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What determines the amplitude of ENSO events?
  • 期刊名称:Atmospheric and Oceanic Science Letters
  • 时间:2013.1.1
  • 页码:90-96
  • 分类:P732[天文地球—海洋科学] TU834.3[建筑科学—供热、供燃气、通风及空调工程]
  • 作者机构:[a] Department of Atmospheric and Oceanic Sciences & Laboratory for Climate and Ocean-Atmosphere Studies (LaCOAS), School of Physics, Peking University, Beijing 100871, China[b] Geophysical Institute and Bjerknes Centre for Climate Research, University in Bergen, Bergen, Norway
  • 相关基金:supported by the National Natural Science Foundation of China (Grant Nos. 40976007 and 41176002);the Special Fund for Meteorological Scientific Research in the Public Interest of China Meteorological Administration (Grant No. GYHY201006022);the Norwegian Research Council through the East Asian DecCen Project (Grant No. 193690/S30)
  • 相关项目:气候系统响应时间尺度及可逆性研究
中文摘要:

在这篇论文, El Ni 的紧张上的海洋的 upwelling 的动态效果 ?o 南部的摆动(ENSO ) 用一个简单联合模型(Zebiak 藤条模型) 被学习。在温度可变性方程的学期平衡分析证明吝啬的垂直温度坡度的异常 upwelling 和异常南方的温度坡度的吝啬的移流是决定 ENSO 事件的紧张的二个很重要的因素,在哪个在东方赤道的太平洋( EEP )的垂直的海洋的热流动是主要影响因素。当前者到一~二个星期带后者时,在垂直的热流动(甚高频) 和 ENSO 紧张之间的 lag 关联证明最高的关联发生。甚高频断然在 EEP 与背景 thermocline 力量被相关,并且两个的增加能导致强壮的 ENSO 可变性。强迫并且联合的实验的比较建议联合过程能影响 ENSO 的紧张和频率。

英文摘要:

In this paper, the dynamic effect of oceanic upwelling on the intensity of E1 Nifio-Southern Oscilla tion (ENSO) is studied using a simple coupled model (Zebiak-Cane Model). The term balance analysis in the temperature variability equation shows that the anomalous upwelling of the mean vertical temperature gradient and the mean advection of the anomalous meridional tem perature gradient are the two of most important factors that determine the intensity of ENSO events, in which the "vertical oceanic heat flux" in the eastern equatorial Pa cific (EEP) is the primary influencing factor. The lag cor relation between "vertical heat flux (VHF)" and ENSO intensity shows that the highest correlation occurs when the former leads the latter by one to two weeks. The VHF is positively correlated with the background thermocline strength in the EEP, and an increase of both could result in strong ENSO variability. Comparison of the forced and coupled experiments suggests that the coupled process can affect both the intensity and freauencv of ENSO.

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