scholarly journals Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 1. Measurement of Wave Spectra and Ice Features From Sentinel 1A

2018 ◽  
Vol 123 (5) ◽  
pp. 3619-3634 ◽  
Author(s):  
J. E. Stopa ◽  
F. Ardhuin ◽  
Jim Thomson ◽  
Madison M. Smith ◽  
Alison Kohout ◽  
...  
Keyword(s):  
Wave Attenuation ◽  
Wave Spectra ◽  
Marginal Ice Zone

Short-period P-wave attenuation along various paths in North America as determined from P-wave spectra of the SALMON nuclear explosion

1976 ◽  
Vol 66 (5) ◽  
pp. 1609-1622 ◽  
Author(s):  
Zoltan A. Der ◽  
Thomas W. McElfresh
Keyword(s):  
United States ◽  
North America ◽  
Wave Attenuation ◽  
Nuclear Explosion ◽  
P Wave ◽  
Western United States ◽  
Source Spectrum ◽  
Wave Spectra ◽  
Short Period ◽  
Q Values

abstract Average Q values were determined for ray paths to various LRSM stations from the SALMON nuclear explosion by taking ratios of observed P-wave spectra to the estimated source spectrum. Most Q values for P-wave paths throughout eastern North America are in the range 1600 to 2000 while those crossing over into the western United States are typically around 400 to 500. These differences in Q for intermediate distances can sufficiently explain the differences in the teleseismic event magnitudes observed, 0.3 to 0.4 magnitude units, in the western versus the eastern United States, if one assumes that the low Q layer under the western United States is located at depths less than 200 km.

scholarly journals Altimetric observation of wave attenuation through the Antarctic marginal ice zone using ICESat-2

2021 ◽  
Author(s):  
Jill Brouwer ◽  
Alexander D. Fraser ◽  
Damian J. Murphy ◽  
Pat Wongpan ◽  
Alberto Alberello ◽  
...  
Keyword(s):  
Sea Ice ◽  
Significant Wave Height ◽  
Wave Attenuation ◽  
Physical Processes ◽  
Sea Ice Concentration ◽  
New Techniques ◽  
Ice Concentration ◽  
Marginal Ice Zone ◽  
Wave Height Attenuation ◽  
The Antarctic

Abstract. The Antarctic marginal ice zone (MIZ) is a highly dynamic region where sea ice interacts with ocean surface waves generated in ice-free areas of the Southern Ocean. Improved large-scale (satellite-based) estimates of MIZ width and variability are crucial for understanding atmosphere-ice-ocean interactions and biological processes, and detection of change therein. Legacy methods for defining the MIZ width are typically based on sea ice concentration thresholds, and do not directly relate to the fundamental physical processes driving MIZ variability. To address this, new techniques have been developed to determine MIZ width based on the detection of waves and calculation of significant wave height attenuation from variations in ICESat-2 surface heights. The poleward MIZ limit (boundary) is defined as the location where significant wave height attenuation equals the estimated satellite height error. Extensive automated and manual acceptance/rejection criteria are employed to ensure confidence in MIZ width estimates, due to significant cloud contamination of ICESat-2 data or where wave attenuation was not observed. Analysis of 304 MIZ width estimates retrieved from four months of 2019 (February, May, September and December) revealed that sea ice concentration-derived MIZ width estimates were far narrower (by a factor of ~7) than those from the new techniques presented here. These results suggest that indirect methods of MIZ estimation based on sea ice concentration are insufficient for representing physical processes that define the MIZ. Improved measurements of MIZ width based on wave attenuation will play an important role in increasing our understanding of this complex sea ice zone.

scholarly journals Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup

2018 ◽  
Vol 123 (8) ◽  
pp. 5652-5668 ◽  
Author(s):  
Fabrice Ardhuin ◽  
Guillaume Boutin ◽  
Justin Stopa ◽  
Fanny Girard‐Ardhuin ◽  
Christian Melsheimer ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Wave Attenuation ◽  
Ice Breakup ◽  
Marginal Ice Zone

scholarly journals Towards a coupled model to investigate wave–sea ice interactions in the Arctic marginal ice zone

2020 ◽  
Vol 14 (2) ◽  
pp. 709-735 ◽  
Author(s):  
Guillaume Boutin ◽  
Camille Lique ◽  
Fabrice Ardhuin ◽  
Clément Rousset ◽  
Claude Talandier ◽  
...  
Keyword(s):  
Sea Ice ◽  
Wave Attenuation ◽  
Coupled Model ◽  
Wave Model ◽  
The Arctic ◽  
Wave Radiation ◽  
Strong Interactions ◽  
Sea Ice Concentration ◽  
Ocean Surface Waves ◽  
Marginal Ice Zone

Abstract. The Arctic marginal ice zone (MIZ), where strong interactions between sea ice, ocean and atmosphere take place, is expanding as the result of ongoing sea ice retreat. Yet, state-of-the-art models exhibit significant biases in their representation of the complex ocean–sea ice interactions taking place in the MIZ. Here, we present the development of a new coupled sea ice–ocean wave model. This setup allows us to investigate some of the key processes at play in the MIZ. In particular, our coupling enables us to account for the wave radiation stress resulting from the wave attenuation by sea ice and the sea ice lateral melt resulting from the wave-induced sea ice fragmentation. We find that, locally in the MIZ, the ocean surface waves can affect the sea ice drift and melt, resulting in significant changes in sea ice concentration and thickness as well as sea surface temperature and salinity. Our results highlight the need to include wave–sea ice processes in models used to forecast sea ice conditions on short timescales. Our results also suggest that the coupling between waves and sea ice would ultimately need to be investigated in a more complex system, allowing for interactions with the ocean and the atmosphere.

scholarly journals Towards a three-dimensional model of wave–ice interaction in the marginal ice zone

2010 ◽  
Vol 662 ◽  
pp. 1-4 ◽  
Author(s):  
C. M. LINTON
Keyword(s):  
Three Dimensional ◽  
Ocean Waves ◽  
Wave Spectra ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
The Past ◽  
Marginal Ice Zone ◽  
Directional Wave ◽  
Ice Floes ◽  
Made In

Over the past forty or so years, considerable advances have been made in our understanding of the effects of ocean waves on sea ice, and vice versa, with observations, experiments and theory all playing their part. Recent years have seen the development of ever more sophisticated mathematical models designed to represent the physics more accurately and incorporate new features. What is lacking is an approach to three-dimensional scattering for ice floes that is both accurate and efficient enough to be used as a component in a theory designed to model the passage of directional wave spectra through the marginal ice zone. Bennetts & Williams (J. Fluid Mech., 2010, this issue, vol. 662, pp. 5–35) have brought together a number of solution techniques honed on simpler problems to provide just such a component.

scholarly journals Toward a coupled model to investigate wave-sea ice interactions in the Arctic marginal ice zone

2019 ◽  
Author(s):  
Guillaume Boutin ◽  
Camille Lique ◽  
Fabrice Ardhuin ◽  
Clément Rousset ◽  
Claude Talandier ◽  
...  
Keyword(s):  
Sea Ice ◽  
Wave Attenuation ◽  
Coupled Model ◽  
Wave Model ◽  
The Arctic ◽  
Strong Interactions ◽  
Short Time Scale ◽  
Sea Ice Concentration ◽  
Marginal Ice Zone ◽  
Wave Induced

Abstract. The Arctic Marginal Ice Zone (MIZ), where strong interactions between sea ice, ocean and atmosphere are taking place, is expanding as the result of the on-going sea ice retreat. Yet, state-of-art models are not capturing the complexity of the varied processes occurring in the MIZ, and in particular the processes involved in the ocean-sea ice interactions. In the present study, a coupled sea ice - wave model is developed, in order to improve our understanding and model representation of those interactions. The coupling allows us to account for the wave radiative stress resulting from the wave attenuation by sea ice, and the sea ice lateral melt resulting from the wave-induced sea ice break-up. We found that, locally in the MIZ, the waves can affect the sea ice drift and melt, resulting in significant changes in sea ice concentration and thickness as well as sea surface temperature and salinity. Our results highlight the need to include the wave-sea ice processes in models aiming at forecasting sea ice conditions on short time scale, although the coupling between waves and sea ice would probably required to be investigated in a more complex system, allowing for interactions with the ocean and the atmosphere.

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