IGPP Green Scholar Seminar 2021: John Colosi

IGPP is pleased to invite you to join its IGPP Green Scholar Seminar presentation featuring the Naval Postgraduate School and UC Santa Cruz's John Colosi. Dr. Colosi's talk, "Stochastic processes in ocean acoustic sound propagation and beyond: A tutorial on path integral approaches and the physical picture" will be available BOTH in person in the Revelle Conference Room 4301 and Zoom on MONDAY, November 1, 2021, starting at 12:00 p.m. Zoom: https://ucsd.zoom.us/j/97178357730?pwd=MGJtcG5vU2VGdWgvUDhNUCtqTEVTUT09. Password: wave

Date: Monday, November 1, 2021
Time: 12:00 pm, Pacific Time
Location: Zoom AND Revelle Conference Room 4301

Note: This meeting will be recorded. Please make sure that you are comfortable with this before registering.

Abstract: Path integral approaches in ocean acoustics were pioneered by Walter Munk and Fred Zachariasen in the 70’s utilizing perturbation theory appropriate for weak fluctuations.  They were extended to the strong fluctuation regime in the 70’s and 80’s by Roger Dashen and Stan Flatte who adopted the powerful Feynman path integral technique. The path integral picture of wave propagation has provided a defining perspective on ocean acoustical physics for complex and stochastic oceanic media by combining the intuitive ray picture of wave propagation and interference with a geometric approach to critical diffractive effects. More recent notions of ray chaos have forced some re-examination of the underlying assumptions of the path integral approach. Much of this perspective is expected to transcend ocean acoustics and apply more broadly to other disciplines with complex media such as optics, atmospheric sound, hydrodynamic wave propagation, seismology, and astronomy. This talk will be tutorial in nature aimed at graduate students and postdocs, providing an overview of the path integral formalism, its application to stochastic processes in ocean acoustics and remote sensing, and examples from various fields.

About the image: An example of stochastic optical wave propagation: Coherent light wave patterns seen on the seabed due to sunlight propagating through the randomly rough sea surface.

Nov 1 2021 - 12:00pm to 1:00pm