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大气科学  2006 

大尺度凝结水在下落过程中的蒸发对模拟气候特征的影响

DOI: 10.3878/j.issn.1006-9895.2006.06.10

Keywords: 大尺度凝结,蒸发作用,模拟,F检验,t检验

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Abstract:

将新的大尺度凝结水在降落过程中蒸发量计算的方案引入p-σ混合坐标系初始方程九层模式中,运用1979~1995年NCEP/NCAR再分析资料月平均场作为初始场和侧边界强迫,模拟得到1月和7月气候特征,并用F检验和t检验方法检验了原大尺度凝结方案与新方案模拟结果差异的显著性.结果表明,在大尺度凝结降水中出现蒸发的大部分地区为我国东部和南部的沿海地区以及相应的海洋上.模拟的气候特征的差异主要集中在我国东部以及东南沿海一带的大陆和海洋,其中在总降水场的模拟结果中,较好地消除了原模式在华北地区的虚假大值区.检验结果表明,7月的差异比1月的显著,而且各要素平均值的差异不大,方差的差异比较显著.

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