Thermospheric Dynamics Associated with Substorm Surges and the Diffuse Aurora

与亚暴涌和漫射极光相关的热层动力学

• 批准号: 9818497
• 负责人: Helen Parish
• 金额: $ 19.5万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-15 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9818497&HistoricalAwards=false
• 关键词: Thermospheric; Dynamics; Associated; Substorm; Surges

The aims of the planned research are to simulate thermospheric phenomena which occur in response to magnetospheric substorms. In particular, recently observed phenomena within the recovery phase post-midnight diffuse aurora which have not yet been explained will be investigated, as well as the response to expansion phase surges which has not previously been evaluated. Since the processes that occur at high latitudes during substorms may have effects globally, these poorly understood phenomena are important for the thermosphere as a whole. The proposed research will make use of a 3-dimen-sional time-dependent limited area high resolution model, recently developed at UCLA. A much higher resolution will be used than has been used in the past to model shears and instabilities in the auroral zone which should enable them to be simulated successfully for the first time. The UCLA model is non-hydrostatic, time dependent and composition dependent. The CTIM model will be used to provide large scale winds, temperatures and tidal structures as inputs to the UCLA model.

计划研究的目的是模拟响应磁层亚暴而发生的热层现象。特别是，最近观测到的午夜后弥散极光恢复阶段中尚未解释的现象，以及以前未被评估的膨胀阶段激增的响应，将被研究。由于亚暴期间发生在高纬度地区的过程可能对全球产生影响，因此这些尚不为人所知的现象对整个热层很重要。这项提议的研究将利用加州大学洛杉矶分校最近开发的三维时间相关有限区域高分辨率模型。将使用比过去高得多的分辨率来模拟极光区的剪切和不稳定，这将使它们第一次能够成功地模拟。UCLA模型是非流体静力的，依赖于时间和成分。CTIM模型将用于提供大尺度的风、温度和潮汐结构，作为UCLA模型的输入。