Numerical Modeling of Stratospheric Dynamics and Interannual Variability

9301105奥沙利文根据这一奖项，首席研究员将使用两个全球环流模型研究中层大气动力学的各个方面。第一个主题涉及由平流层气流中的惯性不稳定引起的越赤道气流引起的次级环流。更好地定义这些环流对于理解大气成分的垂直扩散是至关重要的。第二项研究将研究惯性重力波的产生和随后对极涡的影响以及进出极涡的传输。结果对于理解涡旋内发生的化学物质很重要，包括臭氧消耗。第三项任务是探讨高纬度平流层臭氧的准两年振荡与年际变化之间的关系。最后，奥沙利文博士将尝试模拟对流层-平流层对大规模局部热带加热的响应，也就是热带西太平洋上发现的深对流。***

9301105 O'Sullivan Under this award the Principal Investigator will investigate various aspects of middle atmospheric dynamics using two global circulation models. The first topic involves the secondary circulations which result from the cross-equatorial flow that results from inertial instabilities in the stratospheric flows. Better definition of these circulations is essential to understand vertical diffusion of atmospheric constituents. The second investigation will be into inertia-gravity wave generation and subsequent effects on the polar vortex and transports in and out of the vortex. Results are important to understanding the chemistry that occurs within the vortex, including ozone depletion. The third task is to explore the relationship between the quasi- biennial oscillation and interannual variability of stratospheric ozone at high latitudes. Finally, Dr. O'Sullivan will attempt to model the tropospheric-stratospheric response to large-scale localized tropical heating, that is, deep convection such as that found over the western tropical Pacific. ***