The slab ocean El Niño
The slab ocean El Niño
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DOI：
10.1029/2010gl044888
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发表时间：
2010-05
影响因子：
5.2
通讯作者：
D. Dommenget
中科院分区：
文献类型：
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作者：
D. Dommenget
在一系列的大气模式模拟耦合到一个简单的板状海洋模式，它表明，厄尔尼诺类型的SST变化可以存在于没有任何海洋动力学。大气对云量的反馈和风场的变化可产生正反馈和延迟的负反馈，再加上上层海洋的热容量，可在赤道太平洋产生一种阻尼的年际振荡，其强度与观测到的现象相当，并具有其特征。SST模式的演变类似于厄尔尼诺的SST模式，但完全受大气反馈控制。这些结果挑战并扩展了我们目前对气候模式中厄尔尼诺反馈机制的理解，还可能突出可能部分控制某些观测到的ENSO事件的大气机制。
In a series of Atmospheric model simulations coupled to a simple slab ocean model it is illustrated that El Niño type of SST variability can exist in the absence of any ocean dynamics. Atmospheric feedbacks in cloud cover and changes in the wind field can produce positive and delayed negative feedbacks that together with the heat capacity of the upper ocean can produce a damped interannual oscillation in the equatorial Pacific that is comparable in strength and has characteristics to the observed phenomenon. The evolution of the SST pattern is similar to the SST‐mode of El Niño, but is entirely controlled by atmospheric feedbacks. The results challenge and extend our current understanding of the feedback mechanisms of El Niño in climate models and may also highlight possible atmospheric mechanisms that could partly control some observed ENSO events.