甘肃省对流层顶高度的季节变化特征分析  

Analysis on Seasonal Variation of Tropopause Height over Gansu Province

作　　者：杨双艳[1] 周顺武[1,2] 陈鹤[1] 

机构地区：[1]南京信息工程大学,气象灾害省部共建教育部重点实验室,南京210044 [2]南京信息工程大学大气科学学院,南京210044

出　　处：《气象》2010年第4期57-62,共6页Meteorological Monthly

基　　金：国家自然科学基金项目(40675058);中国气象局成都高原气象研究所开放实验室基金(LPM2008007)

摘　　要：根据甘肃省8个探空站25年(1980—2004年)的对流层顶观测资料,分析了第一对流层顶和第二对流层顶高度的季节变化特征,结果表明:(1)全省各站全年各月均可观测到复合对流层顶,两类对流层顶存在着明显的季节差异,冬(夏)季以第一(二)对流层顶为主。(2)第一对流层顶的平均高度在春、秋(冬、夏)季相对较高(低),年变化曲线呈双峰型;第二对流层顶的平均高度在春、夏(秋、冬)季相对较高(低),年变化表现出单峰型。(3)两类对流层顶高度均存在明显的年际变化,除秋季外,各个季节第一(二)对流层顶普遍存在5～6 a(准3 a)的周期振荡。(4)近25年来甘肃省两类对流层顶主要以上升趋势为主,特别是在夏季两类对流层顶高度均存在明显的上升趋势。Based on the tropopause observation data of eight sounding stations from 1980 to 2004 over Gan- su Province, the seasonal variations of the first and the second tropopause heights were analyzed. The results indicated that there are significant seasonal differences in the two kinds of tropopause over Gansu Province. The second （first） tropopause is the main type in summer （winter）. The annual average height of the first tropopause is higher in spring and autumn than in winter and summer, the average height of the second tropopause is lower in autumn and winter than in spring and winter. There is an obvious annual variation in the tropopause height in this location, the first tropopause height in each season has a periodic oscillation of 5 to 6 years, the second tropopause heigh has a quasi-oscillation of 3 years. The two kinds of tropopause heights in each season have a mainly rising trend in Gansu Province in the recent 25 years, especially in summer.

关 键 词：第一对流层顶高度 第二对流层顶高度 季节变化 

分 类 号：P421.31[天文地球—大气科学及气象学]