BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4//
BEGIN:VEVENT
UID:20250819T011000EDT-1924tNHHoU@132.216.98.100
DTSTAMP:20250819T051000Z
DESCRIPTION:January 12\, 2017\, 3:30 pm\, Burnside Hall 934\n	\n	Dr. Michael 
 Ghil\, Distinguished Research Professor\, Atmospheric & Oceanic Sciences\,
  UCLA\n	\n	Title:  The Wind-Driven Ocean Circulation: Bifurcations\, Simulat
 ions and Observations\n	\n	Abstract:  The large-scale\, near-surface flow of
  the mid-latitude oceans is dominated by the presence of a larger\, anticy
 clonic and a smaller\, cyclonic gyre. The two gyres share the eastward ext
 ension of western boundary currents\, such as the Gulf Stream or Kuroshio\
 , and are induced by the shear in the winds that cross the respective ocea
 n basins. This physical phenomenology is described by a hierarchy of model
 s — quasi-geostrophic\, shallow-water and primitive equations\, with an in
 creasing horizontal resolution and number of vertical levels. We study the
  low-frequency variability (LFV) of this wind-driven\, double-gyre circula
 tion in mid-latitude ocean basins\, subject to time-constant\, purely peri
 odic and more realistic forms of time-dependent wind stress. Both analytic
 al and numerical methods of dynamical systems theory are applied to the mo
 dels of interest. Recent work has focused on the application of non-autono
 mous and random forcing to  double-gyre models. We discuss the associated 
 pullback and random attractors and the non-uniqueness of the invariant mea
 sures that are obtained. The effects of the oceanic LFV on the atmosphere 
 above are explored and compared to observations. Finally\, connections are
  made with the highly topical issues of climate change and climate sensiti
 vity. This talk reflects collaborative work with a large and still increas
 ing number of people.\n\nPlease visit\n\nhttps://dept.atmos.ucla.edu/tcd f
 or their names\, affiliations\, and respective contributions.\n	\n	Reference
 s\n	\n	1. H. A. Dijkstra and M. Ghil\, 2005: Low-frequency variability of th
 e\n	large-scale ocean\n	\n	circulation: A dynamical systems approach\, Rev. G
 eophys.\, 43\, RG3002\,\n	doi:10.1029/2002RG000122.\n	\n	2. M. Ghil\, 2016. T
 he wind-driven ocean circulation: Applying dynamical\n	systems\n	\n	theory to
  a climate problem\, Discr. Cont. Dyn. Syst. – A\, 37(1)\, 189–228\,\n	doi:
 10.3934/dcds.2017008.\n
DTSTART:20170112T203000Z
DTEND:20170112T220000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Departmental Seminar: The Wind-Driven Ocean Circulation: Bifurcatio
 ns\, Simulations and Observations by Dr. Michael Ghil
URL:/meteo/channels/event/departmental-seminar-wind-dr
 iven-ocean-circulation-bifurcations-simulations-and-observations-dr-265045
END:VEVENT
END:VCALENDAR