Solar Irradiance Variation under RISE

PI将建立在以前工作的基础上，提高对光球磁活动在确定太阳辐照度变化中的作用的理解。主要目标是：(1)利用1915年至1985年期间获取的威尔逊山每日光谱图制作的数字全盘CAK图像，改进总辐射强度变化的经验模型；(2)利用这些数字CAK数据制作第一个可追溯到1915年的太阳长期光谱辐照度变化经验模型；(3)扩大威尔逊山数据的数字化，使其包括1905年至1915年期间获得的不同格式的盘片；(4)扩展先前对太阳活动最频繁时斑块和黑子行为的研究。

The PI will build on previous work improving the understanding of the role of photospheric magnetic activity in determining solar irradiance variation. The main objectives are: (1) improving empirical models of variations in total irradiance using the digital, full-disc CaK images produced from the Mount Wilson daily spectroheliograms obtained between 1915 and 1985; (2) using these digital CaK data to produce the first empirical models of long-term solar spectral irradiance variations in the ultraviolet and extreme ultraviolet, extending back to 1915; (3) extending digitization of the Mount Wilson data to include plates of different format obtained between 1905 and 1915; and (4) extending previous study of the behavior of plages and spots at times of highest solar activity.