2008年冬季—2009年春季干旱的大气结构与地球转动特征  

Characteristics of atmospheric structure and earth rotation of drought from winter in 2008 to spring in 2009

作　　者：魏鸣[1] 欧阳首承[2] 

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]成都信息工程学院,成都610041

出　　处：《中国工程科学》2011年第1期49-55,共7页Strategic Study of CAE

基　　金：国家自然科学基金项目(60674074);高校博士点专项科研基金联合资助课题(20093228110002);江苏省高校自然科学研究重大基础研究项目(10KJA170030);灾害天气国家重点实验室开发课题(2010LASW-A01)

摘　　要：针对干旱预测的难题,利用揭示大气热结构垂直特征的V-3θ图,分析影响旱区的气流特征。根据国际地球自转服务(IERS)的数据,分析地球极移、章动和转速的变化与大气热结构变化的关系,基于地气动量守恒原理,将大气热结构与地球转动特征变化进行了制约性分析。结果表明,大气热结构异常和地球转动特征引起的冷空气路径变化与大范围干旱有关。The airflow characteristics impacted on the drought areas were analyzed with V- 3θ plot which revealed characteristics of the atmospheric thermal structure. The relationship between the atmospheric thermal structure and the variation of earth rotation （ length of day, nutation, polar motion） was analyzed with the update data of IERS. Based on the total momentum conservation of earth and atmosphere, the variations between the at- mospheric thermal structure and the earth rotation were restricted to each other. The research results showed that large scale drought was related to the air path change caused by characteristics of atmospheric structure and the earth rotation.

关 键 词：干旱 冷空气路径 回流 章动 极移 

分 类 号：P429[天文地球—大气科学及气象学] P434