Multi-Scale Dynamics Studies Using the Drake Antarctic Agile Meteor Radar

使用德雷克南极敏捷流星雷达进行多尺度动力学研究

• 批准号: 1744801
• 负责人: David Fritts
• 金额: $ 18万
• 依托单位: GLOBAL ATMOSPHERIC TECHNOLOGIES AND SCIENCES, INC.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2022-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1744801&HistoricalAwards=false
• 关键词: Multi; Scale; Dynamics; Studies; Using

The Earth's layered atmosphere extends from the surface to the altitudes of about 100 km, consisting of the most lower layer - troposphere, and then extending up through the mesosphere and lower thermosphere, which includes a layer of strongly ionizes air called ionosphere (MLTI). Due to atmospheric perturbations caused by the underlying Earth's landscape of ocean, land, and mountains, the gravity (or internal) waves (GW) are generated with quasi-periodic oscillations most familiar as the wave-like cloud patterns. This project seeks to experimentally investigate the role of atmospheric gravity waves while they propagate up and at distance through the mesosphere to thermosphere, and affect in some way the ionosphere. A well-known major 'hotspot' of gravity waves activity exists over the South America?s Andes, Antarctic Peninsula, and Drake Passage located between these landmasses and connecting the Pacific and Atlantic Oceans. This hotspot is fed by major GW sources in this region that include high mountains, strong jet streams, and the passage of vigorous frontal weather systems. The award will reinstate the Drake Antarctic Agile MEteor Radar (DrAAMER) that was deployed at the Brazilian Antarctic Station Comandante Ferraz in 2010. Upon reinstatement, the radar will be employed in diverse observations along with another meteor radar, SAAMER, deployed in Southern Argentina. These observations will be used for studies of the coupling and dynamics of atmospheric waves generated at lower altitudes over the Drake Passage and then propagating into the mesosphere, lower thermosphere, and ionosphere regions. This research addresses topics that are of high interest and relevance to diverse scientific communities, especially for defining more accurate parameterizations of the MLTI dynamics for the weather prediction and climate modeling.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球的分层大气从表面延伸至约100 km的高度，由最低层 - 对流层组成，然后通过中层和较低的热层延伸，其中包括一层强烈的电离空气，称为电离层（MLTI）。由于大气扰动是由地球，陆地和山脉的地球景观引起的，因此重力（或内部）波（GW）是用准周期性振荡产生的，最熟悉是波浪状的云图案。该项目试图在大气重力波通过中层传播到热层的距离时实验研究，并在某种程度上影响电离层。南美洲的安妮斯，南极半岛和位于这些陆地之间的德雷克通道上存在着众所周知的重力波活动“热点”。该热点是该地区主要的GW来源喂养的，其中包括高山，强烈的喷气流以及剧烈的额叶天气系统的通过。该奖项将在2010年在巴西南极火车站Comandante Ferraz恢复Drake南极敏捷流星雷达（Draamer）。恢复原状后，将在Argentina南部部署的另一个Meteor Radar，Saamer，Saamer，Saamer，在Argentina中部署的雷达。这些观察结果将用于研究在Drake通道上较低高度下产生的大气波的耦合和动力学，然后传播到中层，较低的热层和电离层区域。这项研究介绍了与多样化科学社区具有高度兴趣和相关性的主题，尤其是为了定义MLTI动力学的更准确的参数，以进行天气预测和气候建模。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子和更广泛影响的评估来评估Criteria通过评估的支持。

项目成果

Climatology of quasi-2-day wave structure and variability at middle latitudes in the northern and southern hemispheres

北半球和南半球中纬度准2日波结构和变率的气候学

• DOI: 10.1016/j.jastp.2021.105690
• 发表时间: 2021
• 期刊: Journal of Atmospheric and Solar-Terrestrial Physics
• 影响因子: 1.9
• 作者: Iimura, Hiroyuki;Fritts, David C.;Lieberman, Ruth S.;Janches, Diego;Mitchell, Nicholas J.;Franke, Steven J.;Singer, Werner;Hocking, Wayne K.;Taylor, Michael J.;Moffat-Griffin, Tracy
• 通讯作者: Moffat-Griffin, Tracy