准两年振荡对大气中微量气体分布的影响

Impact of the Quasi-Biennial Oscillation on the Distribution of the Trace Gases in the Stratosphere

ＮＣＡＲ 的包含化学、辐射、动力相互作用的两维模式（ＳＯＣＲＡＴＥＳ） 移植回国后进行了初步的模拟试验， 用以研究某些对环境问题重要的微量气体的化学、辐射、动力传输过程。在不考虑极地平流层云和气溶胶表面非均相化学等情况下， 模式积分多年， 计算结果稳定， 模拟的风场、温度场显示出正常的季节变化， 模拟的微量气体分布与卫星实测资料对照， 结果也比较一致。为了探讨热带平流层风场的准两年周期振荡 （ＱＢＯ） 对平流层微量气体分布的影响， 我们做了ＱＢＯ 强迫的数值试验， 即在模式中加入ＱＢＯ 强迫， 并与不考虑ＱＢＯ 强迫的模拟结果对比。结果表明，ＱＢＯ 与其相关的次级环流所引起动力输送的变化，使平流层微量气体分布发生变化。

We have successfully used the interactive chemical, dynamical and radiative two- dimensional model of the mid atmosphere (SOCRATES, developed in NCAR) and carried out some incipient simulations to study the chemical, radiative and dynamical transportation processes in the stratosphere Without considering the polar heterogeneous chemistry and sulfate aerosol heterogeneous chemistry, this model can be run for many years and the computating process and results are both robust and steadfast Compared with the satellite observational data, the results are considerably consistent In order to study the impact of the quasi-biennial oscillation (QBO) on the distribution of the stratospheric trace gases, we fulfilled a numerical simulation of QBO forcing and compared with the results simulated without imposing QBO forcing The results show that QBO and the subsequent change of the dynamical transport caused by the QBO′s related secondary circulation result in the variation of the distribution of the trace gases in the stratosphere