| ENSO对平流层气溶胶分布的影响 |
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| 引用本文： | 周任君,蔡宏珂,易明建,郭静超.ENSO对平流层气溶胶分布的影响[J].地球物理学报,2011,54(11):2726-2734. |
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| 作者姓名： | 周任君 蔡宏珂 易明建 郭静超 |
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| 作者单位： | 中国科学技术大学地球与空间科学学院,合肥 230026 |
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| 基金项目： | 国家自然科学基金(40705014,40633015),国家重点基础研究发展计划(2010CB428603)和中央高校基本科研业务费专项资金(WK2080000011)资助. |
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| 摘 要： | 本文采用ONI(Oceanic Nino Index)和HALOE(Halogen Occultation Experiment)气溶胶面积密度资料,从其滞后相关性入手分析了ENSO循环对平流层气溶胶的影响,通过对滞后于El Nino和La Nina时气溶胶含量的比较探讨了ENSO强迫的影响程度,并用剩余环流及其输送量...
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| 关 键 词： | 平流层气溶胶 ENSO 滞后相关 剩余环流 |
| 收稿时间： | 2010-12-28 |
The impact of the ENSO cycle on the stratospheric aerosol distribution |
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| ZHOU Ren-Jun,CAI Hong-Ke,YI Ming-Jian,GUO Jing-Chao.The impact of the ENSO cycle on the stratospheric aerosol distribution[J].Chinese Journal of Geophysics,2011,54(11):2726-2734. |
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| Authors: | ZHOU Ren-Jun CAI Hong-Ke YI Ming-Jian GUO Jing-Chao |
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| Institution: | The School of Earth and Space Sciences, USTC, Hefei 230026, China |
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| Abstract: | In this paper the Oceanic Nino Index and the HALOE dataset were used to study the impact of the ENSO cycle on the stratospheric aerosols by analyzing the lag correlation. The comparison of aerosol surface area after El Nino and the La Nina images the impact clearly and the change can be explained according to the transporting velocity and stream situation. The result displays that ENSO significantly affects the distribution of stratospheric aerosols, especially above the equator and low latitude. Within six months after El Nino, the aerosol surface density in the tropical lower-stratosphere layer is larger than the average while it's smaller in the middle stratosphere; however, the situation was contrary after La Nina. El Nino and La Nina had significantly different effects, which made the differences in aerosol content in 60 hPa as high as 45%. The change of aerosol surface density in the six months lag could be up to 16% as the temperature changed 1 K. The strong influence of ENSO could last for about six months and faded out in 2 years. Changes in the tropics were stronger than in the middle and high latitudes, while the characteristics of northern and southern hemispheres are different. ENSO lead to a change in the aerosol delivery by affecting the residual circulation, and in turn lead to these differences of the aerosol distribution mentioned above. |
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| Keywords: | Stratospheric aerosols ENSO Lag correlation Residual circulation |
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