| 江颖,隆霄.CESM模式对东亚地区环流特征的模拟检验[J].沙漠与绿洲气象,2018,12(2):22~31 |
| CESM模式对东亚地区环流特征的模拟检验 |
| Simulation test of the CESM model for circulation characteristic of east Asia |
| 投稿时间：2017-12-20 修订日期：2018-02-24 |
| DOI：10.12057/j.issn.1002-0799.2018.02.004 |
| 中文关键词: CESM模式,东亚地区,降水,环流 |
| 英文关键词:CESM model east Asia precipitation circulation |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 本文利用CMAP逐月降水资料和欧洲天气预报中心ERA-interim的再分析资料,分析了CESM模式对东亚地区夏季环流及降水的模拟性能。结果表明：(1)CESM可以模拟出东亚地区大气环流、水汽输送及降水随季节南北进退等主要特征；(2)该模式模拟结果与CMAP资料的对比显示,降水的空间偏差主要表现为陆地偏多,偏差最显著的区域位于青藏高原南侧,而海洋上偏少,降水偏差在季节变化上主要体现为低纬度地区语带出现时间偏早,中高纬度地区出现时间偏晚且持续时间偏长；(3)模式模拟的地表温度与ERA客观分析资料相比在陆地上偏低幅度低于海洋上的偏差幅度,这导致模式中的海陆差异减小；模式模拟的500hPa西太副高较ERA客观分析结果异常偏西至我国的江淮地区且强度偏强,这与模式模拟的江淮地区降水较CMAP结果偏少密切相关；(4)经向垂直环流的对比显示,模式模拟结果与ERA客观分析结果的主要差异出现在青藏高原及其附近地区,在高原的南北侧均出现明显的异常垂直环流,南侧的异常垂直环流伸展高度高,范围狭窄,这与模式模拟的降水在高原南侧明显偏多有关。 |
| 英文摘要: |
| This paper analyzed simulation performance of the CESM model for the summer circulation and precipitation of east Asia, by using CMAP monthly precipitation data and reanalysis data of European forecasting center. The result showed:(1) The model could simulate characteristics of circulation、water vapor flux and the process of the rain belt from the south to the north.(2) Compared to the CMAP data, the results of the model showed that the precipitation space deviation was more on land, mainly in the south of Tibetan plateau region; the simulated was less on sea; The time deviation appeared that simulated rain belt was earlier than observation in the low latitude, later in the mid-high latitude and maintain longer.(3)Compared to the ERA data, the simulated surface temperature deviation range on the land was less than those on the sea, which resulted to differences between the land and sea of model decrease; the simulated subtropical high pressure was more west in position and stronger in intense than the observed, which was not conducive to the precipitation in JiangHuai region of China; (4)Compared to ERA observation, the mainly difference between simulated meridional circulation and ERA located in south of Tibetan plateau. There was a distinct meridional circulation, south of it appeared high height and narrow range, which is in contrast with the simulated precipitation situation. |
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