Consulta: creatorFacets:"Cheng, Yongcun"
Registros recuperados: 2
Data/hora: 26/07/2024 22:50:22

Impacts of oil spills on altimeter waveforms and radar backscatter cross-section
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheng, Yongcun; Tournadre, Jean; Li, Xiaofeng; Xu, Qing; Chapron, Bertrand.
Ocean surface films can damp short capillary-gravity waves, reduce the surface mean square slope, and induce “sigma0 blooms” in satellite altimeter data. No study has ascertained the effect of such film on altimeter measurements due to lack of film data. The availability of Environmental Response Management Application (ERMA) oil cover, daily oil spill extent and thickness data acquired during the Deepwater Horizon (DWH) oil spill accident provides a unique opportunity to evaluate the impact of surface film on altimeter data. In this study, the Jason-1/2 passes nearest to the DWH platform are analyzed to understand the waveform distortion caused by the spill as well as the variation of σ0 as a function of oil thickness, wind speed and radar band. Jason-1/2...
Tipo: Text
Palavras-chave: Oil spill; Altimeter; Sigma0 bloom; Waveform.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00381/49203/49635.pdf

Multimission empirical ocean tide modeling for shallow waters and polar seas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cheng, Yongcun; Andersen, Ole Baltazar.
A new global ocean tide model named DTU10 (developed at Technical University of Denmark) representing all major diurnal and semidiurnal tidal constituents is proposed based on an empirical correction to the global tide model FES2004 (Finite Element Solutions), with residual tides determined using the response method. The improvements are achieved by introducing 4 years of TOPEX-Jason 1 interleaved mission into existing 18 years (1993-2010) of primary joint TOPEX, Jason 1, and Jason 2 mission time series. Hereby the spatial distribution of observations are doubled and satellite altimetry should be able to recover twice the spatial variations of the tidal signal which is particularly important in shallow waters where the spatial scale of the tidal signal is...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00489/60026/63289.pdf