大气科学学报
大氣科學學報
대기과학학보
JOURNAL OF NANJING INSTITUTE OF METEOROLOGY
2012年
4期
438-447
,共10页
杨双艳%周顺武%张人禾%吴萍%李慧%马振锋
楊雙豔%週順武%張人禾%吳萍%李慧%馬振鋒
양쌍염%주순무%장인화%오평%리혜%마진봉
青藏高原%对流层项高度%季节变化%上升运动%臭氧总量
青藏高原%對流層項高度%季節變化%上升運動%臭氧總量
청장고원%대류층항고도%계절변화%상승운동%취양총량
Tibetan Plateau%tropopause height%seasonal variation%ascending motion%total ozone
根据1979-2008年青藏高原地区14个探空站对流层项气压资料以及同期各标准等压面上的温度资料,分析了不同季节高原上空两类对流层顶高度与高空各层温度之间的关系;在此基础上,结合同期的NCEP/NCAR月平均再分析资料以及NASA提供的TOMS/SBUV月平均臭氧总量资料,分别讨论了高原上升运动以及高原臭氧总量与对流层顸高度的耦合关系。结果表明:高原第一(二)对流层顶高度全年处在300~200hPa(100hPa附近)高度,在季节变化、年际变化以及长期变化趋势上,两类对流层顸高度与各自对应高度层上的温度存在着密切的反相变化关系,当对流层顶高度偏高(低)时,相应高度上的温度偏低(高)。上升运动有助于两类对流层顶高度的抬升,尤其是当高空200(100)hPa附近有上升运动时,有利于第一(二)对流层项高度抬升。各季节高原臭氧总量与第二对流层顶高度均呈显著的负相关关系,当臭氧含量减少(增加)时,该对流层顶高度将偏高(偏低),近年来伴随着高原臭氧总量的减少,高原第二对流层顸高度出现了明显的抬升。
根據1979-2008年青藏高原地區14箇探空站對流層項氣壓資料以及同期各標準等壓麵上的溫度資料,分析瞭不同季節高原上空兩類對流層頂高度與高空各層溫度之間的關繫;在此基礎上,結閤同期的NCEP/NCAR月平均再分析資料以及NASA提供的TOMS/SBUV月平均臭氧總量資料,分彆討論瞭高原上升運動以及高原臭氧總量與對流層頇高度的耦閤關繫。結果錶明:高原第一(二)對流層頂高度全年處在300~200hPa(100hPa附近)高度,在季節變化、年際變化以及長期變化趨勢上,兩類對流層頇高度與各自對應高度層上的溫度存在著密切的反相變化關繫,噹對流層頂高度偏高(低)時,相應高度上的溫度偏低(高)。上升運動有助于兩類對流層頂高度的抬升,尤其是噹高空200(100)hPa附近有上升運動時,有利于第一(二)對流層項高度抬升。各季節高原臭氧總量與第二對流層頂高度均呈顯著的負相關關繫,噹臭氧含量減少(增加)時,該對流層頂高度將偏高(偏低),近年來伴隨著高原臭氧總量的減少,高原第二對流層頇高度齣現瞭明顯的抬升。
근거1979-2008년청장고원지구14개탐공참대류층항기압자료이급동기각표준등압면상적온도자료,분석료불동계절고원상공량류대류층정고도여고공각층온도지간적관계;재차기출상,결합동기적NCEP/NCAR월평균재분석자료이급NASA제공적TOMS/SBUV월평균취양총량자료,분별토론료고원상승운동이급고원취양총량여대류층한고도적우합관계。결과표명:고원제일(이)대류층정고도전년처재300~200hPa(100hPa부근)고도,재계절변화、년제변화이급장기변화추세상,량류대류층한고도여각자대응고도층상적온도존재착밀절적반상변화관계,당대류층정고도편고(저)시,상응고도상적온도편저(고)。상승운동유조우량류대류층정고도적태승,우기시당고공200(100)hPa부근유상승운동시,유리우제일(이)대류층항고도태승。각계절고원취양총량여제이대류층정고도균정현저적부상관관계,당취양함량감소(증가)시,해대류층정고도장편고(편저),근년래반수착고원취양총량적감소,고원제이대류층한고도출현료명현적태승。
Using tropopause pressure data and upper temperature data of 14 sounding stations over the Tibetan Plateau from 1979 to 2008, the relationships between two types of tropopause heights and upper air temperature in different seasons are analyzed. Based on these, the coupling connection between as-cending motion(total ozone) and tropopause height is discussed by monthly NCEP/NCAR reanalysis data from NOAA and monthly TOMS/SBUV total ozone data from NASA. The results indicate that the first(second) tropopause is at 300-200 hPa( near 100 hPa) over the year. The seasonal, interannual variations and long-term trend of the two types of tropopause heights display closely opposite relation to those of temperature at their corresponding altitudes, respectively, namely the higher(lower) tropopause height,the lower(higher) temperature at the corresponding altitude. The ascending motion is conducive to the rising of the tropopause height, especially the ascending motion at about 200 hPa( 100 hPa) is helpful to the rising of the first(second) tropopause height. There is an obvious negative correlation be-tween the total ozone and the second tropopause height at each season. The second tropopause rises (re-duces) with the losing(increasing) of total ozone over the Tibetan Plateau. In recent years, the second tropopause height clearly lifts with the reducing of the total ozone.