CEDAR Postdoctoral Proposals: An Arecibo/EISCAT Observational Investigation of the Effects of the Meteor Mass Flux on the 80-120 km Atmosphere/Ionosphere

CEDAR 博士后提案：阿雷西博/EISCAT 流星质量通量对 80-120 公里大气层/电离层影响的观测研究

• 批准号: 0004284
• 负责人: John Mathews
• 金额: $ 10万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-01 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0004284&HistoricalAwards=false
• 关键词: CEDAR; Postdoctoral; Proposals; Arecibo; EISCAT

This award is for post-doctoral research on sporadic micrometeor mass influx into the upper atmosphere. The study makes use of data from the Arecibo Radar in Puerto Rico and the European Incoherent Scatter (EISCAT) radar in Norway. The micrometeor velocities will be deduced from Doppler measurements made by the radars. The comparison between the Arecibo and EISCAT results will reveal summer and winter differences at the two locations. The differential in flux may play a major role in the formation of noctilucent clouds and related summer upper atmosphere phenomena that may be harbingers of global change. Meteoroid destruction mechanisms and deposition of meteoric mass will also be investigated. This is critical to elucidating the origins of metal layers above the meteor zone and the observed low atmospheric abundance of calcium relative to that expected from meteorite composition.

该奖项是对零星微流星大量涌入高层大气的博士后研究。该研究利用了波多黎各的阿雷西博雷达和挪威的欧洲非相干散射(EISCAT)雷达的数据。微流星的速度将从雷达进行的多普勒测量中推断出来。阿雷西博和EISCAT结果的比较将揭示这两个地点夏季和冬季的差异。通量的差异可能在夜光云和相关的夏季高层大气现象的形成中发挥重要作用，这些现象可能是全球变化的先兆。还将研究流星体的破坏机制和流星体的沉积。这对于阐明流星带上方金属层的来源以及观测到的大气中钙的丰度相对于陨石成分的预期来说是至关重要的。