Results 11 to 20 of about 5,354,916 (300)
The dynamics of unstable waves in sea ice [PDF]
Scientific Reports, 2023 AbstractWave and sea ice properties in the Arctic and Southern Oceans are linked by feedback mechanisms, therefore the understanding of wave propagation in these regions is essential to model this key component of the Earth climate system. The most striking effect of sea ice is the attenuation of waves at a rate proportional to their frequency.
Alberello, Alberto +2 more
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Rigorous Analysis and Dynamics of Hibler’s Sea Ice Model [PDF]
Journal of Nonlinear Science, 2022 AbstractThis article develops for the first time a rigorous analysis of Hibler’s model of sea ice dynamics. Identifying Hibler’s ice stress as a quasilinear second-order operator and regarding Hibler’s model as a quasilinear evolution equation, it is shown that a regularized version of Hibler’s coupled sea ice model, i.e., the model coupling velocity ...
Felix Brandt 0004 +3 more
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Benefits and challenges of dynamic sea-ice for weather forecasts [PDF]
Weather and Climate Dynamics, 2022 Abstract. The drive to develop environmental prediction systems that are seamless across both weather and climate timescales has culminated in the development and use of Earth system models, which include a coupled representation of the atmosphere, land, ocean and sea ice, for medium-range weather forecasts. One region where such a coupled Earth system
Jonathan J. Day +7 more
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Well-Posedness of Hibler’s Dynamical Sea-Ice Model
Journal of Nonlinear Science, 2022 This paper establishes the local-in-time well-posedness of solutions to an approximating system constructed by mildly regularizing the dynamical sea-ice model of {\it W.D. Hibler, Journal of Physical Oceanography, 1979}. Our choice of regularization has been carefully designed, prompted by physical considerations, to retain the original coupled ...
Xin Liu 0037 +2 more
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Fluids, 2021 The marginal ice zone is a highly dynamical region where sea ice and ocean waves interact. Large-scale sea ice models only compute domain-averaged responses.
Rutger Marquart +6 more
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On the Damping Time Scale of EVP Sea Ice Dynamics
Journal of Advances in Modeling Earth Systems, 2021 We propose to make the damping time scale, which governs the decay of pseudo‐elastic waves in the Elastic Viscous Plastic (EVP) sea‐ice solvers, independent of the external time step and large enough to warrant numerical stability for a moderate number ...
Sergey Danilov +4 more
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Sea-ice dynamics strongly promote Snowball Earth initiation and destabilize tropical sea-ice margins [PDF]
Climate of the Past, 2012 The Snowball Earth bifurcation, or runaway ice-albedo feedback, is defined for particular boundary conditions by a critical CO<sub>2</sub> and a critical sea-ice cover (SI), both of which are essential for evaluating hypotheses related to ...
A. Voigt, D. S. Abbot
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Journal of Glaciology, 2023 In situ observations of wave attenuation by sea ice are required to develop and validate wave–ice interaction parameterizations in coupled wave models.
Joey J. Voermans +2 more
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Observations of exponential wave attenuation in Antarctic sea ice during the PIPERS campaign
Annals of Glaciology, 2020 Quantifying the rate of wave attenuation in sea ice is key to understanding trends in the Antarctic marginal ice zone extent. However, a paucity of observations of waves in sea ice limits progress on this front.
Alison L. Kohout +5 more
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On the dynamic instability of Arctic sea ice [PDF]
npj Climate and Atmospheric Science, 2019 AbstractThe last few decades have seen a significant decline in Arctic sea ice, generating concerns about both its causes and its longer-term implications. In this paper, we introduce an empirical technique to examine the dynamics of Arctic sea ice extent. Using quantile autoregression, we find that the negative effect of atmospheric CO2 is stronger in
Jean-Paul Chavas, Corbett Grainger
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