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学科主题: Meteorology & Atmospheric Sciences
题名: Comparison of the structure of the ITCZ in the West Pacific during the boreal summers of 1989-93 using AMIP simulations and ECMWF reanalysis
作者: Chan, SC ; Evans, JL
刊名: JOURNAL OF CLIMATE
发表日期: 2002-01-01
卷: 15, 期:24, 页:3549-3568
收录类别: sci
部门归属: Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA
摘要: The dynamic structure and interannual variability of the ITCZ in the western North Pacific and east Asia during the boreal summers of 1989-93 are investigated. European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses are used to characterize the dynamical structure of the ITCZ. The ITCZ structure in the National Center for Atmospheric Research (NCAR) Community Climate Model 3 (CCM3.6) and the National Aeronautics and Space Administration ( NASA) Goddard Institute of Space Studies (GISS) SI2000 GCM is also explored. The ITCZ axis can be partitioned into three sections in the western North Pacific and east Asia: the continental monsoon trough (CMT) in India, the Bay of Bengal, and Indo-China; the oceanic monsoon trough (OMT) in the Pacific warm pool; and the trade wind trough (TWT) in the central Pacific. The confluence point (CP) is defined as an area where the broad cyclonic flow in OMT changes to the easterly trades of the TWT. East of the CP, both GCMs simulate a weaker easterly trade wind regime with a broader ITCZ due to the dislocation of the Pacific high. To the west of the CP, both GCMs simulate a weaker cross-equatorial flow and OMT. Both models show skill in simulating the interannual variability of the location of the CP; however, for the peak ENSO warm phase years (1992-93), the spread among ensemble members of the CP longitude is comparable to the shift of ensemble mean CP location relative to 1989. That is, the internal variability of each GCM is on the same order as the simulated interannual variability in this region.
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/8497
Appears in Collections:海洋科技动态信息-印太暖池系统研究_期刊论文

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Recommended Citation:
Chan, SC; Evans, JL.Comparison of the structure of the ITCZ in the West Pacific during the boreal summers of 1989-93 using AMIP simulations and ECMWF reanalysis,JOURNAL OF CLIMATE,2002,15(24):3549-3568
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文件名: Comparison of the structure of the ITCZ in the West Pacific during the boreal summers of 1989-93 using AMIP simulations and ECMWF reanalysis.pdf
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