Millimeter Spectroscopic Studies of the Mesosphere and Lower Thermosphere

中间层和低层热层的毫米波谱研究

• 批准号: 9501288
• 负责人: R. Todd Clancy
• 金额: $ 21万
• 依托单位: SPACE SCIENCE INSTITUTE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1998-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9501288&HistoricalAwards=false
• 关键词: Millimeter; Spectroscopic; Studies; Mesosphere; Lower

This ground-based program of millimeter spectroscopic observations of the upper stratosphere, mesosphere, and lower thermosphere investigates a wide range of photochemical and isotopic processes. Through the previous grant, the PI obtained spectral line observations of this poorly explored atmospheric region point to a number of surprises, including large variations in the D/H ratio of mesospheric water. Most of these millimeter line emissions, however, were weak, and the PI needs long integrations under good observing conditions for sufficiently accurate measurements. Thus, the investigator proposes a three-year program of millimeter spectral line observations at the significantly upgraded Kitt Peak detector configuration. Kitt Peak's improved sensitivity of millimeter spectral line measurements, increased by a factor of four, will enhance these unique constituent measurements of the upper middle atmosphere. Finally, analysis of the resulting data will improve understanding of the mesosphere and attack outstanding problems understanding transport, photochemical and solar cycle processes within the entire middle atmosphere.***

这是一个对平流层上部、中间层和热层下部进行毫米光谱观测的地面项目，研究了广泛的光化学和同位素过程。 通过先前的资助，PI获得了对这一探索不足的大气区域的光谱线观测，发现了一些令人惊讶的结果，包括中间层水的D/H比的巨大变化。 然而，大多数这些毫米线发射都很弱，PI需要在良好的观测条件下进行长时间的积分，以获得足够精确的测量。 因此，研究人员提出了一个为期三年的计划，毫米谱线观测在显着升级的基特峰探测器配置。 Kitt Peak改进了毫米光谱线测量的灵敏度，增加了四倍，将增强中上层大气的这些独特成分测量。 最后，对所得数据的分析将增进对中间层的了解，并解决在了解整个中层大气内的输送、光化学和太阳循环过程方面的突出问题。