Acquisition and Analysis of Gravity Wave Image Data for Investigating Antarctic Mesospheric Dynamics

这项提议是为了进行数据采集和深入数据分析，利用南极洲两个关键地点的现有和新的测量结果，调查高纬度地区短周期（1小时）中层重力波的气候学，并研究其传播和最丰富的来源。该计划是由NSF极地项目办公室和英国联合资助的试点研究的后续项目。英国南极调查局，调查南极洲重力波成像的潜力。犹他州州立大学研制了一台全天空多波长CCD成像仪，并于1999年12月在南极洲哈雷站（76 S）安装，2000年3月开始进行自动测量。USU/BAS成像仪在过去三个澳大利亚冬季（4月至9月）运行非常成功，首次提供了南极大陆小规模重力波形态和动力学的长期（~5个月/季节）图像测量。2002年，相机被重新安置在南极半岛的罗瑟拉站（67 S），准备使用一套专门的仪器进行新的协调测量，包括铁温度激光雷达、Bomem OH干涉仪和MF雷达，用于同时测量风。在这两个站点的测量提供了高纬度重力波活动和源的不同样本，使地形强迫和长距离管道波传播的调查。哈雷站位于广阔的布伦特冰架上，与中纬度地区普遍存在的局部对流源相距甚远，距离南极山脉数千公里，这与罗塞拉站形成了鲜明的对比，罗塞拉站位于一个潜在的“刀刃”波浪发生器上，这是由冬季极涡强风吹过海拔高达2公里的近乎垂直的半岛悬崖造成的。作为我们与BAS正在进行的合作计划的一部分，全天空相机的操作和维护由BAS负责。在这个建议中，要求支持继续这一令人兴奋的合作测量，支持研究生进行数据分析。

This proposal is for data acquisition and in-depth data analysis that will utilize existing and new measurements from two key sites in Antarctica to investigate the climatology of short-period (1 hour) mesospheric gravity waves at high-latitudes and to study their propagation and most copious sources. The proposed program is a follow on to a pilot research, jointly funded by the NSF Office of Polar Programs and the U.K. British Antarctic Survey, to investigate the potential of imaging gravity waves from Antarctica. An all-sky multi-wavelength CCD imager was developed at Utah State University and deployed at Halley Station, Antarctica (76 S) in December 1999 and automatic measurements were initiated in March 2000. The USU/BAS imager has operated very successfully for the past three Austral winters (April-September) providing the first long-term (~5 month/season) image measurement of small-scale gravity wave morphology and dynamics over the Antarctic continent. In 2002, the camera was relocated to Rothera Station (67 S) on the Antarctic Peninsula in preparation for new coordinated measurements using a suite of specialized instrumentation including an Fe temperature lidar, a Bomem OH Interferometer and an MF radar for simultaneous wind measurements. Measurements at these two sites provide a diverse sample of high-latitude gravity wave activity and sources, enabling the investigation of orographic forcing and long-distance ducted wave propagation. The isolated location of Halley on the vast Brunt Ice Shelf greatly removed from localized convective sources that prevail at mid-latitudes and several thousand kilometers from the Antarctic Mountain Range contrasts markedly with Rothera Station which is located on a potential "knife edge" wave generator caused by strong winter polar vortex winds blowing over the near-vertical peninsula cliffs rising as high as 2 km above sea level. As part of our ongoing collaborative program with BAS the operation and maintenance of the all-sky camera is covered by BAS. In this proposal support is requested to continue this exciting collaborative measurements supporting a graduate student for the data analysis.