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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Can El Nino induce stratosphere-troposphere exchange of ozone?
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Can El Nino induce stratosphere-troposphere exchange of ozone?

机译：厄尔尼诺现象能引起平流层-对流层臭氧交换吗？

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The possibility of stratosphere troposphere exchange (STE) of ozone induced by El Nino has been studied over the Indian region for two events spanning the periods April 1997 May 1998 and August 2006 February 2007 using in situ and satellite-based measurements. The response of STE to El Nino was observed to be opposite in the tropics and extra tropics. In the tropics, lifting of polluted, ozone-rich surface air led to reduced lower tropospheric and enhanced upper tropospheric and lower stratospheric ozone during the El Nino period, indicating transport from the troposphere into the stratosphere. Conversely, in the extra tropics, sinking motion from the stratosphere into the troposphere resulted in higher upper tropospheric ozone concentration, during the El Nino period. An increase in the middle and lower tropospheric ozone during the La Nina period immediately following the El Nino period suggests that the response of STE to El Nino did not manifest concurrently with the period of El Nino, but lagged by several months. El Nino southern oscillation (ENSO)-induced changes in total ozone are more prominent in the extra tropics of the northeast, compared to northwest India. However, as vertical ozone profiles are available for only two El Nino events, and the ozone variability between El Nino and La Nina events are relatively small, more detailed studies are needed to understand the dynamic influence of ENSO in producing ozone variability in India.
机译：在印度地区，对1997年4月至1998年5月以及2006年8月至2007年2月这两个事件进行了厄尔尼诺现象引起的平流层对流层臭氧交换（STE）的可能性的研究，使用的是现场观测和卫星观测。在热带地区和热带地区，观察到STE对厄尔尼诺现象的反应是相反的。在热带地区，被污染的富含臭氧的地面空气的抬升导致厄尔尼诺时期的对流层下部臭氧减少，对流层上部和平流层下部臭氧增加，这表明从对流层向平流层的迁移。相反，在热带地区，在厄尔尼诺时期，从平流层向对流层的下沉运动导致较高的对流层臭氧浓度。在紧接厄尔尼诺时期之后的拉尼娜时期，对流层中层和下层臭氧的增加表明，对厄尔尼诺现象的STE反应并非与厄尔尼诺时期同时出现，而是滞后了几个月。与印度西北部地区相比，厄尔尼诺州南部振荡（ENSO）引起的总臭氧变化在东北部的热带地区更为突出。但是，由于垂直臭氧剖面仅可用于两个厄尔尼诺事件，而且厄尔尼诺事件和拉尼娜事件之间的臭氧变化相对较小，因此需要更详细的研究以了解ENSO在印度产生臭氧变化的动态影响。

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