【摘 要】
：
利用热带地区垂直翻转环流分解方法(简称“M1”)和全球大气环流三型分解方法(简称“M2”),采用7套再分析资料,分析地面以下虚假经向风场(fake below-ground meridional wind,FBGMW)对非洲大陆地区Hadley环流(Hadley circulation in Africa,AFHC)气候态、年际变率和线性趋势的影响.结果表明:(1)对于气候态而言,FBGMW对AFHC强度、AFHC公共上升支和南北半球下沉支的影响取决于季节和质量流函数计算方法的选取.(2)除了AFHC公共
【机 构】
：
中国气象局兰州干旱气象研究所,甘肃 兰州 730020;甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点实验室,甘肃 兰州 730020;盐城工学院环境科学与工程学院,江苏 盐城
论文部分内容阅读
利用热带地区垂直翻转环流分解方法(简称“M1”)和全球大气环流三型分解方法(简称“M2”),采用7套再分析资料,分析地面以下虚假经向风场(fake below-ground meridional wind,FBGMW)对非洲大陆地区Hadley环流(Hadley circulation in Africa,AFHC)气候态、年际变率和线性趋势的影响.结果表明:(1)对于气候态而言,FBGMW对AFHC强度、AFHC公共上升支和南北半球下沉支的影响取决于季节和质量流函数计算方法的选取.(2)除了AFHC公共上升支,FBGMW对南北半球AFHC强度、AFHC下沉支位置年际变率的影响很小.不考虑FBGMW会使得M1方法对应的冬季和夏季以及M2方法对应的冬季AFHC公共上升支年际变率减小,M1和M2方法对应的秋季AFHC公共上升支年际变率增加.不考虑FBGMW导致M1方法对应的春季和M2方法对应的春季和夏季AFHC公共上升支年际变率的变化依赖于资料的选取.(3)尽管不考虑FBGMW会导致AFHC强度以及AFHC公共上升支和南北半球下沉支位置线性趋势的数值发生变化,但关于AFHC线性趋势的主要结论未改变.
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