Discrete-element sea ice modeling – development of theoretical and numerical methods - Project - Bridge of Knowledge

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Discrete-element sea ice modeling – development of theoretical and numerical methods

The subject of the project is sea ice dynamics, especially dynamics of strongly fragmented sea ice and processes leading to ice fragmentation, as well as sub-mesoscale interactions of the sea ice cover with the ocean and the atmosphere. The main project objectives are:

  1. To improve existing and to develop new mathematical models of sea icewaves interactions suitable for further implementation in discrete-element models, i.e., consistent with underlying concepts of these models.
  2. To formulate, based on the theoretical results, numerical icewaves interaction algorithms, and to implement these algorithms in the code of the Discrete-Element bonded-particle Sea Ice model (DESIgn; see model homepage).
  3. To verify a hypothesis that: (i) wave-induced breaking tends to produce narrow floe-size distributions (FSD) and polygonal floe shapes and (ii) that further grinding of ice floes by shearing deformation in the inner parts of the marginal ice zone is responsible for the observed heavy-tailed FSDs and rounded floe shapes.
  4. To extend the range of applicability of the DESIgn model by developing and implementing parametrization schemes for selected physical processes (e.g., pressure ridging; freezing and melting). Also, to add new functionalities that will facilitate further development and novel applications of the model.
  5. To improve our understanding of factors that may lead to rapid fragmentation of the sea ice cover over large domains, similar to the dramatic break-up event that took place in the Beaufort Sea in winter 2013.
  6. To use high-resolution numerical modeling to improve our understanding of the atmospheresea iceocean interactions in situations with fragmented sea ice and/or close to the ice edge. To analyze the influence of FSD on heat and momentum fluxes at the sea surface, turbulence, mixing and vertical stability in the tropospheric and oceanic boundary layers. Also, to verify existing hypotheses of ice-band formation close to the ice edge.
  7. To develop parameterizations of the above-mentioned effects, taking into account the floe-size distribution, suitable for future implementation in continuum sea ice models.

A full description of the project can be found here.
A short popular-science summary is here.

Details

Project's acronym:
Sea Ice Project 1
Financial Program Name:
OPUS
Organization:
Narodowe Centrum Nauki (NCN) (National Science Centre)
Agreement:
2015/19/B/ST10/01568 z dnia 2016-07-27
Realisation period:
2016-07-27 - 2020-01-26
Research team leader:
dr hab. Agnieszka Herman
Realised in:
Zakład Oceanografii Fizycznej
Project's value:
462 960.00 PLN
Request type:
National Research Programmes
Domestic:
Domestic project
Verified by:
No verification

Papers associated with that project

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