GEM: Diffuse Aurora Model with Optimal Parameterization

GEM：具有最佳参数化的漫射极光模型

• 批准号: 0802708
• 负责人: Patrick Newell
• 金额: $ 30万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-05-01 至 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0802708&HistoricalAwards=false
• 关键词: GEM; Diffuse; Aurora; Model; Optimal

This project will construct an empirical model of the diffuse aurora using data from the DMSP satellites. By utilizing the DMSP data it is possible to clearly differentiate the diffuse aurora and discrete aurora. This can be done in an automated fashion, allowing the complete DMSP particle precipitation database to be used. The DMSP data will also allow separate models of the southern and northern hemispheres to be constructed and to examine the nature of the diffuse aurora both under solar illumination and in darkness. The coupling function developed under previous NSF support will be utilized as an optimal parameter for describing the coupling between the solar wind interplanetary magnetic field and the magnetosphere. An additional coupling function will estimate the viscous coupling term that does not depend on the interplanetary magnetic field. The resulting model is expected to account for better than 2/3 of the variance in the data. Among the open scientific questions that this project will address is the role of UV insolation on diffuse auroral particle precipitation. The resulting models will be distributed to the public through a web site.

该项目将利用DMSP卫星的数据建立漫射极光的经验模型。通过利用DMSP数据，可以清楚地区分弥漫极光和离散极光。这可以以自动化的方式完成，从而允许使用完整的DMSP颗粒沉淀数据库。DMSP数据还将允许建立南半球和北半球的单独模型，并检查在太阳照明和黑暗条件下漫射极光的性质。在以前的NSF支持下开发的耦合函数将被用作描述太阳风、行星际磁场和磁层之间的耦合的最佳参数。一个附加的耦合函数将估算不依赖于行星际磁场的粘性耦合项。由此产生的模型预计将更好地解释数据中三分之二的方差。该项目将解决的公开科学问题之一是紫外线照射对漫射极光粒子降水的作用。由此产生的模型将通过一个网站向公众分发。