Tag Archives: dynamo
169. The QBO-type signals in the Subsurface flow fields during solar cycles 23 and 24
168. Introducing the SPEAR Catalogue from HMI Data
In order to make the properties of magnetic features observed by SDO/HMI more accessible, the Solar Photospheric Ephemeral and Active Region (SPEAR) catalogue has been created as an easy-to-read tabulated text file. Tilt angles from the SPEAR catalogue are shown as a histogram (top) and as a function of latitude (bottom) with colors indicating all regions (blue), regions with anti-Joy (red), and anti-Hale (purple) tilts. Over 40% of regions disobey the laws of Joy and Hale.
159. Magnetic Field Dependence of Bipolar Magnetic Region Tilts on the Sun: Indication of Tilt Quenching
146. Prediction of Solar Cycle 25
128. Evolution of Magnetic Helicity in Solar Cycle 24
118. Detection of Dynamo Waves inside the Sun
112. A possible explanation of the double peaks in solar cycles
109. How Many Active Regions Are Necessary to Predict the Solar Dipole Moment?
To assess the impact of active regions to the axial dipole moment, the authors isolate the contribution of individual regions for Cycles 21, 22, and 23 using a surface flux transport model, and find that although the top ~10% of contributors tend to define sudden large variations in the dipole moment, the cumulative contribution of many weaker regions cannot be ignored.