BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Topological Origin of Certain Fluid and Plasma Waves - Brad Marsto
 n\, Brown University\, USA
DTSTART:20211001T150000Z
DTEND:20211001T160000Z
UID:TALK162703@talks.cam.ac.uk
CONTACT:Prof. Jerome Neufeld
DESCRIPTION:Symmetries and topology play central roles in our understandin
 g of physical systems. Topology\, for instance\, explains the precise quan
 tization of the Hall effect and the protection of surface states in topolo
 gical insulators against scattering from disorder or bumps. However discre
 te symmetries and topology have so far played little role in thinking abou
 t the fluid dynamics of oceans and atmospheres. In this talk I show that\,
  as a consequence of the rotation of the Earth that breaks time reversal s
 ymmetry\, equatorially trapped Kelvin and Yanai waves emerge as topologica
 lly protected edge modes. The non-trivial structure of the bulk Poincaré 
 waves encoded through the first Chern number of value 2 guarantees the exi
 stence of these waves. Thus the oceans and atmosphere of Earth naturally s
 hare basic physics with topological insulators. As equatorially trapped Ke
 lvin waves in the Pacific ocean are an important component of El Niño Sou
 thern Oscillation and other climate oscillations\, these new results demon
 strate that topology plays a surprising role in Earth’s climate system. 
 We also predict that waves of topological origin will arise in magnetized 
 plasmas. A planned experiment at UCLA’s Basic Plasma Science Facility to
  look for the waves is described.\n\nwebinar link: www.cambridge.org/core/
 journals/journal-of-fluid-mechanics/fluid-mechanics-webinar-series
LOCATION:Fluid Mechanics Webinar Series
END:VEVENT
END:VCALENDAR