Dynamical Meteorology of the Equatorial Middle Atmosphere

赤道中层大气(15~90 km高度)平均流量的变化主要受准两年和半年振荡(QBO和SAO)的影响。这种振荡表现为赤道纬向风的西风位相，代表了角动量超旋转的条件。这项研究的目的是从理论上探索这些振荡的动力学。QBO是一种平流层现象，每22到34个月不规则地发生一次，而SAO是半年一次的，在中间层和平流层都有成分。中层大气的运动受辐射和光化学过程的影响。邓克顿博士将与来自英国的科学家合作，使用一个完全耦合的二维辐射-动力-光化学模型来进一步研究QBO和SAO。

The variability of the mean flow of the equatorial middle atmosphere (15 to 90 km altitude) is dominated by the quasi- biennial and semi-annual oscillations (the QBO and SAO, respectively). The oscillations are manifested as a westerly phase of the equatorial zonal winds and represent a condition of superrotation in terms of angular momentum. The purpose of this research is to explore, from a theoretical viewpoint, the dynamics of these oscillations. The QBO is a stratospheric phenomenon, occurring irregularly every 22 to 34 months, whereas the SAO is semiannual and has components in both the mesosphere and stratosphere. Atmospheric motion in the middle atmosphere is influenced by radiative and photochemical processes. Dr. Dunkerton, in collaboration with scientists from the United kingdom, will further investigate the QBO and SAO using a fully coupled two- dimensional radiative-dynamical-photochemical model.