Reduction and Analysis of the Mt. Wilson Observations of Solar Magnetic Plages 1915-1985

要更好地了解太阳活动周期及其对太阳输出的影响，首先需要更多关于其过去行为的信息。这笔赠款用于完成RISE(太阳对地球的辐射输入)计划的一个方面，将1915年至1985年期间每天在Mt.威尔逊。这些图像提供了迄今为止最长的太阳色球斑块记录。我们还计划分析这些结构在过去7个太阳周期中在活动区和网络中的行为，以获得关于太阳UV、EUV和总辐照度变化的信息。光斑面积、空间分布和亮度的行为也将提供有关太阳磁场和活动水平的信息，这是对太阳黑子指数获得的数据的补充，也是从其他更短的数据库(如磁图)获得的信息。这笔赠款的数据将向科学界提供。该项目的结果应引起高层大气物理学家、气候学家以及改进对太阳活动周期的预测和动态了解的持续努力的极大兴趣。

Improved understanding of the solar activity cycle and of its effects upon solar outputs requires, first and foremost, more information on its past behavior. This grant is for the completion of one aspect of the RISE (Radiative Inputs of the Sun to Earth) program, to digitize and reduce the CaK spectroheliograms obtained on a daily basis between 1915 and 1985 at Mt. Wilson. These images provide by far the longest record of solar chromospheric plages. We also plan to analyze the behavior of these structures in active regions and in the network over the past 7 solar cycles, for information on variations of solar UV, EUV and total irradiances. The behavior of facular area, spatial distribution, and brightness will also provide information on the sun's magnetic fields and activity levels that is complementary to data obtained by the sunspot index, and from other much shorter data bases such as magnetograms. The data from this grant will be made available to the scientific community. The results of this project should be of considerable interest to the upper atmospheric physicists, climatologists and in ongoing efforts to improve prediction and dynamical understanding of solar activity cycles.