Source of a Prominent Poleward Surge During Solar Cycle 24
arXiv:1502.04854 · doi:10.1007/s11207-015-0660-9
Abstract
As an observational case study, we consider the origin of a prominent poleward surge of leading polarity, visible in the magnetic butterfly diagram during Solar Cycle 24. A new technique is developed for assimilating individual regions of strong magnetic flux into a surface flux transport model. By isolating the contribution of each of these regions, the model shows the surge to originate primarily in a single high-latitude activity group consisting of a bipolar active region present in Carrington Rotations 2104-05 (November 2010-January 2011) and a multipolar active region in Rotations 2107-08 (February-April 2011). This group had a strong axial dipole moment opposed to Joy's law. On the other hand, the modelling suggests that the transient influence of this group on the butterfly diagram will not be matched by a large long-term contribution to the polar field, because of its location at high latitude. This is in accordance with previous flux transport models.
15 pages, 8 figures, accepted for publication in Solar Physics
References in corpus (6)
- Solar Cycle Propagation, Memory, and Prediction: Insights from a Century of Magnetic Proxies
- Magnetic Flux Transport at the Solar Surface
- Effects of the scatter in sunspot group tilt angles on the large-scale magnetic field at the solar surface
- Modelling the Global Solar Corona: Filament Chirality Observations and Surface Simulations
- Solar Magnetic Feature Detection and Tracking for Space Weather Monitoring
- Evolution of active and polar photospheric magnetic fields during the rise of Cycle 24 compared to previous cycles
Cited by in corpus (20)
- The Effect of "Rogue" Active Regions on the Solar Cycle
- Improvement of solar cycle prediction: Plateau of solar axial dipole moment
- Physical Models for Solar Cycle Predictions
- How good is the bipolar approximation of active regions for surface flux transport?
- Parameter optimization for surface flux transport models
- Active region contributions to the solar wind over multiple solar cycles
- Activity Complexes and A Prominent Poleward Surge During Solar Cycle 24
- Different contributions to space weather and space climate from different big solar active regions
- A Babcock-Leighton-type Solar Dynamo Operating in the Bulk of the Convection Zone
- Towards a live homogeneous database of solar active regions based on SOHO/MDI and SDO/HMI synoptic magnetograms. I. Automatic detection and calibration
- Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun
- Evolution of the Sun's Polar-fields and the Poleward Transport of Remnant Magnetic Flux
- Sparse reconstruction of electric fields from radial magnetic data
- Rearrangements of Open Magnetic Flux and Formation of Polar Coronal Holes in Cycle 24
- Surface Flux Transport Modeling using Physics Informed Neural Networks
- The nonuniformity of poleward flux transport on the solar surface: a statistical method applied to solar cycles 21-24
- Active regions and the large-scale magnetic field of solar cycle 24
- Ripples and Rush-to-the-Poles in the photospheric magnetic field
- Evolution of the Sun's activity and the poleward transport of remnant magnetic flux in Cycles 21--24
- Low-Latitude Sunspot Group Tilt Angles in 15-24 Activity Cycles