广 西 秋 季 干 旱 成 因 分 析毕业设计.doc

广 西 秋 季 干 旱 成 因 分 析毕业设计 目 录 原创性声明 ·············································································································( I ) 使用授权声明 ········································································································(Ⅱ) 中文摘要 ················································································································(III) ABSTRACT ············································································································(Ⅴ) 目 录 ····················································································································(Ⅶ) 第 1 章 前言 ······································································································· (1) 1.1 有关干旱的描述和对干旱特征的研究···················································(2) 1.2 有关干旱成因的研究···············································································(3) 1.3 有关广西干旱的研究···············································································(4) 1.4 存在的问题以及本论文的研究内容·······················································(5) 第 2 章 资料和分析方法 ··················································································· (7) 2.1 资料来源 ·································································································(7) 2.2 主要概念定义和研究方法简介 ·····························································(7) 第 3 章 广西秋季干旱的气候特征及近期极端干旱个例介绍·························(13) 3.1 广西秋季气候概况··················································································(13) 3.2 广西秋季降水的时空变化特征······························································(14) 3.3 广西秋季干旱的分布和变化特征··························································(20) 3.4 广西近期秋季极端干旱个例介绍··························································(22) 3.5 小结 ········································································································(24) 第 4 章 广西秋季干旱（降水）年际、年代际变化的相关因子特征分析··········(25) 4.1 广西秋季干旱（降水）与同期海洋热力变化的相