Yeo Kok Leng, Solanki Sami K, Norris Charlotte M, Beeck Benjamin, Unruh Yvonne C, Krivova Natalie A
Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany.
Blackett Laboratory, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom.
Phys Rev Lett. 2017 Sep 1;119(9):091102. doi: 10.1103/PhysRevLett.119.091102.
The variation in the radiative output of the Sun, described in terms of solar irradiance, is important to climatology. A common assumption is that solar irradiance variability is driven by its surface magnetism. Verifying this assumption has, however, been hampered by the fact that models of solar irradiance variability based on solar surface magnetism have to be calibrated to observed variability. Making use of realistic three-dimensional magnetohydrodynamic simulations of the solar atmosphere and state-of-the-art solar magnetograms from the Solar Dynamics Observatory, we present a model of total solar irradiance (TSI) that does not require any such calibration. In doing so, the modeled irradiance variability is entirely independent of the observational record. (The absolute level is calibrated to the TSI record from the Total Irradiance Monitor.) The model replicates 95% of the observed variability between April 2010 and July 2016, leaving little scope for alternative drivers of solar irradiance variability at least over the time scales examined (days to years).
以太阳辐照度来描述的太阳辐射输出变化对气候学而言至关重要。一个常见的假设是太阳辐照度变化是由其表面磁场驱动的。然而，基于太阳表面磁场的太阳辐照度变化模型必须根据观测到的变化进行校准，这一事实阻碍了对该假设的验证。利用太阳大气的真实三维磁流体动力学模拟以及来自太阳动力学天文台的最先进太阳磁图，我们提出了一个无需任何此类校准的总太阳辐照度（TSI）模型。在此过程中，模拟的辐照度变化完全独立于观测记录。（绝对水平根据总辐照度监测仪的TSI记录进行校准。）该模型再现了2010年4月至2016年7月间95%的观测到的变化，至少在所研究的时间尺度（从数天到数年）内，几乎没有其他因素可作为太阳辐照度变化的驱动因素。
