...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Climate dynamics >Analysis of the tropical climate variability in a two-column framework
【24h】

Analysis of the tropical climate variability in a two-column framework

机译：两栏框架下的热带气候变异性分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work examines the relevance of a classical two-column modeling framework of the tropical climate in terms of observed natural variability. A method is developed to analyze the observed tropical climate in a simple framework that features a moist, ascending column and a dry, subsiding one. This method is used to analyze the natural variability of the tropical climate in the ERA40 reanalysis and in ISCCP satellite data. It appears that the seasonal cycle of the tropic-wide sea surface temperature (SST) is almost linearly linked to the seasonal cycle of the relative area of the moist regions, as predicted by the sensitivity of the two-column models. A more detailed analysis shows that this link is the product of a complex interaction and adjustments between the moist and dry regions. The seasonal cycle of low-cloud cover in the dry regions also appears to interact with the SST seasonal cycle: the low-cloud cover influences the tropic-wide SST via its direct radiative forcing on the local SST and it appears to be controlled by the SST difference between moist and dry regions. By contrast, the SST interannual variability appears to be driven by the El Nino Southern Oscillation (ENSO), with no significant impact from the changes in the relative area of the moist regions or in the low-cloud cover in the dry regions independently of the ENSO. ENSO-related changes in the area of moist regions and low-cloud cover constitute negative feedbacks on the ENSO-related SST variability.
机译：这项工作根据观察到的自然变异性检验了热带气候的经典两栏建模框架的相关性。开发了一种在简单的框架中分析观测到的热带气候的方法，该框架具有潮湿的上升柱和干燥的下陷柱。该方法用于在ERA40再分析和ISCCP卫星数据中分析热带气候的自然变异性。正如两栏模型的敏感性所预测的那样，看起来热带地区海表温度（SST）的季节周期几乎与湿润地区相对面积的季节周期线性相关。更详细的分析表明，这种联系是潮湿和干燥地区之间复杂的相互作用和调整的产物。干旱地区低云层的季节周期似乎也与海表温度季节周期相互作用：低云层通过其对本地海表温度的直接辐射强迫影响热带地区的海表温度，并且似乎受热带气旋的控制。干燥和干燥区域之间的SST差异。相比之下，海表温度的年际变化似乎是由厄尔尼诺南方涛动（ENSO）驱动的，而不受干旱地区相对湿度或干燥地区低云量变化的影响没有明显影响。 ENSO。潮湿地区和低云覆盖区域的ENSO相关变化构成了ENSO相关SST变异性的负反馈。

著录项

  • 来源
    《Climate dynamics》 |2011年第2期|p.73-81|共9页
  • 作者

    Gilles Bellon; Guillaume Gastineau; Aurelien Ribes; Herve Le Treut;

  • 作者单位

    Centre National de Recherches Meteorologiques,CNRS and Meteo France, 42, avenue Gaspard Coriolis,31057 Toulouse Cedex 01, France;

    Laboratoire de Meteorologie Dynamique, Institut Pierre-Simon Laplace, CNRS and Ecole Normale Superieure, Paris, France;

    Centre National de Recherches Meteorologiques,CNRS and Meteo France, Toulouse, France;

    Laboratoire de Meteorologie Dynamique, Institut Pierre-Simon Laplace, CNRS and Ecole Normale Superieure, Paris, France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tropical climate; idealized framework;

    机译：热带气候;理想化框架;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号