Helioseismic Probing with GONG of Subsurface Flows and their Coupling to Magnetic Activity

利用 GONG 进行日震探测地下流及其与磁活动的耦合

• 批准号: 0219581
• 负责人: Bradley Hindman
• 金额: --
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-11-15 至 2007-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0219581&HistoricalAwards=false
• 关键词: Helioseismic; Probing; GONG; Subsurface; Flows

New local-domain helioseismic observations reveal the presence of complex, large-scale, horizontal sub-solar-surface flows. These remarkable weather-like flow patterns, now called Solar Subsurface Weather, are occurring within a zonal shear layer in which the rotational angular velocity increases rapidly with depth. The flows possess intricate patterns that change from one day to the next, accompanied by steady large-scale handed zonal jets and meridional circulation cells. Synoptic maps of this "solar weather" indicate that the Sun's magnetic field modulates flow speeds and directions. This effort will (1) develop an improved ring-diagram analysis technique that will be applied to the GONG+ data to provide continuous real-time coverage of solar weather, (2) use the synoptic solar weather maps to better characterize the magnetic modulation, (3) determine if the modulation can be used to predict and forecast magnetic eruptive activity in the solar atmosphere, and (4) evaluate angular momentum transport within the solar convection zone with the goal of understanding how the Sun maintains its observed differential rotation.

新的局域日震观测揭示了复杂的、大规模的、水平的亚太阳表面流的存在。这些显著的类似天气的气流模式，现在被称为太阳地下天气，发生在一个纬向切变层内，其中旋转角速度随着深度的增加而迅速增加。气流具有复杂的模式，每天都在变化，伴随着稳定的大规模手向纬向喷流和经向环流细胞。这种“太阳天气”的天气图表明，太阳的磁场调节着气流的速度和方向。这项工作将(1)开发一种改进的环图分析技术，将应用于GONG+数据，以提供对太阳天气的连续实时覆盖；(2)使用太阳天气天气图来更好地表征磁调制；(3)确定调制是否可用于预测和预报太阳大气中的磁爆发活动。(4)评估太阳对流区内的角动量传递，目的是了解太阳如何维持观测到的微分旋转。