GFDL Formal Seminar

Thu, Nov 8, 2018, 2:00 pm to 3:00 pm

The Beaufort Gyre is a key circulation system of the Arctic Ocean and its main reservoir of freshwater. We describe a mechanism that is fundamental to its dynamics, namely the “ice-ocean stress governor”. Wind blows over the ice and the ice drags the ocean. But as the gyre spins up, currents catch the ice up and turn off the surface stress. This governor sets the basic properties of the gyre, such as its depth, freshwater content, and strength. Analytical and numerical modeling is employed to contrast the equilibration processes in an ice-covered versus ice-free gyre. We argue that as the Arctic warms, reduced sea-ice extent and more mobile ice will result in a deeper and faster Beaufort gyre, accumulating more freshwater which will be released by Ekman upwelling or baroclinic instability. Finally, we describe how the Ice-Ocean governor might play an important role south of the Antarctic Divergence in the seasonal ice zone of the Southern Ocean.

Location: 
Smagorinsky Seminar Room 209
Speaker(s): 

ACEE Highlight Seminar Series

Thu, Nov 15, 2018, 12:30 pm to 1:30 pm
Location: Maeder Hall

EGGS Seminar - Graduate Student Presentations

Thu, Nov 15, 2018, 12:30 pm to 2:00 pm
Location: Guyot 220

GFDL Formal Seminar

Thu, Nov 15, 2018, 2:00 pm to 3:00 pm
Location: Smagorinsky Seminar Room 209

GFDL Informal Seminar

Fri, Nov 16, 2018, 10:30 am to 11:30 am
Location: Smagorinsky Seminar Room 209

GEO Solid Earth Brown Bag Seminar

Fri, Nov 16, 2018, 12:00 pm to 1:00 pm
Location: Guyot 220

GEO Department Lecture Series

Tue, Nov 20, 2018, 12:30 pm to 1:30 pm
Location: Guyot 10

David Bradford STEP Seminar

Mon, Nov 26, 2018, 12:00 pm to 1:00 pm
Location: Wallace Hall 300

GEO Department Lecture Series

Tue, Nov 27, 2018, 12:30 pm to 1:30 pm
Location: Guyot 10

PEI Energy Table

Wed, Nov 28, 2018, 6:30 pm to 7:30 pm
Location: Mathey College PDR room

Environmental Geology & Geochemistry Seminar (EGGS)

Thu, Nov 29, 2018, 12:30 pm to 1:30 pm
Location: Guyot 220