青藏高原积雪对广西气候影响的过程和物理机制分析  

The Analysis for Qinghai-Tibet Plateau Snow Affecting Process and Physical Mechanism to Guangxi Climate

作　　者：李秀存[1] 覃志年[2] 苏志[3] 覃峥嵘[1] 杨兰英 

机构地区：[1]广西气象局,广西南宁530022 [2]广西气象台,广西南宁530022 [3]广西气象科技信息服务中心,广西南宁530022 [4]广西钦州市气象局,广西钦州530005

出　　处：《广西气象》2005年第1期17-19,共3页Journal of Guangxi Meteorology

摘　　要：利用1967～1997年500hPa高度场及同期副热带高压资料,分别将年、春、夏、秋、冬季的青藏高原积雪与这两者之间的联系进行分析,并"借用"他人通过数值模拟所得结果来印证由统计分析而得到的相关关系,从而揭示青藏高原积雪对广西气候影响的过程和物理机制。结果表明:青藏高原积雪多、少雪年时,在高原主体所处的范围以及我国以北以贝加尔湖为中心的区域范围内,500hPa高度场的距平符号呈反向变化形式,高原多雪时,高原主体上层500hPa高度场为负距平,高原少雪时,则为正距平。而青藏高原多雪时,太平洋副热带高压脊线要比少雪年位置偏南。This paper studies and analyzes the data of the 500hPa height field and the subtropical high during 1967～1997 comparing with Qinghai-Tibet Plateau snow in terms of year, spring, summer, autumn, and winter, and obtains and verifies the correlation through the numerical simulation and the statistical analysis by other people. Thus reveals the Qinghai-Tibet Plain snow affecting process and physical mechanism to the Guangxi climate. The result indicates that, when the more snow and less snow years assuming the scope of the plateau main body as well as the scope of the north of our country taking Lake Baikal as its center, the departure marks of their 500hPa height field present a reverse change form. The 500hPa height field of the upper main body of plateau shows negative departure in the years of more snow. And also the crest line of the subtropical high in Pacific Ocean moves to a further south position.

关 键 词：青藏高原积雪 气候影响 500hPa高度场 机制分析 广西 副热带高压脊线 1997年 相关关系 统计分析 数值模拟 物理机制 区域范围 贝加尔湖 距平 太平洋 主体 上层 

分 类 号：P461[天文地球—大气科学及气象学] TV122[水利工程—水文学及水资源]