| 热带平流层臭氧准两年周期振荡的特征及数值模拟 |
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| 作者姓名： | Chen Yuejuan Zheng Bin Zhang Hong |
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| 作者单位： | Chen Yucjuan Zheng Bin and Zhang HongDepartment of Earth and Space Sciences，University of Science and Technology of China，Hefei，230026 |
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| 摘 要： | 利用HALOE的观测资料、对热带地区平流层臭氧垂直分布的年际变化及其准两年周期振荡（QBO）进行研究，并同赤道上空平均的纬向风场的准两年周期振荡进行了模拟研究。资料分析结果表明，平流层臭氧浓度高值区的位置在南北方向上和垂直方向上的有明显的准两年周期，臭氧浓度高值中心的南北移动和上下移动又引起局地臭氧总量的周期性变化和准两年周期振荡南北半球不对称。而臭氧浓度中心位置的准两年周期变化与赤道上空平均纬向风的准两年周期振荡密切相关。资料分析还表明，赤道上空平流层中臭氧浓度QBO的位相随高度变化多次。模拟试验表明，纬向风QBO引起垂直经圈环流的变化，在平流层有三对余差环流圈。它们对O3在不同纬度和高度的输送是引起O3准两年周期振荡的重要动力原因。其中，余差环流在平流层中层（25－35km)的环流圈起着重要的作用。
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| 关 键 词： | 热带平流层 准两年周期振荡 臭氧 HALOE资料 NCAR模式 数值模拟 QBO |
| 收稿时间： | 22 June 2001 |
The features of ozone quasi—biennial oscillation in tropical stratosphere and its numerical simulation |
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| Chen Yuejuan,Zheng Bin,Zhang Hong.The features of ozone quasi—biennial oscillation in tropical stratosphere and its numerical simulation[J].Advances in Atmospheric Sciences,2002,19(5):777-793. |
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| Authors: | Chen Yucjuan Zheng Bin Zhang Hong |
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| Institution: | Department of Earth and Space Sciences, University of Science and T echnology of China, Ilefei, 230026,Department of Earth and Space Sciences, University of Science and T echnology of China, Ilefei, 230026,Department of Earth and Space Sciences, University of Science and T echnology of China, Ilefei, 230026 |
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| Abstract: | The interannual variation of the vertical distribution of ozone in the tropical stratosphere and itsquasi-biennial oscillation (QBO) is analyzed using HALOE data. The results are compared with the windQBO. A numerical experiment is carried out to study the effects of wind QBO on the distribution, and varia-tion of ozone in the stratosphere by using the NCAR interactive chemical, dynamical, and radiativetwo-dimensional model (SOCRATES). Data analysis shows that the location of the maximum ozone mix-ing ratio in the stratosphere changes in the meridional and vertical directions, and assumes a quasi-biennialperiod. The meridional and vertical motion of the maximum mixing ratio leads to a QBO of column ozoneand its hemispheric asymmetry. The QBO of the location of the maximum is closely connected with the zon-al wind QBO. The data analysis also shows that in the tropical region, the phase of the QBO for ozone den-sity changes many times with height. Numerical simulation shows that the meridional circulation induced bythe wind QBO includes three pairs of cells in the stratosphere, which have hemispheric symmetry. Thetransport of ozone by the induced meridional circulation in various latitudes and heights is the main dynam-ic cause for the ozone QBO. Cells of the induced circulation in the middle stratosphere (25-35 km) play animportant role in producing the ozone QBO. |
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| Keywords: | ozone quasi-biennial oscillation (QBO) HALOE data NCAR model numerical simulation SOCRATES |
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