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	Provedor de dados ArchiMer (4) Autor Ardhuin, Fabrice (2) Doble, Martin (2) Wadhams, Peter (2) Bricheno, Lucy (1) Brozena, John (1) Cheng, Sukun (1) Kohout, Alison (1) Mitchell, Neil C. (1) Quartau, Rui (1) Rogers, W. Erick (1) Shen, Hayley H (1) Smith, Madison M. (1) Stopa, J. E. (1) Stopa, Justin (1) Sutherland, Peter (1) Tempera, Fernando (1) Thomson, Jim (1) Zhao, Zhongwei (1) Mais... Palavra-chave Wave attenuation (4) Air-sea-ice (1) Airborne scanning lidar (1) Arctic Ocean marginal ice zone (1) Arctic Sea State Boundary Layer Physics Program (1) Azores (1) Coastal erosion (1) Linear surface gravity wave (1) Marginal ice zone (1) Pack ice (1) Remote sensing (1) SAR derived wave spectra (1) Sentinel-1A SAR (1) Submarine platform (1) Surface waves (1) Surtseyan eruption (1) Viscoelastic model calibration (1) Wave growth rate (1) Wave-ice interaction (1) Mais... Tipo do documento Text (4) Ano 2019 (2) 2018 (2) País France (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October, 2015: 1. Measurement of Wave Spectra and Ice Features From Sentinel-1A ArchiMer Stopa, J. E.; Ardhuin, Fabrice; Thomson, Jim; Smith, Madison M.; Kohout, Alison; Doble, Martin; Wadhams, Peter. A storm with significant wave heights exceeding 4 m occurred in the Beaufort Sea on 11 to 13 October, 2015. The waves and ice were captured on 12 October by the Synthetic Aperture Radar (SAR) on board Sentinel‐1A, with Interferometric Wide swath images covering 400 × 1100 km at 10 m resolution. This dataset allows the estimation of wave spectra across the marginal ice zone (MIZ) every 5 km, over 400 km of sea ice. Since ice attenuates waves with wavelengths shorter than 50 m in a few kilometers, the longer waves are clearly imaged by SAR in sea ice. Obtaining wave spectra from the image requires a careful estimation of the blurring effect produced by unresolved wavelengths in the azimuthal direction. Using in‐situ wave buoy measurements as reference, we... Tipo: Text Palavras-chave: Wave-ice interaction; Arctic Ocean marginal ice zone; Sentinel-1A SAR; Arctic Sea State Boundary Layer Physics Program; Remote sensing; Wave attenuation. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00439/55084/56519.pdf Submarine platform development by erosion of a Surtseyan cone at Capelinhos, Faial Island, Azores ArchiMer Zhao, Zhongwei; Mitchell, Neil C.; Quartau, Rui; Tempera, Fernando; Bricheno, Lucy. Erosion of volcanic islands ultimately creates shallow banks and guyots, but the ways in which erosion proceeds to create them over time and how the coastline retreat rate relates to wave conditions, rock mass strength and other factors are unclear. The Capelinhos volcano was formed in 1957/58 during a Surtseyan and partly effusive eruption that added an ~2.5 km2 tephra and lava promontory to the western end of Faial Island (Azores, central North Atlantic). Subsequent coastal and submarine erosion has reduced the subaerial area of the promontory and created a submarine platform. This study uses historical information, photos and marine geophysical data collected around the promontory to characterize how the submarine platform developed following the... Tipo: Text Palavras-chave: Submarine platform; Coastal erosion; Surtseyan eruption; Wave attenuation; Azores. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00590/70196/70234.pdf Spectral attenuation of gravity wave and model calibration in pack ice ArchiMer Cheng, Sukun; Stopa, Justin; Ardhuin, Fabrice; Shen, Hayley H. We investigate an instance of wave propagation in the fall of 2015 in thin pack ice (<0.3 m) and use the resulting attenuation data to calibrate two viscoelastic wave-in-ice models that describe wave evolution. The study domain is 400 km by 300 km adjacent to a marginal ice zone (MIZ) in the Beaufort Sea. From Sentinel-1A synthetic aperture radar (SAR) imagery, the ice cover is divided into two regions delineated by the first appearance of leads. According to the quality of SAR retrievals, we focus on a range of wavenumbers corresponding to 9∼15 s waves from the open water dispersion relation. By pairing directional wave spectra from different locations, we obtain wavenumber-dependent attenuation rates, which slightly increase with increasing wavenumber... Tipo: Text Palavras-chave: Pack ice; Linear surface gravity wave; SAR derived wave spectra; Wave attenuation; Viscoelastic model calibration. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00599/71123/69427.pdf Airborne Remote Sensing of Wave Propagation in the Marginal Ice Zone ArchiMer Sutherland, Peter; Brozena, John; Rogers, W. Erick; Doble, Martin; Wadhams, Peter. Airborne scanning lidar was used to measure the evolution of the surface wave field in the marginal ice zone (MIZ) during two separate wave events in the Beaufort Sea in October 2015. The lidar data consisted of a 2‐D field of surface elevation with horizontal resolutions between 17 and 33 cm, over a swath approximately 150‐220 m wide, centred on the ground track of the aircraft. Those data were used to compute directional wavenumber spectra of the surface wave field. Comparison with nearly collocated buoy data found the lidar and buoy measurements to be generally consistent. During the first event, waves travelling from open water into the ice were attenuated by the ice. The low spectral spreading and k7/4 spectral dependence of the attenuation was... Tipo: Text Palavras-chave: Surface waves; Marginal ice zone; Wave attenuation; Wave growth rate; Air-sea-ice; Airborne scanning lidar. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00439/55086/56526.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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