Faculty Candidate Seminar - Alon Stern

02/08/2016 - 3:30pm


DATE:  February 8th, Monday, 3:30 p.m.  

LOCATION:  Hubbs Hall 4500
SPEAKER:   Alon Stern, Ph.D.
Princeton University

TITLE:  Ice shelf melting and breaking: implications for Antarctic Climate

The freshwater flux from the Antarctic continent into the global ocean occurs through basal melting and the calving of icebergs off the edge of Antarctic ice shelves. The meltwater from basal melting affects local hydrography and plays a role in driving local ocean currents around Antarctica. In contrast, icebergs can drift long distances from their calving origins before melting entirely, depositing their meltwater remotely and affecting sea ice formation and climate away from the Antarctic coastline.
This talk focuses on the mechanisms (and ocean currents) that move heat and freshwater towards and away from the Antarctic ice shelves. These heat delivery mechanisms are discussed using a combination of laboratory experiments, analysis of field observations, and both complex and simple numerical models. With these mechanisms in mind, a fully-coupled general circulation model with an iceberg component is used to investigate how the partitioning of the Antarctic freshwater flux into basal melting and iceberg calving affects the greater climate system. Finally, we discuss some new ideas and innovations for iceberg and ice shelf modeling, which are a step towards creating a unified ice modeling framework. 

Faculty Host:   Ian Eisenman (eisenman@ucsd.edu)
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Hubbs Hall 4500