BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT UID:16aa977f0a218514cfaad9247bbaff70 CATEGORIES:Polar Conferences, Meetings and Events CREATED:20200505T082127 SUMMARY:Polar Seminar: Dynamical Controls of Fjord and Ice-Shelf Cavity Circulation DESCRIPTION:Please join us remotely this Thursday (5/7) at 2:00 pm for the next Polar S eminar! Our speaker will be Ken Zhao from UCLA. He will present a talk enti tled " Dynamical Controls of Fjord and Ice-Shelf Cavity Circulation". You c an register for the meeting using the Zoom link below: The oceanic connecti ons between glaciers and continental shelf waters are modulated and control led by geometrically complex fjords and ice-shelf cavities. Fjords and ice- shelf cavities both exhibit overturning circulations and horizontal recircu lations, driven by a combination of water mass transformation near the glac ier, variability on the continental shelf, and atmospheric forcing. However , it remains unclear which geometric and forcing parameters are the most im portant in exerting control on the overturning and horizontal recirculation strength.\n \nI will present two sets of idealized numerical simulations ( and accompanying supporting theories) using an isopycnal model of: (1) a st and-alone ice-shelf cavity and (2) a fjord connected to a continental shelf , which are representative of those found in Greenland and Antarctica. A ra nge of sensitivity experiments are performed and find that sill height, win d direction/strength, subglacial discharge strength, and depth of offshore warm water are of first-order importance to the overturning circulation, wh ile fjord/cavity width is also first-order important to the horizontal reci rculation. A simple vorticity budget is also developed and tested to assess the strength of the horizontal recirculation, which provides a scaling in terms of the overturning circulation and bottom friction. Based on these th eories, we are able to make a priori predictions of glacial melt rates that take into account the overturning and recirculation and may be used to ref ine estimates of ocean-driven melting of the Greenland and Antarctic ice sh eets.\n-------------------------------------------------------------------- ------------------------------\nHi there, \n\nYou are invited to a Zoom mee ting. \nWhen: May 7, 2020 02:00 PM Pacific Time (US and Canada) \n\nRegiste r in advance for this meeting:\n">https://ucsd.zoom.us/meeting/register/tJIkd-2vrDwpE9EBdWUGN7V7eZdNlWw XaUua \n\nAfter registering, you will receive a confirmation email containi ng information about joining the meeting.\n X-ALT-DESC;FMTTYPE=text/html:

Please join us remotely this Thursday (5/7) at 2:00 pm for the next Polar Seminar! Our spea ker will be Ken Zhao from UCLA. He will present a talk entitled " Dynamical Controls of Fjord and Ice-Shelf Cavity Circulation". You can register for the meeting using the Zoom link below:

The oceanic connections between glaci ers and continental shelf waters are modulated and controlled by geometrica lly complex fjords and ice-shelf cavities. Fjords and ice-shelf cavities bo th exhibit overturning circulations and horizontal recirculations, driven b y a combination of water mass transformation near the glacier, variability on the continental shelf, and atmospheric forcing. However, it remains uncl ear which geometric and forcing parameters are the most important in exerti ng control on the overturning and horizontal recirculation strength.

I will present two sets of idealized numerical simulations (an d accompanying supporting theories) using an isopycnal model of: (1) a stan d-alone ice-shelf cavity and (2) a fjord connected to a continental shelf, which are representative of those found in Greenland and Antarctica. A rang e of sensitivity experiments are performed and find that sill height, wind direction/strength, subglacial discharge strength, and depth of offshore wa rm water are of first-order importance to the overturning circulation, whil e fjord/cavity width is also first-order important to the horizontal recirc ulation. A simple vorticity budget is also developed and tested to assess t he strength of the horizontal recirculation, which provides a scaling in te rms of the overturning circulation and bottom friction. Based on these theo ries, we are able to make a priori predictions of glacial melt rates that t ake into account the overturning and recirculation and may be used to refin e estimates of ocean-driven melting of the Greenland and Antarctic ice shee ts.

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Hi there,
You are invited to a Zoom meeting.
When: May 7, 2020 02:00 PM Pacific Time (US and Canada)

Register in advance for this meeting:
https://ucsd.zoom.us/meeting/register/tJIkd-2vr DwpE9EBdWUGN7V7eZdNlWwXaUua__;!!Mih3wA!XrRGEasqs64zq1AusvNGgO10-fTHdzcBnHVl uu7hXltUesxf6lGa5fP8Cl8f7YLL$&source=gmail&ust=1588753173709000& ;usg=AFQjCNH1jKFsLfOBHpMEZzRp3rI8rgpZaQ">https://ucsd.zoom.us/meeting/register/tJIkd-2vrDwpE9EBdWUG N7V7eZdNlWwXaUua

After registering, you will receive a confirmation email containing information about joining the meeting.

DTSTAMP:20260421T220747Z DTSTART;TZID=UTC:20200507T080000 DTEND;TZID=UTC:20200507T170000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR