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1、中国环境科学2013,33(2)：201~208ChinaEnvironmentalScience南京一次典型雾霾天气气溶胶光学特性*王静,牛生杰,许丹,于兴娜(南京信息工程大学大气物理学院,江苏省大气环境监测与污染控制高技术重点实验室,江苏南京210044)摘要：利用太阳光度计测得的直射太阳辐射和天空扫描数据,对南京北郊2010年冬季一次雾霾天气过程中气溶胶的光学特性进行了反演研究.研究表明,雾霾影响期间气溶胶光学厚度(AOD)明显增加,在1020,870,675,440nm四个波段上,雾霾前AOD为0.16~0.43,雾霾影响期间为0.3
2、1~0.84,雾霾后为0.19~0.48;本次雾霾天气的局地气溶胶散射能力增强,单次散射反照率(SSA)由发生前的0.8~0.86增大到发生时的0.89~0.91,而复折射指数的虚部降低,气溶胶的吸收能力明显减弱;雾霾过程伴随了大尺度气溶胶的导入,同时也有人为排放的贡献.其中雾霾影响期间粗粒子模态的体积浓度是发生前的2.5倍,细粒子浓度也比发生前增长了90%.关键词：太阳光度计；雾霾；气溶胶光学特性中图分类号：X511,TP79/P407文献标识码：A文章编号：1000-6923(2013)02-0201-08*Aerosolopticalp
3、ropertiesduringthetypicalhaze/fogeventinNanjing.WANGJing,NIUSheng-jie,XUDan,YUXing-na(JiangsuKeyLaboratoryofAtmosphericEnvironmentMonitoringandPollutionControl,SchoolofAtemosphericPhysics,NanjingUniversityofInformationScienceandTechnology,Nanjing210044,China).ChinaEnvironme
4、ntalScience,2013,33(2)：201~208Abstract：Theaerosolopticalpropertiesduringhaze/fogeventwereanalyzedinthenorthsuburbofNanjinginthewinterof2010byusingdirectsolarirradianceandskyradianceofCE318sun-photometer.Undertheinfluenceofhaze/fog,theaerosolopticaldepth(AOD)showedahigherval
5、ue.ThevaluesofAODat440,675,870and1020nmvariedfrom0.16to0.43beforethehazeandfogepisodes,increasedto0.31~0.84duringthehaze/foginfluencingperiodsandreducedto0.19~0.48afterthehaze/fogprocess.Thehighersinglescatteringalbedo(SSA)occurredinhaze/foginfluencingperiodswithvalueof0.89
6、~0.91.Theimaginarypartofcomplexrefractiveindexdecreasedafterthefog/hazedays.Theseresultssuggeststhattheenhancementofscatteringabilityandthedecreaseofabsorptionabilityoflocalaerosols.Duringthehaze/fogepisodes,theaerosolsizedistributioncomefromtheadditionofcoarseaerosolpartic
7、lesandthecontributionoftheanthropogenicfineparticles.Thevolumeconcentrationofcoarsemodeincreasedby2.5times,withthelowervalueof32320.033μm/μmbeforetheoutbreakofthefog/hazeprocessand0.082μm/μmduringthefog/hazeinfluencingperiods.Thevolumeconcentrationoffinemodealsoincreasedby9
8、0%comparedtothebeforetheevents.Keywords：sunphotometer；fog/haze；aerosolopticalprope
