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大气科学  2004 

21层大气环流模式IAPAGCM-Ⅲ的设计及气候数值模拟Ⅰ.动力框架

DOI: 10.3878/j.issn.1006-9895.2004.05.02

Keywords: 大气环流模式,动力框架,非线性迭代时间积分方案

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Abstract:

设计了IAP(InstituteofAtmosphericPhysics,ChineseAcademyofSciences)AGCM-III,对其动力框架作说明和检验,时间积分采用改进的非线性迭代法.用Rossby-Haurwitz波对框架进行了波型检验、能量检验和波速检验.结果表明,非线性迭代3次的时间积分方案具有较好的稳定性,能够有效地抑制短波,同时对长波的歪曲较小,且时间积分步长可放得较大;该框架能够较长时间地保持Rossby-Haurwitz4波波型,在积分过程中能够较高精度地保持总有效能量守恒;模式计算的Rossby-Haurwitz波速为每天西传15个经度,这与理伦值很接近.

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