[natphil] 2020-2021 J.Tuzo Wilson Lecture on Feb 24th

[The J Tuzo Wilson Lecture mailing list]

Dear All,

You are invited to join the 2020-2021 J. Tuzo Wilson lecture on Feb
24th, 4:10 -6 pm by Dr. Ron Kwok:

Title: Arctic sea ice thickness: From submarine sonars to satellite
photon-counting altimeters

Speaker: Dr. Ron Kwok (University of Washington)

Date/Time: Wed, Feb 24, 2021 Time: 4:10-6:00pm

Zoom link: 
https://zoom.us/j/98984389560?pwd=TmFqS2ZUQXhoZ3h1dXgxL25LRisrQT09
(webinar ID: 989 8438 9560)

Abstract:
Alongside the widely reported decline in Arctic ice extent, there have
also been dramatic losses in sea ice thickness and volume. Instead of
a relatively consistent record of sea ice coverage from satellite
passive microwave radiometers since the late seventies, assessments
of large-scale decadal changes in sea ice thickness and volume have
depended on measurements from a variety of sources: submarine and
airborne surveys, and mapping with satellite altimetry. Even though
there is sometimes sparse sampling (in space and time), lack of
consistency in measurement approaches and continuity in individual
records, these combined thickness datasets broadly depict an ice cover
that has thinned everywhere. Why are sea ice thickness measurements so
difficult to obtain? In my talk, I will provide a brief description of
the nature of the ice cover, a short history of how we have
constructed a record of sea ice thickness of the Arctic Ocean, current
technologies for observing the ice thickness, and the changes in
thickness and volume over the last half century.

For more information, please check out the event webpage:
https://tuzowilson.physics.utoronto.ca/

John Tuzo Wilson was a member of the Department of Physics at
University of Toronto, and is probably Canada's most illustrious
geoscientist. The J. Tuzo Wilson public Lecture is a well-established
annual event sponsored by the department of Physics, University of
Toronto, since 1996 which draws people from a broad spectrum of
Toronto's vibrant intellectual community. Past Wilson lectures are
listed here:
https://tuzowilson.physics.utoronto.ca/j-tuzo-wilson-lecture-series/

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