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《北京秋季大气气溶胶光学厚度与Angstrom指数观测研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国环境科学2014,34(6):1380-1389ChinaEnvironmentalScience北京秋季大气气溶胶光学厚度与Angstr6m指数观测研究张勇,一,银燕2聿,刘蕴芳,赵凤生,任静(1.环境保护部华南环境科学研究所,广东广州510655;2.南京信息工程大学,中国气象局气溶胶与云降水重点开放实验室,江苏南京210044;3.北京师范大学全球变化与地球系统科学研究院,北京100875;4.渭南市环境保护局,陕西渭南714000)摘要:利用2010年10-11月CE318太阳光度计观测资料,得出了北京市秋季气溶胶光学厚
2、度(AOD=500nm),AngstrSm波长指数(d)和浑浊度(.结果显示,气溶胶AOD,Angstr6m指数,浑浊度平均值分别为O.5(土0.69)、0.95(士033)、O.24(士O.31),变异系数分别为139%、35%~n132%.非污染天,AOD变化较小,峰值出现在15:00,但大气中细粒子组分相对较高;污染天,AOD波动很大,没有明显的日变化,颗粒物以细粒子为主非污染天,当a<0.5,a与AOD呈反相关,a>1.0,两者呈现正相关;污染天,两者无明显关系,但当AOD>I.0,a随AOD的增大而变小.当Vm3、1m/s<<4m/s,n随AOD呈现相似的变化,风速不会成为局地气溶胶变化的影响因素;当>4m/s,AOD和d均出现小值,“与AOD呈负相关.风向也是影响n和AOD变化的重要因素,尤其ENE为主导风向时,d与AOD呈明显正相关温度的变化并未对n和AOD的变化造成很大影响.局地扬尘或沙尘气溶胶呈非亲水性,但当a>05,AOD随相对湿度(RH)的增大有一定程度的增大.关键词:北京;气溶胶光学厚度;Angstr6m波长指数;气象要素中图分类号:X513文献标识码:A文章编号:1000—6923(2014)06—1380—10Aobserv4、ationalstudyofaerosolopticaldepthandangstromwavelengthexponentoverBeijinginAutumn.ZHANGYong,Y1NYan2LIUYun.fang,ZHAOFeng.sheng。RENJing4(1.SouthChinaInstituteofEnvironmentalSciences,,,MinistryofEnvironmentalProtection,Guangzhou510655,China;2.KeyLaboratoryforAerosol—Cloud5、-PrecipitationofChinaMeteorologicalAdministration,NanjingUniversityofInformmionScienceandTechnology,Nanjing210044,China;3.CollegeofGlobalChangeandEarthSystem,BeijingNormalUniversity,Beijing100875,China:4.WeinanMunicipalEnvironmentalProtectionBureau,Weinan714000,China).6、ChinaEnvironmentalScience,2014,34(6):1380-1389Abstract:Theaerosolopticaldepth(AODz:5oomn),Angstr6mwavelengthexponent(d)andturbiditycoeficient∽arederivedfromsunphotometerCE318measurementsoverBeijingfromOctobertoDecember2010.Theresultsshowthat,themeanvaluesofAOD,Angstr6m7、wavelengthexponentandturbiditycoeficientare0.5+0.69,0.95~0.33,0.24~0.31withcoeficientsofvariation(CV)of139%,35%and132%,respectively.AODchangelittleinpolluteddayswithapeakat15:00,buttheconcentrationsoffineparticlesarerelativelyhigh.Duringpolluteddays,AODfluctuatewidelyw8、ithoutadistinctdiurnalvariation,andthefineparticlesarethemaincomponentsoftheairpollutants.Inaddition,duringthenon-pol
3、1m/s<<4m/s,n随AOD呈现相似的变化,风速不会成为局地气溶胶变化的影响因素;当>4m/s,AOD和d均出现小值,“与AOD呈负相关.风向也是影响n和AOD变化的重要因素,尤其ENE为主导风向时,d与AOD呈明显正相关温度的变化并未对n和AOD的变化造成很大影响.局地扬尘或沙尘气溶胶呈非亲水性,但当a>05,AOD随相对湿度(RH)的增大有一定程度的增大.关键词:北京;气溶胶光学厚度;Angstr6m波长指数;气象要素中图分类号:X513文献标识码:A文章编号:1000—6923(2014)06—1380—10Aobserv
4、ationalstudyofaerosolopticaldepthandangstromwavelengthexponentoverBeijinginAutumn.ZHANGYong,Y1NYan2LIUYun.fang,ZHAOFeng.sheng。RENJing4(1.SouthChinaInstituteofEnvironmentalSciences,,,MinistryofEnvironmentalProtection,Guangzhou510655,China;2.KeyLaboratoryforAerosol—Cloud
5、-PrecipitationofChinaMeteorologicalAdministration,NanjingUniversityofInformmionScienceandTechnology,Nanjing210044,China;3.CollegeofGlobalChangeandEarthSystem,BeijingNormalUniversity,Beijing100875,China:4.WeinanMunicipalEnvironmentalProtectionBureau,Weinan714000,China).
6、ChinaEnvironmentalScience,2014,34(6):1380-1389Abstract:Theaerosolopticaldepth(AODz:5oomn),Angstr6mwavelengthexponent(d)andturbiditycoeficient∽arederivedfromsunphotometerCE318measurementsoverBeijingfromOctobertoDecember2010.Theresultsshowthat,themeanvaluesofAOD,Angstr6m
7、wavelengthexponentandturbiditycoeficientare0.5+0.69,0.95~0.33,0.24~0.31withcoeficientsofvariation(CV)of139%,35%and132%,respectively.AODchangelittleinpolluteddayswithapeakat15:00,buttheconcentrationsoffineparticlesarerelativelyhigh.Duringpolluteddays,AODfluctuatewidelyw
8、ithoutadistinctdiurnalvariation,andthefineparticlesarethemaincomponentsoftheairpollutants.Inaddition,duringthenon-pol
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