西安市空气污染物浓度统计特征与其气象影响分析

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1、3.Fourcommonlyusedstatisticaldistributionmodelswereadoptedtoresearchtheoptimaldistributionofairpollutantconcentrationsindifferentseasonsandtypicalairqualityconditions,alsothemainparametersofthebestdistributions.Andusingthreegoodness-of-fitteststodetermine

2、theappropriatestatisticaldistributionmodelofairpollutantconcentrations,includingKS,ADandChi-squaredtest,respectively.4.TheinfluenceofmeteorologicalelementsontheairpollutantsconcentrationinXi'anwasstudiedusinglinearcorrelationanalysismethod.Theresultsindic

3、atedthatwindspeed,temperatureandmixedlayerdepthallshownegativecorrelationwithpollutionconcentrations,whileairpressureandatmosphericstabilityarepositivelycorrelatedwiththeconcentrationsofpollutants.5.Thepaperanalyzedanddiscussedthemeteorologicalconditionso

4、nsituationsofthe“best”and“worst”airquality.Itisconcludedthatairqualityisbetterwhenthereisheavyandcontinuousprecipitation.Whileseriousairpollutionwillappeareasilywhenthereisnoprecipitationwiththelowermixedlayerandhigheroccurenceofcalmwind.Besides,windspeed

5、istoolarge(morethanacertainthreshold)canalsocauseparticulatepollution.Keywords:airpollutantconcentrations;statisticalcharacteristics;meteorologicalelements;Xi'anIII目录第一章绪论....................................................................................

6、........................................11.1研究背景......................................................................................................................11.2研究目的和意义..............................................................................

7、............................11.3国内外研究现状..........................................................................................................21.3.1空气污染物浓度统计特征的研究现状............................................................21.3.2空气污染物浓度与气象因素的关系.......

8、.........................................................51.4研究内容......................................................................................................................7第二章西安市环境概况.....................