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CO1,2,1*,1,2,1,2,1(11,100029;21,,100039):CO,.(FID)HP5890II(GC),10min,325m(39b9cN,116b4cE),CO,2004-01~2004-12.CO,1d2,07:00~08:0022:00~23:00,1318mg#m-3,1711mg#m-3.CO:,.CO,CO.CO.,CO,12(410?314)mg#m-3,5(117?017)mg#m-3.1a(216?119)mg#m-3,(315?216)mg#m-3,(212?112)mg#m-3.:CO;;;;:X511:A:0250-3301(2006)02-0200-07:2005-01-15;:2005-05-14:(KZCX1-SW-01);(40222202):(1976~),,.*MeasurementontheAtmosphericCOConcentrationinBeijingXUEMin1,2,WANGYue-si1,SUNYang1,2,HUBo1,2,WANGMing-xing1(11InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029,China;21GraduateSchooloftheChineseAcademyofSciences,Beijing100039,China)Abstract:Carbonmonoxideisconsideredasacriteriapollutantinurbanareas,andplaysanimportantroleinphotochemistryofregionalandurbanenvironments.ContinuousmeasurementofCOatthemeteorologicalobservationtowerinIAP-CAS(39b9cN,116b4cE)fromJanuarytoDecember2004wascarriedoutinBeijing,usingHP5890IIgaschromatography(GC)withflameionizationdetector(FID),atmeasurementfrequencyof10minutes.ThediurnalvariationsoftheatmosphericCOconcentrationattheurbanareainBeijingshowaveryclearcyclewithtwopeaks,oneappearsabout07:00~08:00inthemorningandtheotherisat22:00~23:00intheevening,withthemaximumof1318mg#m-3,1711mg#m-3,respectively1However,diurnalvariationsinfourseasonsarenotverysame.Thevariationrangeisbiggerinwinterandautumnseasonsthanthatinsummerandspringseasons.Theconcentrationinfallandwinterseasonsdroppedmorequicklythanthatinspringandsummerseasonsafter07:00~08:00.COconcentrationdiurnalvariationsarebelievedtobeduetothecombinationresultsofsurfaceemissionsourcesandmeteorologicalfactors.TheresultsindicatethatthereisanobviouslyseasonalcycleofCOconcentration,withthemaximuminDec(410?314)mg#m-3andminimuminMay(117?017)mg#m-3.TheaverageconcentrationofCOduringthewholeyearis(216?119)mg#m-3.TheaverageconcentrationofCOduringtheheatingperiodis(315?216)mg#m-3,and(212?112)mg#m-3duringtheperiodwithoutheating.Keywords:carbonmonoxide;flameionizationdetector;gaschromatography;diurnalvariation;seasonalvariationCO[1],10-6[2].CO,,,COEPA[3].,COOH[4,5],50%OH[6],;,NOx,COO3,.CONOxNMHCCH4O3[7].CO,OH,,.,COCH424%~37%,CO1,CH440%~50%,O312%[8].CO20%,OH7%,CH4,27220062ENVIRONMENTALSCIENCEVol.27,No.2Feb.,2006O3HCFC,[9].,CO[10,11].CO(,350~550Tg/a)(300~700Tg/a)(20~200Tg/a)(60~160Tg/a);CH4(700Tg/a)NMHC(560Tg/a)[12].COOH,CO2,;[13~16].,CO,OH.OH,CO.CO,CH4.,O3CO.,CO.CO,,2004-01CO.1111,325m(39b9cN,116b4cE)10m,325m,1km,200m,50m.,.2004-01~2004-12.10min1,,211mg/m3CO.,CO,10min1,CO.,,..112(FID)HP5890IIHP11142140L,140L,1,1.:20/h,1mL,1713Lg#m-3,2%,?3%,CO.2211CO2111112004.,,.198912CO[17].4CO07:00~08:001,,15:00~16:00,22:00~23:001.07:00~08:001318mg#m-3,,,22:00~23:001711mg#m-3,,CO,.21112CO.CO018016210116mg#m-3.,;,.,.,3,17:00CO,22:00~23:00.,,3.2012112mg#m-311,CO,CO.1COFig.1DiurnalvariationofCO21113CO,.,07-01~07-08(),11-11~11-21().2CO.2:,08:00,.,,,.,34.3(a):,,,;[3(b)],.,,,.11[4(a)],;[4(b)],.11,,,CO.CO(06-21~06-30),5.5,.[6(a)],;[6(b)],,.,415m/s,4m/s.CO,(,),.CO.,.1,2004(6~8):2004,.,,8.37~40e,611.(\35e),.212CO2121112004CO12,.CO,12,5(7).(3,4,5)(6,7,8)(9,10,11)(12,1,2)202272COFig.2VariationofCOconcentration3CO(07-01~07-08)Fig.3COconcentrationandwindspeedvariationbasedonwinddirection4CO(11-11~11-21)Fig.4COconcentrationandwindspeedvariationbasedonwinddirection(211?112)mg#m-3,(211?018)mg#m-3,(218?118)mg#m-3,(318?219)mg#m-3.(11-10~03-15):(315?216)mg#m-3,(03-16~11-10)(212?112)mg#m-3.1a(216?119)mg#m-3.CO,,20325COFig.5VariationofCOconcentration6CO(06-21~06-30)Fig.6COconcentrationandwindspeedvariationbasedonwinddirection.,,116.1985,CO2[18].,COCO.,,,,COOH,CO,.1996~1997Oki(36bN,133bE),Happo(36bN,137bE),Benoki(26bN,128bE)3CO[19]CO7,5,.CO6,7,86,,,,,CO.1COTable1MonthlyaveragevaluesofCOMean?1s1d1(totalhours)/mg#m-3Jan318?118(314)Feb314?214(508)Mar216?113(673)Apr118?017(474)May117?017(566)June119?017(647)July214?110(418)Aug119?016(568)Sep213?112(628)Oct310?118(589)Nov219?212(556)Dec410?314(733)Mean216?11921212,5678CO204277COFig.7LunarvariationofCO(06:00~18:00),(19:00~05:00)2.CO,CO.OH(K0132Lm):O3+hM(K0132Lm)yO(1D)+O2O(1D)+H2Oy2OHCO,(r=-01578,A=0101,n=59).,,54,OH,CO.68,57.768113116(p=0110,p=0101).68CO,75114(p0101).,751143(p0101),751136(p0101).,[20,21],OHCOOH,CO;,CO[22],CO.,7,,,CO,.7,,(1),7CO,,.3(1)CO,07:00~08:0022:00~23:002,.(2)CO,,,,.CO,CO.(3),CO,.CO.(4)CO12,5.,.致谢:.:[1]DerelElsom,SmogAlert.ManagingUrbanAirQuality[M].London:EarthscanPublicationsLtd.,1996.225.[2],,,.O3,NOxCO[J].,2000,10(4):338~342.[3]USEnvironmentalProtectionAgency.Airqualitycriteriaforcarbonmonoxide,Rep.EPA/600/8-90/045F,OfficeofHealthandEnvironmentalAssessment,EnvironmentalCriteriaandAssessmentOffice.ResearchTrianglePark,NC,Availablefrom:NTIS,Springfield,VA,1991.PB93-167492.[4]LevyH.IINormalatmosphere:Largeradicalandformaldehydeconcentrationspredicted[J].Science,1971,173:141~143.2052[5]KhalilMAK,RasmussenRA.Theglobalcycleofcarbonmonoxide:trendsandmassbalance[J].Chemosphere,1990,20:227~242.[6]LawrenceMG.PhotochemistryinthetropicalPacifictroposphere:Studieswithaglobal3-Dchemistry-meteorologymodel[D].Atlanta:GeorgiaTech,1997.[7]MckeenSA,Hsi