简介：Thisstudycomparestheclimatologyandlong-termtrendofnorthernwinterstratosphericresidualmeanmeridionalcirculation(RMMC),aswellasitsresponsestoElNi?o-SouthernOscillation(ENSO),stratosphericQuasiBiennialOscillation(QBO),andsolarcycleintenreanalysesandastratosphere-resolvingmodel,CESM1-WACCM.TheRMMCisalarge-scalemeridionalcirculationcellinthestratosphere,usuallyreferredtoastheestimateoftheBrewerDobsoncirculation(BDC).ThedistributionoftheBDCisgenerallyconsistentamongmultiplereanalysesexceptthattheNOAAtwentiethcenturyreanalysis(20RC)largelyunderestimatesit.Mostreanalyses(exceptERA40andERA-Interim)showastrengtheningtrendfortheBDCduring1979–2010.AllreanalysesandCESM1-WACCMconsistentlyrevealthatthedeepbranchoftheBDCissignificantlyenhancedinElNi?owintersasmorewavesfromthetropospheredissipateinthestratosphericpolarvortexregion.AsecondarycirculationcelliscoupledtothetemperatureanomaliesbelowtheQBOeasterlycenterat50hPawithtropicalupwelling/coolingandmidlatitudedownwelling/warming,andsimilarsecondarycirculationcellsalsoappearbetween50–10hPaandabove10hPatobalancethetemperatureanomalies.ThedirectBDCresponsetoQBOintheupperstratospherecreatesabarriernear30°Ntopreventwavesfrompropagatingtomidlatitudes,contributingtotheweakeningofthepolarvortex.TheshallowbranchoftheBDCinthelowerstratosphereisintensifiedduringsolarminima,andthedownwellingwarmstheArcticlowerstratosphere.ThestratosphericresponsestoQBOandsolarcycleinmostreanalysesaregenerallyconsistentexceptinthetwo20CRs.

简介：Asthestrongestsubseasonalatmosphericvariabilityduringborealwinter,threeremarkablesuddenstratosphericmajorwarming(SSW)eventsinthe2000sareinvestigatedintermsoftheBrewer–Dobsoncirculation(BDC)response.Ourstudyshowsthatthechangesofcross-isentropicvelocityduringtheSSWsarenotonlyconfinedtothepolarregion,butalsoextendtothewholeNorthernHemisphere:enhanceddescentinthepolarregion,aswellasenhancedascentinthetropics.WhentheaccelerationofthedeepbranchoftheBDCdescendstothemiddlestratosphere,itsstrengthrapidlydecreasesoveraperiodofonetotwoweeks.TheaccelerationofthedeepbranchoftheBDCisdrivenbytheenhancedplanetarywaveactivityinthemid-to-high-latitudestratosphere.DifferentfromtherapidresponseofthedeepbranchoftheBDC,tropicalupwellinginthelowerstratosphereacceleratesupto20%–40%comparedwiththeclimatology,20–30daysaftertheonsetoftheSSWs,andtheaccelerationlastsforonetothreemonths.Theenhancementoftropicalupwellingisassociatedwiththelarge-scalewave-breakinginthesubtropicsinteractingwiththemidlatitudeandtropicalQuasi-BiennialOscillation–relatedmeanflow.

简介：根据2007年气象行业专项“MKIII型Brewer光谱仪的臭氧总量观测传递标准建立及对卫星遥测O3，SO2，NO2总量及UV波段光学厚度的标定技术研究（GYHY200706038）”的工作计划要求，中国气象科学研究院郑向东研究员于2009年9月6～27日参加了由WMO／GAW在西班牙举行的Brewer光谱仪标定比对观测（7～17日）和在意大利北部山区Aosta举行的第12次Brewer臭氧光谱仪学术会议（19～25日）。

简介：通过对1993年9月～2003年11月瓦里关地区（36．17°N，100．53°E）Brewer资料和TOMS资料的比较分析，结果表明：1）瓦里关Brewer臭氧光谱仪的观测数据与卫星的TOMS观测数据之间存在一定的差异，两者的差异80％以上集中在-2．5％～2．5％之间；2）1993～2003年瓦里关地区的大气臭氧总量有着明显的下降趋势，这与北半球中纬度地区观测到的平流层臭氧减少的趋势相吻合；3）瓦里关地区大气臭氧总量存在明显的年际变化和季节变化，且每年的2～4月较高，8～10月较低，一年中振荡的幅度达到60DU；4）TOMS两个版本的观测数据与地面观测结果呈现出较好的一致性和相关性，相关系数达到0．9以上。

简介：1概况我国的大气本底站主要利用Brewer光谱仪开展臭氧柱总量及紫外辐射的观测。为进一步加强我国本底站臭氧柱总量观测业务，推进与国际间的观测技术交流，中国气象局气象探测中心张晓春和王缅应WMO邀请于2017年9月2—10日参加了第16次世界气象组织（WMO）全球大气监测网（GAW／WMO）臭氧总量及廓线Brewer光谱仪亚太地区操作员培训班。