CAJ | 학술논문

利用2002-2007年杭州市区空气污染物监测资料,根据杭州周边城市的每日环境空气质量,结合不同污染类型和气象资料,分析市区空气污染物变化特征及与气象条件的关系.结果表明,市区环境空气质量中污染天数出现频率逐年减少,空气质量正在好转,主要是首要污染物PM_(10)的浓度呈现逐年降低的趋势.在三种污染类型中大范围连续污染类型中的较重污染出现天数比其他两种污染类型多一半,大范围连续污染类型时PM_(10)浓度是最高的,个别污染类型时最低,PM_(10)浓度分别为0.256 mg·m~(-3)和0.177 mg·m~(-3).不同类型与不同天气形势的关系比较密切.杭州市区污染出现频率存在明显的季节变化,冬季最高,夏季最低,污染频率分别为25.6%和3.6%.不同污染类型中个别污染类型出现最多,局地连续污染类型出现最少,出现频率分别为40.7%和29.9%.不同季节不同污染类型的出现频率相差较大,局地连续污染冬季出现频率较高,个别污染在春季出现较多,大范围连续污染在秋季出现较多.夏季的空气质量最好,只有少数的个别污染出现.在不同级别污染中,Ⅲ1级(轻微污染)主要是个别污染类型,Ⅲ2级(轻度污染)和Ⅳ1级(中度污染)污染主要是大范围连续污染类型.而Ⅳ2级(中度重污染)和Ⅴ级(重度污染)污染出现时主要是受到沙尘暴影响或春节烟花爆竹燃放影响的个别污染类型.
이용2002-2007년항주시구공기오염물감측자료,근거항주주변성시적매일배경공기질량,결합불동오염류형화기상자료,분석시구공기오염물변화특정급여기상조건적관계.결과표명,시구배경공기질량중오염천수출현빈솔축년감소,공기질량정재호전,주요시수요오염물PM_(10)적농도정현축년강저적추세.재삼충오염류형중대범위련속오염류형중적교중오염출현천수비기타량충오염류형다일반,대범위련속오염류형시PM_(10)농도시최고적,개별오염류형시최저,PM_(10)농도분별위0.256 mg·m~(-3)화0.177 mg·m~(-3).불동류형여불동천기형세적관계비교밀절.항주시구오염출현빈솔존재명현적계절변화,동계최고,하계최저,오염빈솔분별위25.6%화3.6%.불동오염류형중개별오염류형출현최다,국지련속오염류형출현최소,출현빈솔분별위40.7%화29.9%.불동계절불동오염류형적출현빈솔상차교대,국지련속오염동계출현빈솔교고,개별오염재춘계출현교다,대범위련속오염재추계출현교다.하계적공기질량최호,지유소수적개별오염출현.재불동급별오염중,Ⅲ1급(경미오염)주요시개별오염류형,Ⅲ2급(경도오염)화Ⅳ1급(중도오염)오염주요시대범위련속오염류형.이Ⅳ2급(중도중오염)화Ⅴ급(중도오염)오염출현시주요시수도사진폭영향혹춘절연화폭죽연방영향적개별오염류형.
Based on the monitoring data of air pollutants from 2002 to 2007 over Hangzhou,according to ambient air quality every day in surrounding cities of Hangzhou,combined with different types of pollution and meteorological data,the characteristics of air pollutants and its relationship with weather conditions are analyzed.The results show that the frequency of pollution days in air quality is decreased year by year,and the air quality has been improved step by step,because the concentrations of PM_(10) that is the primary pollutant are decreased by degrees.The day of heavier level pollution in large-scale continual pollution is half more than that of other two types of pollution,and the highest concentration of PM_(10) appears in largescale continual pollution,and lowest in the individual pollution,there are 0.253 mg·m~(-3) and 0.177 mg·m~(-3),respectively.The different types of pollution are affected by various weather situations,their pollution level is also changed.The rates of different pollution types have an obvious seasonal variation,which is highest in winter,lowest in summer,there are 25.6% and 3.6%,respectively.Among the differenttypes of pollution,the rates of individual pollution and local continual pollution are 40.7% and 29.9%,respectively.The rates of different pollution types in four seasons are very obvious,showing a higher rate of local pollution type in winter,that of individual pollution in spring ,and that of the large-scale continuous pollution in autumn.The air quality in summer,that appears to be few of local pollution days,is the best in four seasons.The levels of different pollution are different,presenting the grades of Ⅲ1(level of slight pollution)is mainly the type of local pollution,the grades of Ⅲ2(lightly pollution)and IV1(moderat pollution)are mainly the large-scale continual pollution type,the grades of Ⅳ2(moderat heavier pollution level)and Ⅴ(heavy pollution level).re mostly the individual pollution type that affected by the duststorm or firework in the Spring Festival.