Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera

这项建议是继续使用1996年在英国南极站罗塞拉部署的中频（MF，1-30兆赫）中层雷达进行操作和科学研究。该系统现在是68度附近南极MF雷达链的关键站点。S，其中还包括昭和（日本）和戴维斯（澳大利亚）站的中频雷达。该雷达包括正在开发的一套仪器的风部分，用于在罗瑟拉进行中间层-热层研究-这是新的BAS 5年计划的重点，其中还包括铁温度激光雷达（原在南极）和用于重力波研究的中层顶气辉成像仪（原在哈雷）。Rothera MF雷达刚刚对其天线和电子设备进行了升级，以实现更好的信噪比和更连续的高度和时间测量。拟议研究的主要重点是扩大极地中间层动力学的知识。在Rothera的仪器套件是理想的定位相关的半球间研究与北方半球网站在扑克坪，阿拉斯加（65度。N）和挪威ALOMAR（69度）。N）具有可比的仪器。在持续资助下开展的进一步研究工作将侧重于：（1）在Rothera进行多仪器协作研究，以尽可能全面地量化该位置MLT的动态、结构和可变性，（2）多站点（和多仪器）研究南极大规模动态和变化（与戴维斯和Syowa的雷达和其他仪器一起），和（3）使用仪器的半球间研究（例如，Na共振激光雷达和MF雷达）。预计这些研究将导致更详细地了解（1）极地纬度的平均、潮汐和行星波结构，（2）这些结构的季节、年际和短期变化，（3）由不同源和波相互作用条件引起的潮汐和行星波结构的半球差异，（4）两半球重力波的相对影响。这种研究还将更普遍地有助于提高对高纬度过程在全球大气动态和多变性中的作用的认识。

This proposal is to continue operation and scientific studies with the middle-frequency (MF, 1-30 MHz) mesospheric radar deployed at the British Antarctic station Rothera in 1996. This system is now a key site in the Antarctic MF radar chain near 68 deg. S, which includes also MF radars at Syowa (Japan) and Davis (Australia) stations. This radar comprises the winds component of a developing instrument suite for the mesosphere-thermosphere (MLT) studies at Rothera - a focus of the new BAS 5-year plan, which also includes the Fe temperature lidar (formerly at South Pole) and the mesopause airglow imager for gravity wave studies (formerly at Halley). The Rothera MF radar has just had its antennas and electronics upgraded to achieve better signal-to-noise ratio and more continuous measurements in height and time. The main focus of the proposed research is to extend the knowledge of the polar mesosphere dynamics. The instrument suite at Rothera is ideally positioned for correlative interhemispheric studies with northern hemisphere sites at Poker Flat, Alaska (65 deg. N) and ALOMAR, Norway (69 deg. N) having comparable instrumentation. Further research efforts performed with continued funding will focus on: (1) multi-instrument collaborative studies at Rothera to quantify as fully as possible the dynamics, structure, and variability of the MLT at that location, (2) multi-site (and multi-instrument) studies of large-scale dynamics and variability in the Antarctic (together with the radars and other instrumentation at Davis and Syowa), and (3) interhemispheric studies employing instruments (e.g., the Na resonance lidar and MF radar) at Poker Flat and ALOMAR. It is expected that these studies will lead to a more detailed understanding of (1) mean, tidal, and planetary wave structures at polar latitudes, (2) seasonal, inter-annual, and short-term variability of these structures, (3) hemispheric differences in the tidal and planetary wave structures arising from different source and wave interaction conditions, and (4) the relative influences of gravity waves in the two hemispheres. Such studies will also contribute more generally to an increased awareness of the role of high-latitude processes in global atmospheric dynamics and variability.