Advancing our Understanding of Active Region Evolution and Surface Flux Transport Using Far Side Imaging from STEREO 304
Abstract
The STEREO mission, combined with SDO, provides a unique opportunity to view the solar surface continuously. These continuous observations provide the first opportunity to track the long-term evolution of Active Regions over multiple rotations. We present recent results in which we illustrate how He 304 Å images can be used as a proxies for magnetic flux measurements. We will present the long-term evolution of select isolated Active Regions as seen in He 304 Å. These data are then used to validate the far-side evolution of individual active regions produced with our Advective Flux Transport model - AFT. The AFT model is a state of the art Surface Flux Transport model, which simulates the observed near-surface flows (including an evolving convective flow velocity field) to model the transport of magnetic flux over the entire Sun. Finally, we will show that when new flux emergence occurs on the far-side of the Sun, 304 Å images can provide sufficient information about the active region to predict its evolution. These far-side Active Regions have a substantial impact on the coronal and interplanetary field configuration used for space weather predictions.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMSH42B..02U
- Keywords:
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- 7599 General or miscellaneous;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMYDE: 7899 General or miscellaneous;
- SPACE PLASMA PHYSICSDE: 7999 General or miscellaneous;
- SPACE WEATHER