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Título: | Analog data assimilation of along-track nadir and wide-swath SWOT altimetry observations in the Western Mediterranean sea |
Autor: | Lopez-Radcenco, Manuel; Pascual, Ananda CSIC ORCID; Gomez-Navarro, Laura; Aissa-El-Bey, Abdeldjalil; Chapron, Bertrand; Fablet, Ronan | Palabras clave: | Data assimilation Numerical models Altimetry Computational modeling Data models Remote sensing Interpolation |
Fecha de publicación: | jul-2019 | Editor: | Institute of Electrical and Electronics Engineers | Citación: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 12(7): 2530-2540 (2019) | Resumen: | The growing availability of ocean data brought forth by recent advancements in remote sensing, in situ measurements, and numerical models supports the development of data-driven strategies as a powerful, computationally efficient alternative to model-based approaches for the interpolation of high-resolution, gap-free, regularly gridded sea surface geophysical fields from partial satellite-derived observations. In this paper, we investigate such data-driven strategies for the spatio-Temporal interpolation of sea level anomaly (SLA) fields in the Western Mediterranean Sea from satellite-derived altimetry data. We introduce and evaluate the analog data assimilation (AnDA) framework, which exploits patch-based analog forecasting operators within a classic Kalman-based data assimilation scheme. With a view toward the upcoming wide-swath surface water and ocean topography (SWOT) mission, two different types of altimetry data are assimilated: Along-Track nadir data and wide-swath SWOT altimetry data. Using an observing system simulation experiment, we demonstrate the relevance of AnDA as an improved interpolation method, particularly for mesoscale features in the 20-to 100-km horizontal scale range. Results report an SLA reconstruction RMSE (correlation) improvement of 42% (14%) with respect to optimal interpolation, and show a clear gain when the joint assimilation of SWOT and along-Track nadir observations are considered. | Versión del editor: | http://doi.org/10.1109/JSTARS.2019.2903941 | URI: | http://hdl.handle.net/10261/203961 | DOI: | 10.1109/JSTARS.2019.2903941 | ISSN: | 1939-1404 | E-ISSN: | 2151-1535 |
Aparece en las colecciones: | (IMEDEA) Artículos |
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