樹,謝旻,樊建凌.南京郊區(qū)大氣氮化物濃度和氮沉降通量的研究.氣象科學(xué),2009,(1):25-30 Deng Junjun, Wang Tijian, Li Shu, Xie Min, Fan Jianling. Study on atmospheric nitrogen oxidant and deposition flux in suburban of Nanjing. Journal of the Meteorological Sciences,2009,(1):25-30

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