Highly Periodic Solar Wind Density Structures: Characteristics and Magnetosphere Coupling

高周期性太阳风密度结构：特征和磁层耦合

• 批准号: 0904344
• 负责人: Joachim Raeder
• 金额: --
• 依托单位: University of New Hampshire
• 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: 2008-01-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0904344&HistoricalAwards=false
• 关键词: Highly; Periodic; Solar; Wind; Density

The PI proposes a thorough, five-part investigation of solar wind periodic structures. He plans to (1) determine the occurrence frequency of the periodic structures, and determine where in the overall heliospheric structure they are observed; (2) explore the possibility that the structures occur preferentially at certain scale-sizes, as opposed to discrete frequencies, and analyze the spatial structure of these convected structures relative to current sheets, shocks, stream interfaces, etc.; (3) study the magnetospheric response to external, periodic forcing using a combination of event studies and MHD simulations, with a primary goal the determination of the dayside magnetopause Q value; (4) examine the pressure balance of the periodic density structures to determine over which timescales they are stable, and use multi-point measurements from L1 and just upstream of the Earth to explore the evolution of such structures; and (5) explore the structure and evolution of periodic density structures that are observed in the downstream regions of shocks and discontinuities.

PI提出了一个彻底的，由五部分组成的太阳风周期性结构的调查。他计划（1）确定周期性结构的出现频率，并确定在整个日光层结构中观察到它们的位置;（2）探索结构优先出现在某些尺度大小的可能性，而不是离散频率，并分析这些对流结构相对于电流片，冲击，流界面等的空间结构; (3)利用事件研究和MHD模拟相结合的方法，研究磁层对外部周期性强迫的响应，主要目标是确定昼侧磁层顶Q值;（4）检查周期性密度结构的压力平衡，以确定它们在哪些时间尺度上是稳定的，并利用L1和地球上游的多点测量来探索这种结构的演变;（5）探索在激波和间断下游区域观察到的周期性密度结构的结构和演化。