Dynamic Observations of Solar Magnetic and Velocity Fields

太阳磁场和速度场的动态观测

• 批准号: 0102184
• 负责人: Philip Scherrer
• 金额: $ 39.56万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0102184&HistoricalAwards=false
• 关键词: Dynamic; Observations; Solar; Magnetic; Velocity

The investigators will work to understand the physical nature of large-scale phenomena on the Sun. The main effort is to make long-term observations of large-scale magnetic fields, interpret interrelated phenomena seen on the solar surface, and develop realistic models of the processes acting in the solar interior, corona, and solar wind. Dynamic changes of solar magnetic fields affect the corona, interplanetary space, and finally the terrestrial environment on a vast range of time scales. Short and intermediate time scale magnetic variations drive geomagnetic activity, while longer term changes in the overall level of solar activity seem to be related to irradiance variations, and therefore to climate change. The investigators will continue several specific lines of investigation presently supported by an expiring NSF grant. The main research topics are mechanisms of solar activity on cycle and shorter time scales, magnetic structure and evolution of the solar corona and heliosphere, and prediction of geoeffective solar inputs to the terrestrial environment. These studies are based on analysis of solar magnetic field observations made at the Wilcox Solar Observatory (WSO) and other observatories such as SOHO/MDI, NSO, etc. Coronal fields are estimated by numerical model calculations. The investigators also will continue partial support of SolarMail, and SolarNews. These services are provided to support the general solar physics community. They can be accessed via the web at http://spd.aas.org/.

研究人员将努力了解太阳大规模现象的物理性质。主要工作是对大尺度磁场进行长期观测，解释在太阳表面看到的相互关联的现象，并建立在太阳内部、日冕和太阳风中作用的过程的现实模型。太阳磁场的动态变化影响日冕、行星际空间，最后影响地球环境。短期和中期时间尺度的磁场变化驱动地磁活动，而太阳活动总体水平的长期变化似乎与辐照度变化有关，因此与气候变化有关。调查人员将继续进行几项具体的调查，目前由即将到期的国家科学基金会资助。主要研究方向为周期和短时间尺度的太阳活动机制、日冕和日球层的磁场结构与演化、地球有效太阳输入地球环境的预测等。这些研究是基于威尔考克斯太阳天文台（WSO）和其他天文台（如SOHO/MDI、NSO等）对太阳磁场观测的分析。通过数值模型计算估算日冕场。调查人员还将继续部分支持SolarMail和SolarNews。提供这些服务是为了支持一般的太阳物理社区。他们可以通过网站http://spd.aas.org/访问。