Resonance Properties of the Ross Ice Shelf, Antarctica, as a Factor in Regional Wave Interaction between Ocean and Atmosphere

最近的理论和实验研究表明，在高度范围很广的情况下，在几分钟到几小时的时间内，在高层大气/热层观察到的波活动的很大一部分是由于海洋中产生的亚重力波辐射的重力声波造成的。研究南极洲上空令人印象深刻的重力波活动是该项目的目标，在那里，罗斯冰架的接近使其非常特殊。海洋的亚重力波可以激发罗斯冰架的共振频率的基本模式和低阶振荡，从而在整个大气中产生驻波结构。这种效应很可能是最近在麦克默多使用激光雷达观测发现的。该项目将支持一名研究生的培训和教育，使科学家能够研究南大洋（通过罗斯冰架）与高层大气/热层的波耦合。 这项研究将涉及对耦合现象进行理论评估，并将理论与部署在罗斯冰架地区的独特仪器组合收集的数据进行比较：由国家科学基金会支持的罗斯冰架地震仪和微气压计网络、麦克默多附近的次声站和最近安装在韩国南极站Jang Bogo的Dynasonde。

Recent theoretical and experimental studies indicated that over a wide range of altitudes and for periods from a few minutes to several hours a significant portion of the waves activity observed in the upper atmosphere/thermosphere is due to acoustic gravity waves radiated by infragravity waves generated in the ocean. Studying this impressive gravity wave activity over the Antarctic, where proximity of the Ross Ice Shelf makes it very special, is the goal of this project. The ocean's infragravity waves can excite the fundamental mode and low-order oscillations of the Ross Ice Shelf at its resonance frequencies, thus creating standing wave structures throughout the entire atmosphere. It is likely that this effect was recently detected using LIDAR observations at McMurdo. This project will support the training and education of a graduate student.This award will allow scientists to study the wave coupling of the Southern Ocean (via the Ross Ice Shelf) to the upper atmosphere/thermosphere. This study will involve theoretical assessment of the coupling phenomena and comparing theory with data collected by a unique combination of instruments deployed in the Ross Ice Shelf area: the NSF-supported network of seismographs and microbarometers on the Ross Ice Shelf, the infrasound station near McMurdo, and the Dynasonde recently installed at the Korean Antarctic Station Jang Bogo.