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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Degrees of freedom in the marginal ice zone&\;#
39\;s wave--ice system - Johannes E. M. Mosig (Uni
versity of Otago)
DTSTART;TZID=Europe/London:20171006T133000
DTEND;TZID=Europe/London:20171006T141500
UID:TALK84431AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/84431
DESCRIPTION:The marginal ice zones (MIZs) in both the Arctic a
nd Southern Oceans play a key role in the Earth
9\;s climate system and the impact of sea ice on w
ave propagation is important to understand in orde
r to create reliable wave forecasting models. To c
reate efficient and accurate models of the MIZ'
\;s wave-ice system one must first identify the de
grees of freedom that are relevant for such a mode
l. In my PhD thesis and in this presentation\, I w
ill illuminate aspects of three commonly pursued p
aradigms: (i) floe models\, where the degrees of f
reedom are comprised of individual ice floes\; (ii
) effective material models such as the one propos
ed by Wang and Shen (2010\, dx.doi.org/10.1029/200
9JC005591)\; and (iii) energy transport models\, w
here the relevant degree of freedom is a single sc
alar field&mdash\;the wave intensity&mdash\;define
d over the horizontal ocean domain.  \;
Throughout this talk I will touch upon various
mathematical and computational techniques which h
ave very general applications\, yet are rarely use
d by the wave and sea ice community.  \;Specif
ically\, I use the method framework of generalized
polynomial chaos to investigate the propagation o
f uncertainties in various models. Moreover\, I at
tempt to derive an analytical relationship between
local scale potential flow theory\, and the large
-scale transport equation description of the MIZ\,
using a multi-scale expansion and a Wigner transf
orm of the amplitude envelope of a propagating wav
e package.  \;
Supervisors: Vernon A
. Squire\, Fabien Montiel Publications: Mosig e
t al.\, Comparison of viscoelastic-type models for
ocean wave attenuation in ice-covered seas\, 2015
\, dx.doi.org/10.1002/2015JC010881 Mosig et al.\,
Water wave scattering from a mass loading ice flo
e of random length using generalised polynomial ch
aos\, dx.doi.org/10.1016/j.wavemoti.2016.09.005
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:INI IT
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