Dynamics of the Mesospheres and Lower Thermospheres of the Arctic and Antarctic

PI试图了解北极和南极中间层/低热层(MLT)区域的动态，特别强调起源于较低海拔的过程。他主要研究以下现象的起源和季节行为：(A)纬向波数S=1的12小时振荡，(B)迁徙的日潮，(C)周期为1.5-10天的东传波，以及(D)周期为6-11.5小时的传统振荡。利用全球尺度波动模型和非线性时变谱动力学模型，研究人员确定了这些极地波动现象的可能机制。此外，他还对来自全球卫星的臭氧密度数据进行了分析，这将有助于确定臭氧对太阳辐射的吸收是否具有足够的当地时间和经度变化，以影响在极地中层顶区观测到的半日潮。

The PI seeks to understand the dynamics of the mesosphere/lower thermosphere (MLT) regions of the Arctic and Antarctic, particularly emphasizing processes originating at lower altitudes. Primarily, he focuses on phenomena involving the origins and seasonal behaviors of (a) the 12-hour oscillation with zonal wavenumber s=1, (b) the migrating diurnal tide, (c) eastward-propagating waves with periods between 1.5 and 10 days, and (d) intradiurnal oscillations with periods between 6 and 11.5 hours. Using the Global-Scale Wave Model and nonlinear time-dependent Spectral Dynamics Model, the investigator ascertains likely mechanisms responsible for these polar-region wave phenomena. In addition, he conducts data analysis from global satellites on ozone densities, which will help ascertain whether insolation absorption by ozone possesses sufficient local time and longitudinal variations to affect the semidiurnal tide observed in polar mesopause regions.