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2D ocean waves spectra from space: a challenge for validation and synergetic use ArchiMer
Mouche, Alexis; He, W.; Husson, R.; Guitton, Gilles; Chapron, Bertrand; Li, Huimin.
Sentinel-1 A now routinely acquires data over the ocean since 2014. Data are processed by ESA through the Payload Data Ground Segment up to Level-2 for Copernicus users. Level-2 products consist of geo-located geophysical parameters related to wind, waves and ocean current. In particular, Sentinel-1A wave measurements provide 2D ocean swell spectra (2D wave energy distribution as a function of wavelength and direction) as well as integrated parameters such as significant wave height, dominant wavelength and direction for each partition. In 2016, Sentinel-1 B will be launched by ESA and GF-3 by CNSA. Then in 2018, CFOSAT (China France Oceanography Satellite project), a joint mission from the Chinese and French Space Agencies, will be launched. They will...
Tipo: Text Palavras-chave: Ocean remote sensing; Synthetics aperture radar; Ocean wave-spectrometer; 2D ocean wave spectrum; Level-4.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00364/47469/47488.pdf
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Colletotrichum nigrum Ellis et Halstead. : anthracnose du piment IRD
Husson, R.; Chevaugeon, Jean.
Tipo: Text Palavras-chave: PATHOLOGIE VEGETALE; ANTHRACNOSE; CHAMPIGNON PARASITE; TAXONOMIE; REPARTITION GEOGRAPHIQUE; PLANTE HOTE; SYMPTOME; EPIDEMIOLOGIE; MORPHOLOGIE; BIOLOGIE DU PARASITE; METHODE DE LUTTE; PIMENT; COLLETOTRICHUM NIGRUM.
Ano: 1950 URL: http://www.documentation.ird.fr/hor/fdi:11840
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Revealing forerunners on Envisat's wave mode ASAR using the Global Seismic Network ArchiMer
Husson, R.; Ardhuin, Fabrice; Collard, Fabrice; Chapron, Bertrand; Balanche, Abel.
Swells radiating across ocean basins are fingerprints of the large ocean storms that generated them, which are otherwise poorly observed. Here we analyze the signature of one swell event in the seismic noise recorded all around the Pacific and we show that it is a natural complement to the global coverage provided by the Synthetic Aperture Radar wave mode data from ENVISAT. In particular the seismic stations are much more sensitive to low frequency and amplitude signals than buoys and SAR, capturing swell forerunners a couple of days before they can be detected from space or in situ data. This information helps detect in the SAR measurements the presence of very long swell, with periods of 22 s in our case example, that were otherwise excluded. Citation:...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00092/20328/17977.pdf
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