IGPP is pleased to invite you to join its Fall 2021 Seminar Series presentation featuring UC Berkeley's William Davis. Dr. Davis' talk, "Stochastic Models of the Geodynamo" will be available via Zoom on MONDAY, October 18, 2021, starting at 12:00pm. Zoom: https://ucsd.zoom.us/j/91418513699?pwd=N1czZldJaUJ0RTVOemFvZDAxRzAzUT09. Password: geodynamo
Date: MONDAY, October 12, 2021
Time: 12:00 pm, Pacific Time
Note: This meeting will be recorded. Please make sure that you are comfortable with this before registering.
Abstract: Why is the geodynamo so complicated? In this talk, I will present recent work on representing time variations of the Earth’s axial magnetic dipole field as a stochastic process. These processes, which comprise both deterministic and random elements, are estimated from a set of numerical geodynamo simulations. I will show how broad features of the stochastic models are linked to internal core processes. These interpretations are applied to the paleomagnetic field, suggesting that reversal rates are very sensitive to variations in the generation of the internal field. A moderate drop in variations would be sufficient to initiate a superchron.