EAGER: Exploration of the Source of Polar Mesospheric Summer Echoes at 33 cm Observed with the Poker Flat Incoherent Scatter Radar

EAGER：利用扑克平非相干散射雷达观测到的 33 厘米处极地中层夏季回声的来源探索

• 批准号: 0907941
• 负责人: Marlene Rosenberg
• 金额: $ 5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907941&HistoricalAwards=false
• 关键词: EAGER; Exploration; Source; Polar; Mesospheric

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The investigator will utilize an integrated modeling approach to improve our understanding of Polar Mesosphere summer echoes (PMSE) from the cold summer Mesopause region, at altitudes between about 80-95 km at high polar latitudes.The interest in improving the modeling effort for PMSE has stemmed from recent spectral observations of PMSE, which have been made by the NSF funded Poker Flat Incoherent Scatter Radar (PFISR). The physical characterization of high frequency PMSE is still poorly understood, and more work is required to develop turbulence scattering theories, to help explain the radar observations. The key modeling work relates to dust charging, and how significant it needs to be, as well as the role of turbulence scattering in PMSE formation and evolution. It is also possible that other processes are controlling PMSE, including dusty plasma wave instabilities, which represents a novel approach having received little attention to date from the modeling community.The investigator is involving young undergraduate students, who will participate in the data analysis as well as receive a valuable learning experience. The intellectual merit of this EAGER proposal relates to the exploration of new ideas on dust charging in the Mesopause, and novel, potentially transformative ideas involving dusty plasma instabilities to explain higher frequency PMSE. The required modeling effort is complex and multi-faceted, and thus carries high risk, but also with a high return, in terms of improved scientific understanding of PMSE, which have been considered an important new marker for atmospheric change.

该奖项是根据2009年的《美国回收与再投资法》资助的（公共法111-5）。调查人员将利用一种综合建模方法来提高我们对寒冷的夏季间室中极地中层夏季回声（PMSE）的理解，来自寒冷的夏季中间地区在高极纬度的大约80-95 km之间。改善PMSE建模工作的兴趣源于最近对PMSE的光谱观察结果，PMSE是由NSF资助的扑克扁平扁平散射雷达（PFISR）进行的。高频PMSE的物理表征仍然很少了解，并且需要更多的工作来发展湍流散射理论，以帮助解释雷达观察。关键的建模工作与灰尘充电有关，以及它需要的重要性以及湍流散射在PMSE形成和进化中的作用。其他过程也有可能控制PMSE，包括尘土飞扬的等离子体波不稳定性，该方法代表了一种新颖的方法，但迄今为止，建模社区几乎没有受到关注。作为获得宝贵的学习经验。这项渴望的建议的智力优点与探索有关中间尘埃充电的新思想以及新颖的，潜在的变革性思想，涉及尘土飞扬的等离子体不稳定性，以解释更高频率PMSE。所需的建模工作是复杂且多方面的，因此在对PMSE的科学理解方面也具有很高的风险，但也具有很高的回报，这被认为是大气变化的重要新标记。