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Registros recuperados: 34
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A high-resolution 44-year atmospheric hindcast for the Mediterranean Basin: contribution to the regional improvement of global reanalysis ArchiMer
Sotillo, M; Ratsimandresy, A; Carretero, J; Bentamy, Abderrahim; Valero, F; Gonzalez Rouco, F.
A 44-year (1958-2001) high-resolution atmospheric hindcast for the whole Mediterranean Basin was performed within the EU-funded Hindcast of Dynamic Processes of the Ocean and Coastal Areas of Europe (HIPOCAS) Project. The long-term hindcasted data set, which comprises several atmospheric parameters at different levels, was produced by means of dynamical downscaling from the NCEP/NCAR global reanalysis using the atmospheric limited area model REMO. The REMO hindcast has been exhaustively validated. On that score, various hindcasted surface parameters, such as 10-m wind field, 2-m temperature and mean sea level pressure, have been compared to satellite data (ERS-1/2 scatterometer) and in-situ measurements from offshore stations. In addition, two ocean models...
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Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-3804.pdf
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Characterization of ASCAT measurements based on buoy and QuikSCAT wind vector observations ArchiMer
Bentamy, Abderrahim; Croize-fillon, Denis; Perigaud, C..
The new scatterometer Advanced SCATterometer (ASCAT) onboard MetOp-A satellite provides surface wind speed and direction over global ocean with a spatial resolution of 25 km square over two swaths of 550 km widths. The accuracy of ASCAT wind retrievals is determined through various comparisons with moored buoys. The comparisons indicate that the remotely sensed wind speeds and directions agree well with buoy data. The root-mean-squared differences of the wind speed and direction are less than 1.72 m/s and 18 degrees, respectively. At global scale, ASCAT winds are compared with surface winds derived from QuikSCAT scatterometer. The results confirm the buoy analyses, especially for wind speed ranging between 3 m/s and 20 m/s. For higher wind conditions....
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Ano: 2008 URL: http://archimer.ifremer.fr/doc/00004/11549/8149.pdf
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Compatibility of C- and Ku-band scatterometer winds: ERS-2 and QuikSCAT ArchiMer
Bentamy, Abderrahim; Grodsky, Semyon A.; Chapron, Bertrand; Carton, James A..
Global winds provided by satellite scatterometry are an important aspect of the ocean observing system. Many applications require well-calibrated time series of winds over time periods spanned by multiple missions. But sensors on individual satellites differ, introducing differences in wind estimates. This study focuses on global winds from two scatterometers, ERS-2 (1996-2001) and QuikSCAT (1999-2009) that show persistent differences during their period of overlap (July-1999 to January 2001). We examine a set of collocated observations during this period to evaluate the causes of these differences. The use of different operating frequencies leads to differences that depend on rain rate, wind velocity, and SST. The enhanced sensitivity to rain rate of the...
Tipo: Text Palavras-chave: Scatterometer winds; SST; Inter-instrument bias.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00139/25071/23190.pdf
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Copernicus Marine Service Ocean State Report ArchiMer
Von Schuckmann, Karina; Le Traon, Pierre-yves; Smith, Neville; Pascual, Ananda; Brasseur, Pierre; Fennel, Katja; Djavidnia, Samy; Aaboe, Signe; Alvarez Fanjul, Enrique; Autret, Emmanuelle; Axell, Lars; Aznar, Roland; Benincasa, Mario; Bentamy, Abderrahim; Boberg, Fredrik; Bourdalle-badie, Romain; Nardelli, Bruno Buongiorno; Brando, Vittorio E.; Bricaud, Clement; Breivik, Lars-anders; Brewin, Robert J. W.; Capet, Arthur; Ceschin, Adrien; Ciliberti, Stefania; Cossarini, Gianpiero; De Alfonso, Marta; De Pascual Collar, Alvaro; De Kloe, Jos; Deshayes, Julie; Desportes, Charles; Drevillon, Marie; Drillet, Yann; Droghei, Riccardo; Dubois, Clotilde; Embury, Owen; Etienne, Helene; Fratianni, Claudia; Garcia Lafuente, Jesus; Garcia Sotillo, Marcos; Garric, Gilles; Gasparin, Florent; Gerin, Riccardo; Good, Simon; Gourrion, Jerome; Gregoire, Marilaure; Greiner, Eric; Guinehut, Stephanie; Gutknecht, Elodie; Hernandez, Fabrice; Hernandez, Olga; Hoyer, Jacob; Jackson, Laura; Jandt, Simon; Josey, Simon; Juza, Melanie; Kennedy, John; Kokkini, Zoi; Korres, Gerasimos; Kouts, Mariliis; Lagemaa, Priidik; Lavergne, Thomas; Le Cann, Bernard; Legeais, Jean-francois; Lemieux-dudon, Benedicte; Levier, Bruno; Lien, Vidar; Maljutenko, Ilja; Manzano, Fernando; Marcos, Marta; Marinova, Veselka; Masina, Simona; Mauri, Elena; Mayer, Michael; Melet, Angelique; Melin, Frederic; Meyssignac, Benoit; Monier, Maeva; Muller, Malte; Mulet, Sandrine; Naranjo, Cristina; Notarstefano, Giulio; Paulmier, Aurelien; Perez Gomez, Begona; Perez Gonzalez, Irene; Peneva, Elisaveta; Perruche, Coralie; Peterson, K. Andrew; Pinardi, Nadia; Pisano, Andrea; Pardo, Silvia; Poulain, Pierre-marie; Raj, Roshin P.; Raudsepp, Urmas; Ravdas, Michaelis; Reid, Rebecca; Rio, Marie-hélène; Salon, Stefano; Samuelsen, Annette; Sammartino, Michela; Sammartino, Simone; Sando, Anne Britt; Santoleri, Rosalia; Sathyendranath, Shubha; She, Jun; Simoncelli, Simona; Solidoro, Cosimo; Stoffelen, Ad; Storto, Andrea; Szerkely, Tanguy; Tamm, Susanne; Tietsche, Steffen; Tinker, Jonathan; Tintore, Joaquin; Trindade, Ana; Van Zanten, Daphne; Vandenbulcke, Luc; Verhoef, Anton; Verbrugge, Nathalie; Viktorsson, Lena; Wakelin, Sarah L.; Zacharioudaki, Anna; Zuo, Hao.
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00601/71276/71010.pdf
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Copernicus Marine Service Ocean State Report, Issue 3 ArchiMer
Von Schuckmann, Karina; Le Traon, Pierre-yves; Smith, Neville; Pascual, Ananda; Djavidnia, Samuel; Gattuso, Jean-pierre; Grégoire, Marilaure; Nolan, Glenn; Aaboe, Signe; Aguiar, Eva; Álvarez Fanjul, Enrique; Alvera-azcárate, Aida; Aouf, Lotfi; Barciela, Rosa; Behrens, Arno; Belmonte Rivas, Maria; Ben Ismail, Sana; Bentamy, Abderrahim; Borgini, Mireno; Brando, Vittorio E.; Bensoussan, Nathaniel; Blauw, Anouk; Bryère, Philippe; Buongiorno Nardelli, Bruno; Caballero, Ainhoa; Çağlar Yumruktepe, Veli; Cebrian, Emma; Chiggiato, Jacopo; Clementi, Emanuela; Corgnati, Lorenzo; De Alfonso, Marta; De Pascual Collar, Álvaro; Deshayes, Julie; Di Lorenzo, Emanuele; Dominici, Jean-marie; Dupouy, Cécile; Drévillon, Marie; Echevin, Vincent; Eleveld, Marieke; Enserink, Lisette; García Sotillo, Marcos; Garnesson, Philippe; Garrabou, Joaquim; Garric, Gilles; Gasparin, Florent; Gayer, Gerhard; Gohin, Francis; Grandi, Alessandro; Griffa, Annalisa; Gourrion, Jerome; Hendricks, Stefan; Heuzé, Céline; Holland, Elisabeth; Iovino, Doroteaciro; Juza, Mélanie; Kurt Kersting, Diego; Kipson, Silvija; Kizilkaya, Zafer; Korres, Gerasimos; Kõuts, Mariliis; Lagemaa, Priidik; Lavergne, Thomas; Lavigne, Heloise; Ledoux, Jean-baptiste; Legeais, Jean Francois; Lehodey, Patrick; Linares, Cristina; Liu, Ye; Mader, Julien; Maljutenko, Ilja; Mangin, Antoine; Manso-narvarte, Ivan; Mantovani, Carlo; Markager, Stiig; Mason, Evan; Mignot, Alexandre; Menna, Milena; Monier, Maeva; Mourre, Baptiste; Müller, Malte; Nielsen, Jacob Woge; Notarstefano, Giulio; Ocaña, Oscar; Pascual, Ananda; Patti, Bernardo; Payne, Mark R.; Peirache, Marion; Pardo, Silvia; Pérez Gómez, Begoña; Pisano, Andrea; Perruche, Coralie; Peterson, K. Andrew; Pujol, Marie-isabelle; Raudsepp, Urmas; Ravdas, Michalis; Raj, Roshin P.; Renshaw, Richard; Reyes, Emma; Ricker, Robert; Rubio, Anna; Sammartino, Michela; Santoleri, Rosalia; Sathyendranath, Shubha; Schroeder, Katrin; She, Jun; Sparnocchia, Stefania; Staneva, Joanna; Stoffelen, Ad; Szekely, Tanguy; Tilstone, Gavin H.; Tinker, Jonathan; Tintoré, Joaquín; Tranchant, Benoît; Uiboupin, Rivo; Van Der Zande, Dimitry; Wood, Richard; Woge Nielsen, Jacob; Zabala, Mikel; Zacharioudaki, Anna; Zuberer, Frédéric; Zuo, Hao.
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00515/62637/67004.pdf
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Daily surface wind fields produced by merged satellite data ArchiMer
Bentamy, Abderrahim; Katsaros, Kb; Drennan, Wm; Forde, Eb.
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Ano: 2002 URL: http://archimer.ifremer.fr/doc/00000/10106/10171.pdf
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Data assembly and processing for operational oceanography 10 years of achievements ArchiMer
Le Traon, Pierre-yves; Larnicol, Gilles; Guinehut, Stephanie; Pouliquen, Sylvie; Bentamy, Abderrahim; Roemmich, Dean; Donlon, Craig; Roquet, Herve; Jacobs, Gregg; Griffin, David; Bonjean, Fabrice; Hoepffner, Nicolas; Breivik, Lars-anders.
Data assembly and processing centers are essential elements of the operational oceanography infrastructure. They provide data and products needed by modeling and data assimilation systems; they also provide products directly usable for applications. This paper discusses the role and functions of the data centers for operational oceanography. It describes some of the main data assembly centers (Argo and in situ data, altimetry, sea surface temperature) developed during the Global Ocean Data Assimilation Experiment. An overview of other data centers (wind and fluxes, ocean color, sea ice) is also given. Much progress has been achieved over the past 10 years to validate, intercalibrate, and merge altimeter data from multiple satellites. Accuracy and...
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Ano: 2009 URL: https://archimer.ifremer.fr/doc/2009/publication-6879.pdf
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Differences between two estimates of air-sea turbulent heat fluxes over the Atlantic Ocean ArchiMer
Santorelli, A.; Pinker, R. T.; Bentamy, Abderrahim; Katsaros, Kristina; Drennan, W. M.; Mestas-nunez, A. M.; Carton, J. A..
Uncertainties in turbulent ocean-atmosphere heat flux estimates, both among the estimates and between them and ground truth, suggest that further comparisons are needed. We analyze estimates from the French Research Institute for Exploitation of the Sea (IFREMER) and the Woods Hole Oceanographic Institution's Objectively Analyzed air-sea Fluxes (WHOI OAFlux). The IFREMER products are based on satellite observations and the WHOI OAFlux ones on data from satellites, buoys, and ships assimilated into numerical analyses. We focus on the Atlantic sector (70 degrees W-30 degrees E, 45 degrees S-45 degrees N) during 1996-2005, where the variables that enter the bulk formulae for computing fluxes (wind speed, sea surface and air temperature, and specific humidity)...
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Ano: 2011 URL: http://archimer.ifremer.fr/doc/00048/15915/13344.pdf
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Does direct impact of SST on short wind waves matter for scatterometry? ArchiMer
Grodsky, Semyon A.; Kudryavtsev, Vladimir N.; Bentamy, Abderrahim; Carton, James A.; Chapron, Bertrand.
Scatterometer radar backscatter depends on the relationship linking surface stress and surface roughness. SST can alter the growth rate of centimeter-scale waves through its impact on air and water density and water viscosity. This SST-dependency has not been included in the standard Geophysical Model Functions. This study uses a radar imaging model to evaluate this SST-dependence and compares the results to observations from QuikScat Ku-band and ASCAT C-band scatterometers. A SST correction could raise wind speeds by up to 0.2 ms(-1) in the storm track region of the Southern Ocean for C-band scatterometers. For the higher frequency Ku-band scatterometers, a SST-induced reduction up to 0.4 ms(-1) is predicted south of 60(-S), where SST is cold and winds...
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Ano: 2012 URL: https://archimer.ifremer.fr/doc/00088/19898/17552.pdf
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Estimates of net heat fluxes over the Atlantic Ocean ArchiMer
Pinker, R. T.; Bentamy, Abderrahim; Katsaros, Kristina; Ma, Y.; Li, C..
Many studies have been undertaken to evaluate turbulent heat fluxes at the ocean-atmosphere interface; less was done on the total net heat flux. We will compare heat budgets at the ocean-atmosphere interface as derived from satellites and from blended products, compare them to in situ observations, identify the location of largest differences, and attempt to explain reasons for these differences. The results over the Atlantic Sector (50 degrees S-50 degrees N) for a 3 year period show that differences in the turbulent fluxes among two widely used approaches are overshadowed by differences in the radiative fluxes. While the maximum difference in sensible and latent heat fluxes can be about 30 W/m(2), the mean values for latent heat fluxes are -2.27 W/m(2)...
Tipo: Text Palavras-chave: Oceanic heat fluxes; Oceanic net heat fluxes; Ocean-atmosphere interface.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00186/29713/28119.pdf
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Evaluation of high-resolution surface wind products at global and regional scales ArchiMer
Bentamy, Abderrahim; Croize-fillon, Denis; Queffeulou, Pierre; Liu, C.; Roquet, H..
High resolution surface wind fields covering the global ocean, estimated from remotely sensed wind data and ECMWF wind analyses, have been available since 2005 with a spatial resolution of 0.25 degrees in longitude and latitude, and a temporal resolution of 6h. Their quality is investigated through various comparisons with surface wind vectors from 190 buoys moored in various oceanic basins, from research vessels and from QuikSCAT scatterometer data taken during 2005-2006. The NCEP/NCAR and NCDC blended wind products are also considered. The comparisons performed during January-December 2005 show that speeds and directions compare well to in-situ observations, including from moored buoys and ships, as well as to the remotely sensed data. The...
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Ano: 2009 URL: http://archimer.ifremer.fr/doc/00004/11546/10549.pdf
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From Observation to Information and Users: The Copernicus Marine Service Perspective ArchiMer
Le Traon, Pierre-yves; Reppucci, Antonio; Alvarez Fanjul, Enrique; Aouf, Lotfi; Behrens, Arno; Belmonte, Maria; Bentamy, Abderrahim; Bertino, Laurent; Brando, Vittorio Ernesto; Kreiner, Matilde Brandt; Benkiran, Mounir; Carval, Thierry; Ciliberti, Stefania A.; Claustre, Hervé; Clementi, Emanuela; Coppini, Giovanni; Cossarini, Gianpiero; De Alfonso Alonso-muñoyerro, Marta; Delamarche, Anne; Dibarboure, Gerald; Dinessen, Frode; Drevillon, Marie; Drillet, Yann; Faugere, Yannice; Fernández, Vicente; Fleming, Andrew; Garcia-hermosa, M. Isabel; Sotillo, Marcos García; Garric, Gilles; Gasparin, Florent; Giordan, Cedric; Gehlen, Marion; Gregoire, Marilaure L.; Guinehut, Stephanie; Hamon, Michel; Harris, Chris; Hernandez, Fabrice; Hinkler, Jørgen B.; Hoyer, Jacob; Karvonen, Juha; Kay, Susan; King, Robert; Lavergne, Thomas; Lemieux-dudon, Benedicte; Lima, Leonardo; Mao, Chongyuan; Martin, Matthew J; Masina, Simona; Melet, Angelique; Buongiorno Nardelli, Bruno; Nolan, Glenn; Pascual, Ananda; Pistoia, Jenny; Palazov, Atanas; Piolle, Jean-francois; Pujol, Marie Isabelle; Pequignet, Anne Christine; Peneva, Elisaveta; Pérez Gómez, Begoña; Petit De La Villeon, Loic; Pinardi, Nadia; Pisano, Andrea; Pouliquen, Sylvie; Reid, Rebecca; Remy, Elisabeth; Santoleri, Rosalia; Siddorn, John; She, Jun; Staneva, Joanna; Stoffelen, Ad; Tonani, Marina; Vandenbulcke, Luc; Von Schuckmann, Karina; Volpe, Gianluca; Wettre, Cecilie; Zacharioudaki, Anna.
The Copernicus Marine Environment Monitoring Service (CMEMS) provides regular and systematic reference information on the physical and biogeochemical ocean and sea-ice state for the global ocean and the European regional seas. CMEMS serves a wide range of users (more than 15,000 users are now registered to the service) and applications. Observations are a fundamental pillar of the CMEMS value-added chain that goes from observation to information and users. Observations are used by CMEMS Thematic Assembly Centres (TACs) to derive high-level data products and by CMEMS Monitoring and Forecasting Centres (MFCs) to validate and constrain their global and regional ocean analysis and forecasting systems. This paper presents an overview of CMEMS, its evolution,...
Tipo: Text Palavras-chave: Ocean; Observing systems; Satellite; In situ; Data assimilation; Services.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00498/60983/64389.pdf
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Fuzzy Logic Applied to Track Generation Areas of Swell Systems Observed by SAR ArchiMer
De Farias, Eduardo G. G.; Lorenzzetti, Joao A.; Bentamy, Abderrahim; Chapron, Bertrand; Romain, Husson.
Recently, with the availability of a great number of synthetic aperture radar (SAR) wave mode spectra, it has been possible to derive a set of great circle lines of swell propagation whose intersection points indicate the position of the storm generating the observed swell field. However, due to the inherent limitations of SAR spectra, the locus of convergence of great circle of swell propagation can be sometimes diffuse or contain multiple convergence regions. In this letter, we adapted the fuzzy cluster logic method to identify the regions of convergence of SAR wave field rays. The analysis of the results of the fuzzy algorithm clearly indicates the ability of this statistical method to identify the cluster center region of swell fields observed in SAR...
Tipo: Text Palavras-chave: Swell wave fields and fuzzy logic; Synthetic aperture radar (SAR).
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00109/21992/20637.pdf
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Gridded surface wind fields from Metop/ASCAT measurements ArchiMer
Bentamy, Abderrahim; Croize-fillon, Denis.
This article deals with the calculation and validation of daily surface wind vector fields from wind speed and direction observations derived from Advanced SCATterometer (ASCAT) scatterometer measurements over the global ocean. According to the ASCAT sampling scheme, the objective method allowing for the determination of regular in space and time wind speed and direction fields uses ASCAT observations as well as European Centre for Medium Weather Forecasts (ECMWF) analyses. The latter are considered as external drift for the kriging method and as the temporal interpolation basis for ASCAT retrievals. This study focuses on the investigation of the capability of the method to add valuable wind information to the operational atmospheric analyses and on the...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00043/15440/12808.pdf
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Homogenization of scatterometer wind retrievals ArchiMer
Bentamy, Abderrahim; Grodsky, Semyon A.; Elyouncha, Anis; Chapron, Bertrand; Desbiolles, Fabien.
Surface winds (10 m equivalent neutral wind velocity) from scatterometer missions since 1992 to present require homogenization to meet the requirements for oceanic and atmospheric climate data records. Sources of differences between winds retrieved from different scatterometer measurements mainly arise from calibration/validation procedures used for each scatterometer and differences in measurement physics. In this study, we focus on the calibration/validation component of the European Remote Sensing Satellite (ERS)-1 and ERS-2 wind speed biases. ERS-1 and ERS-2 data, named as WNF products, are from the Institut Français de Recherche pour l'Exploitation de la MER (IFREMER). In addition to WNF data, the newly calibrated ERS-2 products provided by the...
Tipo: Text Palavras-chave: Scatterometer; Surface wind; Homogenization.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00334/44536/44468.pdf
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Improved near real time surface wind resolution over the Mediterranean Sea ArchiMer
Bentamy, Abderrahim; Ayina, Ludos-herve; Queffeulou, Pierre; Croize-fillon, Denis; Kerbaol, Vincent.
Several scientific programs, including the Mediterranean Forecasting System Toward Environmental Predictions (MFSTEP project), request high space and time resolutions of surface wind speed and direction. The purpose of this paper is to focus on surface wind improvements over the global Mediterranean Sea, based on the blending near real time remotely sensed wind observations and ECMWF wind analysis. Ocean surface wind observations are retrieved from QuikSCAT scatterometer and from SSM/I radiometers available at near real time at Meteo-France. Using synchronous satellite data, the number of remotely sensed data available for each analysis epoch ( 00: 00 h; 06: 00 h; 12: 00 h; 18: 00 h) is not uniformly distributed as a function of space and time. On average...
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Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3528.pdf
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Improvement in airsea flux estimates derived from satellite observations ArchiMer
Bentamy, Abderrahim; Grodsky, Semyon A.; Katsaros, Kristina; Mestas-nunez, Alberto M.; Blanke, Bruno; Desbiolles, Fabien.
A new method is developed to estimate daily turbulent airsea fluxes over the global ocean on a 0.25 degrees grid. The required surface wind speed (w(10)) and specific air humidity (q(10)) at 10m height are both estimated from remotely sensed measurements. w(10) is obtained from the SeaWinds scatterometer on board the QuikSCAT satellite. A new empirical model relating brightness temperatures (T-b) from the Special Sensor Microwave Imager (SSM/I) and q(10) is developed. It is an extension of the author's previous q(10) model. In addition to T-b, the empirical model includes sea surface temperature (SST) and airsea temperature difference data. The calibration of the new empirical q(10) model utilizes q(10) from the latest version of the National Oceanography...
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00137/24825/23575.pdf
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Matching ASCAT and QuikSCAT winds ArchiMer
Bentamy, Abderrahim; Grodsky, Semyon A.; Carton, James A.; Croize-fillon, Denis; Chapron, Bertrand.
Surface winds from two scatterometers, the Advanced scatterometer (ASCAT), available since 2007, and QuikSCAT, which was available through November 2009, show persistent differences during their period of overlap. This study examines a set of collocated observations during a 13-month period November 2008 through November 2009, to evaluate the causes of these differences. A difference in the operating frequency of the scatterometers leads to differences that this study argues depend on rain rate, wind velocity, and SST. The impact of rainfall on the higher frequency QuikSCAT introduces biases of up to 1 m s(-1) in the tropical convergence zones and along the western boundary currents even after rain flagging is applied. This difference from ASCAT is reduced...
Tipo: Text
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00070/18126/15691.pdf
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Modeling the structure and variability of the southern Benguela upwelling using QuikSCAT wind forcing - art. no. C07018 ArchiMer
Blanke, Bruno; Speich, Sabrina; Bentamy, Abderrahim; Roy, Claude; Sow, Bamol.
The structure and patterns of variability of the southern Benguela coastal upwelling system are investigated with a high-resolution regional model forced by QuikSCAT winds over 1999-2003. The relevance of this global wind product is tested, at first, for the specific nearshore southeast Atlantic; then, the wind products are spatially or temporally degraded from the original 0.5 degrees daily fluxes and are used to diagnose the main scales of the surface dynamical forcing variability. Time resolution appears as a crucial factor in the wind stress to retrieve the patterns of interannual anomalies in sea surface temperatures in a good agreement with independent NASA Pathfinder observations. Various upwelling indices are also calculated in the model to study...
Tipo: Text Palavras-chave: High resolution model; Ai sea interaction; Coastal upwelling.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-768.pdf
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Origin of fine-scale wind stress curl structures in the Benguela and Canary upwelling systems ArchiMer
Desbiolles, Fabien; Blanke, Bruno; Bentamy, Abderrahim; Grima, Nicolas.
Numerous studies have shown the primary importance of wind stress curl in coastal upwelling dynamics. The main goal of this new analysis is to describe the QuikSCAT surface wind stress curl at various scales in the Benguela and Canary upwelling systems. The dominant spatial pattern is characterized by cyclonic curl near continental boundaries and anticyclonic curl offshore, in association with equatorward alongshore (upwelling favorable) wind stress. At a smaller scale, we demonstrate the sensitivity of the QuikSCAT wind stress curl to coastal processes related to sea surface temperature (SST) mesoscale fluctuations by presenting a linear relationship between the curl and crosswind SST gradients. Despite the spatial and temporal sensitivity of the...
Tipo: Text Palavras-chave: Wind stress; Upwelling; SST-wind interactions.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00233/34412/32820.pdf
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