Events

Let’s talk about the Tachocline

Solar activity is a Consequence of Fields and Flows in the Interior and Exterior of the Sun (COFFIES). COFFIES is a NASA Heliophysics DRIVE Science Center working to advance our understanding of how the Sun generates the quasi-cyclic magnetic field that extends throughout the heliosphere. Please join COFFIES DRIVE Science Center researchers online for the second annual series of one-day workshops focused on the Tachocline, Flux Transport & Emergence (FT&E), and the Near-Surface Shear Layer (NSSL).

The Tachocline at the base of the solar convection zone is an unexpectedly thin layer of rotational shear that is the likely home of the solar dynamo. Two sessions address topics related to the measurement, formation, and dynamics of the tachocline. A third looks at its relationship to dynamo modeling.e is the thin layer of rotational shear at the bottom of the convection zone that potentially holds the key to understanding the solar dynamo process. Yet, the dynamical origin of the tachocline as well as its role in the generation, storage and transport of magnetic fields are still under debate. We plan to review state of the art observations, theoretical, and numerical models describing and explaining the properties of the tachocline.

COFFIES Community Workshop - Tachocline
Agenda

Time (PT)	Topic
08:45	OVERVIEW Welcome Nic Brummell (UCSC) & Gustavo Guerrero (UFMG, Brasil)
09:00	Invited Talk Tachocline Confinement by Non-Axisymmetric Dynamo Magnetic Fields Loren Matilsky (UCSC)
09:45	Invited Talk Shear-driven instabilities in the presence of strong magnetic fields: a case study of the tachocline Alfio Bonnano (Catania, Italy)
10:30	Discussion Questions and Discussion
10:45	BREAK Coffee Break
11:00	Invited Talk Vertical mixing by shear flows in stars : revisiting Zahn 1992 Pascale Garaud (UCSC)
11:45	Invited Talk Global tachocline dynamics and their implications for shaping solar magnetism Mausumi Dikpati (HAO)
12:30	Discussion Questions and Discussion
12:45	BREAK Lunch
13:45	Invited Talk Alpha-effect at tachocline levels from buoyancy instability Gustavo Guerrero (UFMG, Brasil)
14:15	Invited Talk Exploring the Helioseismic Characteristics of Dynamo Waves within the Solar Zonal Flow, Extending from the Tachocline to the Solar Surface Krishnendu Mandal (NJIT)
14:45	Invited Talk Tayler instability via inertial waves Valentin Skoutnev (Columbia)
15:15	Discussion Questions, Discussion, Last thoughts, Wrap up
15:30	BREAK Adjourn