中国环境科学
中國環境科學
중국배경과학
CHINA ENVIRONMENTAL SCIENCE
2014年
4期
844-851
,共8页
周勤迁%潘月鹏%王剑%刘子锐%吉东生%陈卫卫%王跃思
週勤遷%潘月鵬%王劍%劉子銳%吉東生%陳衛衛%王躍思
주근천%반월붕%왕검%류자예%길동생%진위위%왕약사
气溶胶%农业源%SO2%NOx%O3%PM2.5%后向轨迹模型
氣溶膠%農業源%SO2%NOx%O3%PM2.5%後嚮軌跡模型
기용효%농업원%SO2%NOx%O3%PM2.5%후향궤적모형
aerosol%agriculture source%SO2%NOx%O3%PM2.5%backward trajectory model
2011~2012年冬春期间(11月到翌年4月),通过设置在海伦农田生态系统国家野外科学观测研究站内的在线监测仪器获取了 PM2.5和气态污染物(NOx、O3和SO2)质量浓度的时间变化,同时结合地面气象资料和HYSPLIT后向气团轨迹模型分析了该地大气污染物的污染水平、可能来源及传输过程.结果表明：观测期间 PM2.5、NOx和 SO2的24h 均值(范围)分别为(54.7±45.7)(8.0~217.8),(23.0±11.5)(4.5~59.6),(10.0±10.3)(0.3~56.0)μg/m3, O3的日最大8h平均值(范围)为(62.4±18.7)(24.1~173.5)μg/m3,其中除O3在4月份超过国家一级标准8d外,其它气态污染物均未超过国家一级标准；PM2.5超过国家二级标准的天数为40d,占整个观测期间的22.5%.PM2.5和 SO2各月质量浓度变化较大,最高值出现在12月份,是冬季采暖的高峰期.NOx、PM2.5和 SO2日变化呈双峰型,峰值出现在07：00和17：00左右；O3为单峰型,峰值出现13：00~15：00.通过对海伦地区72h内HYSPLIT后向气团轨迹模拟结果和该站点的气象数据进行分析,表明该农业区大气污染受本地源和区域输送共同影响,偏南气流易造成污染物积累,而偏北气流有利于污染物扩散.
2011~2012年鼕春期間(11月到翌年4月),通過設置在海倫農田生態繫統國傢野外科學觀測研究站內的在線鑑測儀器穫取瞭 PM2.5和氣態汙染物(NOx、O3和SO2)質量濃度的時間變化,同時結閤地麵氣象資料和HYSPLIT後嚮氣糰軌跡模型分析瞭該地大氣汙染物的汙染水平、可能來源及傳輸過程.結果錶明：觀測期間 PM2.5、NOx和 SO2的24h 均值(範圍)分彆為(54.7±45.7)(8.0~217.8),(23.0±11.5)(4.5~59.6),(10.0±10.3)(0.3~56.0)μg/m3, O3的日最大8h平均值(範圍)為(62.4±18.7)(24.1~173.5)μg/m3,其中除O3在4月份超過國傢一級標準8d外,其它氣態汙染物均未超過國傢一級標準；PM2.5超過國傢二級標準的天數為40d,佔整箇觀測期間的22.5%.PM2.5和 SO2各月質量濃度變化較大,最高值齣現在12月份,是鼕季採暖的高峰期.NOx、PM2.5和 SO2日變化呈雙峰型,峰值齣現在07：00和17：00左右；O3為單峰型,峰值齣現13：00~15：00.通過對海倫地區72h內HYSPLIT後嚮氣糰軌跡模擬結果和該站點的氣象數據進行分析,錶明該農業區大氣汙染受本地源和區域輸送共同影響,偏南氣流易造成汙染物積纍,而偏北氣流有利于汙染物擴散.
2011~2012년동춘기간(11월도익년4월),통과설치재해륜농전생태계통국가야외과학관측연구참내적재선감측의기획취료 PM2.5화기태오염물(NOx、O3화SO2)질량농도적시간변화,동시결합지면기상자료화HYSPLIT후향기단궤적모형분석료해지대기오염물적오염수평、가능래원급전수과정.결과표명：관측기간 PM2.5、NOx화 SO2적24h 균치(범위)분별위(54.7±45.7)(8.0~217.8),(23.0±11.5)(4.5~59.6),(10.0±10.3)(0.3~56.0)μg/m3, O3적일최대8h평균치(범위)위(62.4±18.7)(24.1~173.5)μg/m3,기중제O3재4월빈초과국가일급표준8d외,기타기태오염물균미초과국가일급표준；PM2.5초과국가이급표준적천수위40d,점정개관측기간적22.5%.PM2.5화 SO2각월질량농도변화교대,최고치출현재12월빈,시동계채난적고봉기.NOx、PM2.5화 SO2일변화정쌍봉형,봉치출현재07：00화17：00좌우；O3위단봉형,봉치출현13：00~15：00.통과대해륜지구72h내HYSPLIT후향기단궤적모의결과화해참점적기상수거진행분석,표명해농업구대기오염수본지원화구역수송공동영향,편남기류역조성오염물적루,이편북기류유리우오염물확산.
To know the pollution levels, possible emission sources and transport process in agricultural region, on-line measurements of main air pollutants (i.e., PM2.5, NOx, O3 and SO2) were conducted from November 1 2011 to April 30 2012 at National Observation Station of Hailun Agro-ecology System, Heilongjiang Province and further analysis were taken with surface meteorology data and backward trajectories model (i.e., HYSPLIT). The average of daily concentrations of PM2.5, NOx, and SO2 during the measurement period were (54.7±45.7) (8.0~217.8)、(23.0±11.5) (4.5~59.6) and (10.0±10.3) (0.3~56.0) μg/m3, respectively. The maximum average 8hours of O3 concentration was (62.4±18.7) (24.1~173.5) μg/m3. The gaseous pollutant levels were all below the National Ambient Air Quality Standard (NAAQS) except O3. Daily average of PM2.5 concentrations exceeded more than 40days as compared to NAAQS, which accounted for approximately one-fourth of measurement days. The concentrations of PM2.5 and SO2 were significantly higher in December than other months due to the greatest needs of winter heating. The diurnal variations of NOx, PM2.5 and SO2 were similar with two peaks occurring at 07:00and 17:00, while O3has one peak between 13:00to 15:00local time. The analysis of meteorology data and HYSPLIT suggested that the atmospheric pollution in winter is closely linked to local source emission, regional transport as well as the local meteorological conditions in Hailun city. South flows easily formed air pollution, while north wind favored the removal of pollutants by diffusion.
