Collaborative Research: CEDAR: Mid-latitude Studies of the Middle Atmosphere Using Rayleigh Scatter Lidar

合作研究：CEDAR：使用瑞利散射激光雷达对中层大气进行中纬度研究

• 批准号: 9202793
• 负责人: John Meriwether
• 金额: $ 4万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202793&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Mid; latitude

A lidar system developed at the University of Maryland is being restored to operation at Utah State University, as part of the Bear Lake Observatory (BLO) facilities - a mid-latitude CEDAR observatory. Lidar observations will be made initially in the altitude range 30-70 km, as done previously at College Park, covering the upper stratosphere and lower mesosphere. The altitude coverage will be extended with the addition of a more powerful laser by Clemson University upward to 80 km. At higher altitudes, near the mesopause, these lidar observations will be complemented by the passive optical instruments at BLO. Vertical profiles of molecular density and temperature will be derived from clear-air portions of the atmosphere above 30 km, using Rayleigh scattering at 532 nm. The downward extension of these profiles into regions were Mie (particulate) scattering significantly adds to the lidar return will employ Raman scattering from atmospheric molecules. These profiles will be used to examine the occurrence, structure, interaction, and variability of planetary waves, tides, and gravity waves in the middle atmosphere above an extended mountainous region. This award provides funds for the PI to help make the system operational at BLO, and begin measurements.

马里兰大学开发的激光雷达系统正在犹他州立大学恢复运行，作为熊湖天文台 (BLO) 设施（中纬度 CEDAR 天文台）的一部分。 激光雷达观测最初将在 30-70 公里的高度范围内进行，就像之前在大学公园市所做的那样，覆盖平流层上层和中间层下层。 克莱姆森大学增加了更强大的激光器，将高度覆盖范围扩大到 80 公里。 在较高海拔、靠近中层顶的地方，这些激光雷达观测将得到 BLO 的无源光学仪器的补充。 分子密度和温度的垂直剖面将使用 532 nm 的瑞利散射从 30 公里以上大气的晴空部分得出。 这些轮廓向下延伸到米氏（颗粒）散射显着增加激光雷达返回的区域将采用来自大气分子的拉曼散射。 这些剖面将用于检查广阔山区上方中层大气中行星波、潮汐和重力波的发生、结构、相互作用和变化。 该奖项为 PI 提供资金，帮助系统在 BLO 运行并开始测量。