SH011
From the tachocline through the convection zone to the photosphere and into the heliosphere: solar processes responsible for magnetic activity

Session ID#: 160837

Session Description:
Solar activity is the direct Consequence Of Fields and Flows in the Interior and Exterior of the Sun (COFFIES). High-fidelity measurements of flows and fields on the surface and below for multiple cycles from the SDO/HMI, SOHO/MDI and GONG instruments, along with new capabilities in theory, modeling, and analysis, finally allow us to bridge the gaps in observed and inferred measurements, fine-scale models, and global simulations. This is the ideal time for transformative breakthroughs in understanding of solar magnetic activity, which affects our vulnerable technological society, by addressing questions such as: What drives large-scale plasma-flows? How do these flows interact with magnetic fields to create varying solar activity cycles? What causes the large-scale organization of active region emergence pattern? How does solar variability influence conditions in the heliosphere? We welcome contributions from the solar and heliospheric community, and from the coordinated and complementary COFFIES DRIVE Science Center and 2019-LWS-FST#4.
Index Terms:

7524 Magnetic fields [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]
7529 Photosphere [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]
7536 Solar activity cycle [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]
7537 Solar and stellar variability [SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY]

Primary Convener:  Mausumi Dikpati, High Altitude Observatory, Boulder, CO, United States
Convener:  Todd Hoeksema
Student/Early Career Convener:  Shea A. Hess Webber, Stanford University, HEPL, Stanford, CA, United States
 
The Heliospheric Current Sheet and Solar Flares in the Sun (1051848)
Claire Liu, Los Gatos High School, Los Gatos, United States and Junwei Zhao, W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, United States
 
On the Origin of the Photospheric Magnetic Field (1058552)
Peter W Schuck1, Mark Linton2, Kalman Knizhnik3 and James Edward Leake1, (1)NASA Goddard Space Flight Center, Greenbelt, United States, (2)US Naval Research Laboratory, Space Science Division, Washington, DC, United States, (3)Naval Research Lab, Washington DC, DC, United States
 
Investigating Ohmic Heating as a Solar Active Region Atmosphere Heating Mechanism (1058834)
Makayla Frisse, University of Alabama in Huntsville, Physics, Huntsville, United States, Mehmet Sarp Yalim, University of Alabama in Huntsville, Center for Space Plasma and Aeronomic Research, Huntsville, AL, United States, Christian Beck, National Solar Observatory, Makawao, United States, Rohan E Louis, Udaipur Solar Observatory, Physical Research Laboratory, Ahmedabad, India, Debi Prasad Choudhary, California State University Northridge, Department of Physics and Astronomy, Northridge, CA, United States and Avijeet Prasad, University of Oslo, Rosseland Center for Solar Physics, Oslo, Norway
 
Trapping of Thermal Rossby Waves within the Sun's Convection Zone (Invited) (1067013)
Bradley Hindman, University of Colorado Boulder, JILA & Applied Mathematics, Boulder, United States and Rekha Jain, University of Sheffield, Sheffield, United Kingdom
 
The nature of electric currents in the formation and eruption of solar active regions (1069070)
James Edward Leake, NASA Goddard Space Flight Center, Greenbelt, United States, Peter W Schuck, NASA GSFC, Silver Spring, United States, Mark Linton, US Naval Research Laboratory, Space Science Division, Washington, DC, United States and Lars K. S. Daldorff, Catholic University of America, Washington, DC, United States
 
Detection of Giant-Scale Convection in the Near-Surface Shear Layer of the Sun (1077171)
Alexander G Kosovichev, New Jersey Institute of Technology, Center for Computational Heliophysics, Edison, NJ, United States and Alexander Getling, Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
 
Using Time-Distance Helioseismology to Constrain Simulations of Meridional Circulation on the Sun (1082296)
Andrey Stejko, New Jersey Institute of Technology, Center for Computational Heliophysics, Edison, NJ, United States, Alexander G Kosovichev, New Jersey Institute of Technology, Physics, Newark, NJ, United States, Nicholas Andrew Featherstone, Southwest Research Institute Boulder, Boulder, CO, United States, Gustavo Guerrero, UFMG Federal University of Minas Gerais, Belo Horizonte, Brazil, Bradley Hindman, University of Colorado Boulder, JILA & Applied Mathematics, Boulder, United States, Loren Matilsky, University of California Santa Cruz, Department of Applied Mathematics and Statistics, Santa Cruz, United States and Joern Warnecke, Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany
 
Fine Structure of Near-Surface Rotational Shear Layer in 3D Radiative Hydrodynamics Simulations of the Solar Convection Zone (1093866)
Irina Kitiashvili1, Alexander G Kosovichev2, Alan A Wray1, Viacheslav M Sadykov3 and Gustavo Guerrero4, (1)NASA Ames Research Center, Moffett Field, CA, United States, (2)New Jersey Institute of Technology, Physics, Newark, NJ, United States, (3)New Jersey Institute of Technology, Department of Physics, Edison, United States, (4)UFMG Federal University of Minas Gerais, Belo Horizonte, Brazil
 
Horizontal Flows in and around “Rogue” Active Regions (1095521)
Kiran Jain, National Solar Observatory, Boulder, United States, Sushanta C Tripathy, National Solar Observatory, Tucson, AZ, United States and Belur Ravindra, Indian Institute of Astrophysics, Bangalore, India
 
Reconciling Subsurface Flow Measurements from GONG, HMI and MDI (1095632)
Sushanta C Tripathy, National Solar Observatory, Tucson, AZ, United States, Kiran Jain, National Solar Observatory, Boulder, United States and Rudolf Komm, National Solar Observatory, Sunspot, United States
 
Unexpected Phase-Shifts of Acoustic Waves Observed in Real Data as well as in Simulations and Their Impact on Estimations of the Deep Meridional Flow (1097387)
Matthias Waidele1, Junwei Zhao1 and Irina Kitiashvili2, (1)W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, United States, (2)NASA Ames Research Center, Moffett Field, CA, United States
 
Active Region Complexes and Hemispheric Asymmetry Observed by SDO/HMI (1105397)
Lucy Will, University of Hawaii at Manoa, Honolulu, HI, United States, Bryan Komei Yamashiro, University of Hawaii at Manoa, Institute for Astronomy, Honolulu, HI, United States and Xudong Sun, University of Hawaii at Manoa, Institute for Astronomy, Honolulu, United States
 
A Study of Magnetic Active Regions: An Information Theory Approach (1105900)
Simon Wing1, Bishwa Raj Neupane2, Jay Johnson3, Carson O'Ffill4 and Elmer Alberto Ccopa Rivera3, (1)Johns Hopkins University, Baltimore, MD, United States, (2)University of Alaska Fairbanks, Fairbanks, AK, United States, (3)Andrews University, Berrien Springs, MI, United States, (4)Berrien Springs, MI, UNITED STATES
 
Sunspots Detection and Analysis Using Artificial Intelligence and Big Data (1119055)
Caius Selhorst1, Alessandra Abe Pacini2, Jean Carlo Costa Justino Sr.1 and Adriana Valio3, (1)Universidade Cidade de São Paulo, NAT - Núcleo de Astrofísica, São Paulo, Brazil, (2)CU/CIRES - NOAA/NCEI, Boulder, United States, (3)Center for Radio Astronomy and Astrophysics Mackenzie, Mackenzie, Brazil
 
Confining the thermal spread of the tachocline (1120463)
Catherine Blume, University of Colorado at Boulder, JILA & Astrophysical and Planetary Sciences, Boulder, CO, United States, Bradley Hindman, University of Colorado Boulder, JILA & Applied Mathematics, Boulder, United States, Loren Matilsky, University of Colorado Boulder, JILA & Astrophysical and Planetary Sciences, Boulder, United States, Lydia Korre, Applied Mathematics Department, University of Colorado Boulder, Boulder, United States and Nicholas Andrew Featherstone, University of Colorado Boulder, Applied Mathematics, Boulder, United States
 
Morphology, Evolution and Motion of the Sun's High-Latitude Convective Vortices (1121637)
Bradley Hindman, University of Colorado Boulder, JILA & Applied Mathematics, Boulder, United States, Catherine Blume, University of Colorado at Boulder, JILA & Astrophysical and Planetary Sciences, Boulder, CO, United States, Maria Camisassa, University of Colorado Boulder, Applied Mathematics, Boulder, CO, United States, Nicholas Andrew Featherstone, Southwest Research Institute Boulder, Boulder, CO, United States, Rafael Fuentes, University of Colorado Boulder, Applied Mathematics, Boulder, United States, Lydia Korre, University of Colorado Boulder, Boulder, United States and Loren Matilsky, University of Colorado Boulder, JILA & Astrophysical and Planetary Sciences, Boulder, United States
 
Rossby waves in the solar tachocline: nonlinear interactions and instabilities (1125748)
Breno Raphaldini, National Center for Atmospheric Research, High Altitude Observatory, Boulder, United States, Mausumi Dikpati, NCAR, Boulder, CO, United States, Carlos F. M. Raupp, University of Sao Paulo, Atmospheric Science, Sao Paulo, Brazil and Andre Seiji Teruya, Institute of Astronomy, Geophysics and Atmospheric Sciences, Department of Atmospheric Sciences, Sao Paulo, Brazil
 
Open-Source High-Performance Flux Transport (1125962)
James Turtle1, Ronald M. Caplan1, Jon Linker1, Lisa Upton2, Charles Nickolos Arge3, Raphael Attie4, Cooper Downs1, Carl J Henney5 and Nikolai V Pogorelov6, (1)Predictive Science Inc., San Diego, CA, United States, (2)SSRC, Alexandria, VA, United States, (3)NASA Goddard Space Flight Center, Greenbelt, United States, (4)NASA Goddard Space Flight Center, George Mason University, Greenbelt, MD, United States, (5)Air Force Research Laboratory Kirtland AFB, Kirtland AFB, NM, United States, (6)University of Alabama in Huntsville, Department of Space Science, Huntsville, United States
 
Understanding different periodicities of solar activity derived from observations and simulations (1126651)
Valentina V Zharkova, Northumbria University, Newcastle-Upon-Tyne, United Kingdom, Irina Vasilieva, Main Astronomical Observatory, Solar Physics, Kyiv, Ukraine, Simon Shepherd, La Sorbonne Université,, Primal Research Group, Paris, France and Elena Popova, Universidad Bernardo O’Higgins, Centro de Investigación en Astronomía,, Santiago, Chile
 
Evolution of Kinetic and Magnetic Helicities in Solar Active Regions (1133649)
Yang Liu, Stanford University, HEPL, Stanford, CA, United States and Rudolf Komm, National Solar Observatory, Sunspot, United States
 
Systematic Biases in Polar Field Measurement Partially Explain the Open Flux Problem (1137746)
Xudong Sun, University of Hawaii at Manoa, Institute for Astronomy, Honolulu, United States, Ivan Milic, University of Colorado at Boulder, Boulder, CO, United States, Rebeca Centeno Elliott, High Altitude Observatory, Boulder, CO, United States, Milan Gosic, Lockheed Martin Solar & Astrophysics Laboratory, Palo Alto, CA, United States and Bryan Komei Yamashiro, University of Hawaii at Manoa, Institute for Astronomy, Honolulu, HI, United States
 
Properties of Chromospheric Flow Channels Around a Sunspot (1138456)
Debi Prasad Choudhary, California State University Northridge, Department of Physics and Astronomy, Northridge, CA, United States, Christian Beck, National Solar Observatory, Makawao, United States, Avijeet Prasad, University of Oslo, Rosseland Center for Solar Physics, Oslo, Norway, Jack Michael Jenkins, Mullard Space Science Laboratory, Dorking, United Kingdom, Sanjay Gosain, NSO/Tucson, Tucson, AZ, United States, Rohan E Louis, Udaipur Solar Observatory, Physical Research Laboratory, Ahmedabad, India and Qiang Hu, University of Alabama in Huntsville, Department of Space Science, Huntsville, United States
 
Magnetohydrodynamics Instabilities of Double Magnetic Bands in a Shallow-water Tachocline Model (1138704)
Bernadett Belucz, University of Sheffield, Sheffield, United Kingdom, Mausumi Dikpati, NCAR, Boulder, CO, United States and Robertus Erdelyi, University of Sheffield, School of Mathematics and Statistics, Sheffield, United Kingdom
 
Penetration of tachocline Rossby waves through the convection zone to the surface (1149252)
Peter Gilman, University Corporation for Atmospheric Research, Boulder, CO, United States, Mausumi Dikpati, NCAR, Boulder, CO, United States and Scott William McIntosh, High Altitude Observatory, Boulder, CO, United States
 
Characteristics of Asymmetric Coronal Hole Motions over Five Solar Cycles (1153558)
Barbara A Emery1, Sarah E Gibson2, Ian McDonald Hewins3, Thomas A Kuchar4, David F Webb4 and Robert McFadden5, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States, (3)ISR, Boston College at HAO/NCAR, Boulder, CO, United States, (4)Boston College, ISR, Chestnut Hill, MA, United States, (5)High Altitude Observatory, Boulder, CO, United States
 
Effects of grid resolution on the angular momentum transport in global simulations of deep solar convection (1157893)
Gustavo Guerrero, New Jersey Institute of Technology, Edison, NJ, United States, Andrey Stejko, New Jersey Institute of Technology, Center for Computational Heliophysics, Edison, NJ, United States, Alexander G Kosovichev, New Jersey Institute of Technology, Physics, Newark, NJ, United States, Piotr K Smolarkiewicz, National Center for Atmospheric Research, Boulder, United States and Antoine Strugarek, DRF/IRFU/DAp/LDE3 CEA Saclay, Saclay, France
 
Photospheric Doppler Shift Rotation Rates Using Ten Spectral Sampling Pairs in Four Spectral Lines (1160667)
Roger K Ulrich1, Tham V Tran2 and John E. Boyden2, (1)American Astronomical Society, Chevy Chase, MD, United States, (2)University of California at Los Angeles, Physics and Astronomy, Los Angeles, CA, United States
 
A Survey of Off-Limb Eruptions Observed in SDO/HMI Continuum Intensity (1164769)
Jessica Zhao, Homestead High School, Sunnyvale, CA, UNITED STATES and Yang Liu, Stanford University, HEPL, Stanford, CA, United States
 
Angular Momentum Transport and Mean Flows in Stellar Interiors (1165603)
Lydia Korre, University of Colorado Boulder, Boulder, United States and Nicholas Andrew Featherstone, Southwest Research Institute Boulder, Boulder, CO, United States
 
The systematic cross-equator-flow effect in meridional-circulation measurements and its correlation with hemispheric imbalance of magnetic activity (1166300)
Ruizhu Chen, Stanford University, HEPL, Stanford, CA, United States and Junwei Zhao, Stanford University, HEPL, Stanford, United States
 
The Impact of Convective Rossby Number and Density Stratification on Meridional Flow Structure (1166322)
Nicholas Andrew Featherstone, Southwest Research Institute Boulder, Boulder, CO, United States, Catherine Blume, University of Colorado at Boulder, JILA & Astrophysical and Planetary Sciences, Boulder, CO, United States, Maria Camisassa, University of Colorado Boulder, Applied Mathematics, Boulder, CO, United States, Rafael Fuentes, University of Colorado Boulder, Applied Mathematics, Boulder, United States, Bradley Hindman, University of Colorado Boulder, JILA & Applied Mathematics, Boulder, United States, Lydia Korre, Applied Mathematics Department, University of Colorado Boulder, Boulder, United States and Loren Matilsky, University of Colorado Boulder, JILA & Astrophysical and Planetary Sciences, Boulder, United States
 
What Drives the Solar Cycle? Science Strategy for the COFFIES DRIVE Science Center (1169629)
J Todd Hoeksema, Stanford University, Stanford, CA, United States and The COFFIES Baristas
 
Deep Learning to Infer Boundary Conditions for Models of the Solar Photosphere and Atmosphere (1170699)
Benoit Tremblay, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, Maria Kazachenko, University of California Berkeley, Berkeley, CA, United States, Robert Jarolim, University of Graz, Graz, Austria, Matthias Rempel, National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States and Anna V Malanushenko, LMSAL, Palo Alto, CA, United States
 
Cross-Calibration of Magnetic Field Measurements of Solar Active Regions (1174376)
Logan White, North Carolina State University Raleigh, Raleigh, NC, United States, Viacheslav M Sadykov, Georgia State University, Physics and Astronomy, Atlanta, GA, United States, Dustin Kempton, Georgia State University, Atlanta, GA, United States and Piyush Dahiya, Georgia State University, Atlanta, United States
 
Sources of Open Magnetic Flux in Solar Polar Regions (1178476)
Bryan Komei Yamashiro and Xudong Sun, University of Hawaii at Manoa, Institute for Astronomy, Honolulu, United States
 
Migration of Low Latitude Long Lived Coronal Holes in the McA: An Analysis of Rossby Waves Based on Coronal Hole Drift Speeds (1182286)
Jacob Harris1, Mausumi Dikpati2, Ian McDonald Hewins3, Sarah E Gibson4, Scott William McIntosh1, Subhamoy Chatterjee5 and Thomas A Kuchar6, (1)High Altitude Observatory, Boulder, CO, United States, (2)NCAR, Boulder, CO, United States, (3)ISR, Boston College at HAO/NCAR, Boulder, CO, United States, (4)National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States, (5)Southwest Research Institute, Boulder, CO, United States, (6)Boston College, ISR, Chestnut Hill, MA, United States
 
Observations and Simulations of Solar Flows and Their Roles in Magnetic Activity Patterns at the Surface (1183515)
Mausumi Dikpati, High Altitude Observatory, Boulder, CO, United States, Douglas C Braun, NorthWest Research Associates Boulder, Boulder, CO, United States, Nicholas Andrew Featherstone, University of Colorado Boulder, Applied Mathematics, Boulder, United States, Bradley Hindman, University of Colorado Boulder, JILA & Applied Mathematics, Boulder, United States, Rudolf Komm, National Solar Observatory, Sunspot, United States, Yang Liu, Stanford University, HEPL, Stanford, CA, United States, Lisa Upton, SSRC, Alexandria, VA, United States and Haimin Wang, New Jersey Institute of Technology, Center for Solar-Terrestrial Research, Newark, United States
 
Quantifying Uncertainties in Time-Distance Far-Side Helioseismology AR Detections (1187007)
Alyssa Russell, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Shea A. Hess Webber, Stanford University, HEPL, Stanford, CA, United States and Lisa Upton, SSRC, Alexandria, VA, United States
 
REMOVAL OF ACTIVE REGION INFLOWS REVEALS A WEAK GLOBAL TREND IN NEAR-SURFACE MERIDIONAL FLOW (Invited) (1190640)
Sushant Mahajan1, Xudong Sun2 and Junwei Zhao1, (1)W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, United States, (2)University of Hawaii at Manoa, Institute for Astronomy, Honolulu, United States
 
The Sun’s Global Flows: Differential Rotation (1193585)
Sushant Mahajan1, Lisa Upton2, H. M. Antia3, Sarbani Basu4, Marc L DeRosa5, J Todd Hoeksema6, Kiran Jain7, Rudolf Komm8, Alexei A Pevtsov7, Thierry Roudier9, Sushanta C Tripathy10, Roger K Ulrich11, Shea A. Hess Webber6 and Junwei Zhao1, (1)W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, United States, (2)Southwest Research Institute Boulder, Boulder, CO, United States, (3)Centre for Excellence in Basic Science, Mumbai, India, (4)Yale University, New Haven, CT, United States, (5)Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA, United States, (6)Stanford University, HEPL, Stanford, CA, United States, (7)National Solar Observatory, Boulder, United States, (8)National Solar Observatory, Sunspot, United States, (9)IRAP, Toulouse, France, (10)National Solar Observatory, Tucson, AZ, United States, (11)UCLA, Los Angeles, CA, United States
 
Large-Scale Dynamo with Stable Stratification: the Magnetic Shear-Current Effect (1202466)
Amitava Bhattacharjee, Princeton University, Princeton Plasma Physics Laboratory, Princeton, NJ, United States, Valentin Skoutnev, Princeton University, Princeton, NJ, United States and Jonathan Squire, University of Otago, Dunedin, New Zealand
 
Helioseismic Time-Distance Techniques for Detecting Subsurface Magnetic Fields (1202672)
John T Stefan, New Jersey Institute of Technology, Edison, NJ, United States and Alexander G Kosovichev, New Jersey Institute of Technology, Physics, Newark, NJ, United States
 
Optimal low-dimensional representation of solar tachocline dynamics (1203028)
Moritz Linkmann, University of Edinburgh, School of Mathematics, Edinburgh, EH9, United Kingdom and Mausumi Dikpati, NCAR, Boulder, CO, United States
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