Equatorial Dynamical Meteorology

赤道中层大气平均流量的变率以准两年和半年振荡（QBO和SAO）为主。Dunkerton博士将继续研究这些振荡的动力学，强调中层大气非线性平均经向环流理论，它们对SAO和QBO东、西相的影响，以及热带地区局部气溶胶加热的影响(例如，皮纳图博火山等火山爆发引起的环流变化以及QBO与高纬度极涡耦合的机制。本文将研究赤道罗斯比波临界层的稳定性，重点研究赤道惯性不稳定性对来自中纬度的罗斯比波扭曲的非平行基态的作用。还将讨论赤道波在热带对流层中的激发和传播。这项研究不仅对了解中层大气的结构和动力学具有重要意义，而且对了解短期气候变率也具有重要意义。

The variability of the mean-flow of the equatorial middle atmosphere is dominated by the quasi-biennial and semiannual oscillations (QBO and SAO). Dr. Dunkerton will continue his investigation of the dynamics of these oscillations, emphasizing the theory of nonlinear mean meridional circulations in the middle atmosphere, their effect on the east and west phases of SAO and QBO, the effect of localized aerosol heating in the tropics (e.g., the circulation changes which result from volcanic eruptions like Mt. Pinatubo) and mechanisms of coupling the QBO to the high- latitude polar vortex. The stability of equatorial Rossby-wave critical layers will be investigated, focussing on the role of equatorial inertial instabilities on a nonparallel basic state distorted by Rossby waves from midlatitudes. Excitation and propagation of equatorial waves in the tropical troposphere will also be addressed. This research is important not only for basic understanding of the structure and dynamics of the middle atmosphere, but also for understanding short-term climate variability.