SH43D:
Empirical and Physics-Based Approaches for Predicting Solar Wind Speed eLightning


Submit an Abstract to this Session


Session ID#: 50545

Session Description:
State-of-the-art space weather prediction relies on empirical tools like the Wang/Sheeley (WS) relationship between the coronal magnetic flux expansion and observed solar wind speed, and on additional parameters such as the angular distance of the inferred footpoint to the nearest coronal hole.  There are also physics-based models that attempt to explain the connections between coronal magnetic topology and solar-wind acceleration.  However, there is still much unknown about why these relationships sometimes fail (e.g., for pseudostreamers). This session focuses on a reevaluation of successes and failures of existing methods of solar wind-speed prediction.  We welcome contributions addressing issues discussed above, and questions such as: Is the WS relationship causal?  Are there other observables that outperform existing empirical tools?  What role does magnetic topology play in determining wind speed from regions of non-steady field (e.g., coronal-hole boundaries)? Contributions presenting new observational data, or new results from theory/simulations, are particularly welcome.
Primary Convener:  Bala Poduval, Space Science Institute Boulder, Boulder, CO, United States
Conveners:  Steven R Cranmer, University of Colorado, Boulder, CO, United States and Charles Nickolos Arge, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Primary Liaison:  Bala Poduval, Space Science Institute, Boulder, CO, United States
Chairs:  Bala Poduval, Space Science Institute, Boulder, CO, United States and Charles Nickolos Arge, NASA Goddard Space Flight Center, Greenbelt, MD, United States
OSPA Liaison:  Steven R Cranmer, University of Colorado, Boulder, CO, United States
Index Terms:

7509 Corona [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]
7511 Coronal holes [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]
7524 Magnetic fields [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]
7924 Forecasting [SPACE WEATHER]

Abstracts Submitted to this Session:

Predicting the Ambient Solar Wind Speed using the Wang & Sheeley Empirical Relationship (345287)
Bala Poduval, Space Science Institute Boulder, Boulder, CO, United States
The S-Web as the Source of Slow Solar Wind (Invited) (345481)
Aleida Katherine Higginson, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, Spiro K Antiochos, NASA GSFC, Greenbelt, United States, C Richard DeVore, NASA Goddard Space Flight Center, Greenbelt, MD, United States and Roger Scott, University of Dundee, Dundee, United Kingdom
Global Solar Magnetic Maps using Reverse Active Region Modeling (361142)
Carl J Henney1, Kathleen Shurkin1 and Charles Nickolos Arge2, (1)Air Force Research Laboratory, Albuquerque, NM, United States, (2)NASA Goddard Space Flight Center, Greenbelt, MD, United States
Comparing WSA coronal and solar wind model predictions driven by ADAPT reverse active region maps (378884)
Charles Nickolos Arge, NASA Goddard Space Flight Center, Heliophysics Science Division, Greenbelt, MD, United States, Carl J Henney, Air Force Research Laboratory Albuquerque, Albuquerque, NM, United States, Kathleen Shurkin, Air Force Reseach Laboratory, RVBX, Albuquerque, NM, NM, United States and Samantha Wallace, University of New Mexico, Physics and Astronomy, Albuquerque, NM, United States
Does the Magnetic Expansion Factor Play a Role in Solar Wind Acceleration? (458942)
Samantha Wallace1,2, Charles Nickolos Arge3 and Ylva Pihlstrom2, (1)NASA Postdoctoral Program / GSFC, Greenbelt, United States, (2)University of New Mexico Main Campus, Albuquerque, NM, United States, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States

See more of: SPA-Solar and Heliospheric Physics