Zobrazeno 1 - 10 of 192 pro vyhledávání: '"Werner Alpers"'
1
Akademický článek
On Radar Signatures of Upwelling
Autor: Werner ALPERS,Kan ZENG
Publikováno v: Journal of Geodesy and Geoinformation Science, Vol 4, Iss 1, Pp 17-23 (2021)
In studies of upwelling, usually data from infrared and optical sensors is used which provides information on the sea surface temperature (SST) and the chlorophyll-a (Chl-a) concentration. In this paper, we show that also synthetic aperture radars (S
Externí odkaz: https://doaj.org/article/9fcdf6b2c951451ca080cd1115ab8cdf
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2
Akademický článek
Nonlinear Internal Waves in Synthetic Aperture Radar Imagery
Autor: Werner Alpers, José C.B. da Silva, Christopher R. Jackson, Michael J. Caruso
Publikováno v: Oceanography, Vol 26, Iss 2, Pp 68-79 (2013)
Synthetic aperture radar (SAR) has contributed significantly to the study and understanding of oceanic nonlinear internal waves. Although they travel within the ocean's interior, currents associated with internal waves produce variations in ocean sur
Externí odkaz: https://doaj.org/article/c480cb558f8f4297bd5ee0abd742a270
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3
Surface Wave Breaking Caused by Internal Solitary Waves: Effects on Radar Backscattering Measured by SAR and Radar Altimeter
Autor: Jose Machado da Silva, Adriana M. Santos-Ferreira, J.M. Magalhaes, Werner Alpers
Publikováno v: Oceanography. 34
Breaking surface waves play a key role in the exchange of momentum, heat, and gases between the atmosphere and the ocean. Waves break at the ocean’s surface at high or medium wind speeds or in the absence of wind due to shoaling of the seafloor. Ho
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7cfdc8a09edba57d1232d839fda0035
https://doi.org/10.5670/oceanog.2021.203
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4
A note on radar signatures of hydrometeors in the melting layer as inferred from Sentinel-1 SAR data acquired over the ocean
Autor: Yuan Zhao, Pak Wai Chan, Werner Alpers, Alexis Mouche
Publikováno v: Remote Sensing Of Environment (0034-4257) (Elsevier BV), 2021-02, Vol. 253, P. 112177 (10p.)
Synthetic aperture radar (SAR) images acquired over the ocean often show radar signatures of rain, which are not easy to interpret. The scattering mechanisms causing radar signatures are usually attributed to surface scattering due to sea surface rou
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3da98cfe3e5a7e8e647b2384a7c64152
https://archimer.ifremer.fr/doc/00659/77140/
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5
Breaking Location of Internal Solitary Waves Over a Sloping Seabed
Autor: Werner Alpers, Giovanni la Forgia, Eleonora Martorelli, Claudia Adduce, Davide Cavaliere, Federico Falcini
Publikováno v: Journal of geophysical research. Oceans
126 (2021). doi:10.1029/2020JC016669
info:cnr-pdr/source/autori:Cavaliere D.; la Forgia G.; Adduce C.; Alpers W.; Martorelli E.; Falcini F./titolo:Breaking Location of Internal Solitary Waves Over a Sloping Seabed/doi:10.1029%2F2020JC016669/rivista:Journal of geophysical research. Oceans (Print)/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume:126
We present a semi-analytical model for predicting the breaking location of internal solitary waves (ISWs) over a sloping seabed. Our conceptual model is based on laboratory experiments, performed in a wave tank, that reproduce the ISW breaking mechan
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d834d139b7f84984698c091792d2522
http://hdl.handle.net/11580/86905
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6
Small-Scale and Sub-Mesoscale Phenomena Associated with Upwelling Studied by SAR
Autor: Werner Alpers, Francesco Bignami
Publikováno v: IGARSS
In the wake of upwelling events, often small-scale and sub-mesoscale phenomena, like filaments, sub-mesoscale eddies and internal waves, are encountered in the upper ocean layer. Because of their small scale, they are hard to detect from space. Somet
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::828d2f9f9adf32cb3a415f48ff5c0c27
https://doi.org/10.1109/igarss39084.2020.9324140
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7
Oil spill detection by imaging radars: Challenges and pitfalls
Autor: Benjamin Holt, Kan Zeng, Werner Alpers
Publikováno v: IGARSS
Criteria for discriminating between radar signatures of oil films and biogenic slicks visible on synthetic aperture radar (SAR) images of the sea surface as dark patches are critically reviewed. We question the often claimed high success rate of oil
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ffd7b80a8582190c3affa42bb3d51bb
https://doi.org/10.1016/j.rse.2017.09.002
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10
On the Use of SAR in Studies of Upwelling
Autor: Werner Alpers
Publikováno v: IGARSS
In studies of upwelling, usually data from infrared and optical sensors are used which provide information on the sea surface temperature (SST) and the chlorophyll-a (Chl-a) concentration. In this paper we show that also synthetic aperture radars (SA
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d566e5f41a24e7e4a6cfec82b5a3ed20
https://doi.org/10.1109/igarss.2018.8517686
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