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A Long-Lasting Mode Water Vortex in the Northeast Atlantic Ocean ArchiMer
Reverdin, Gilles; Gascard, Jean-claude; Le Cann, Bernard; Prieur, Loic; Assenbaum, Michel; Lherminier, Pascale.
An anticyclonic mode water vortex and its environment were investigated from November 2000 to September 2001 in the northeast Atlantic (near 43.5 degrees N, 15 degrees-19 degrees W) with neutrally buoyant drifting floats, moored current meters, satellite altimetric sea surface height, and several hydrological surveys and sections. These observations reveal a coherent inner core (similar to 0 km in diameter) made of very oxygenated northeast Atlantic central waters (11 degrees-12.7 degrees C and 35.5-35.7 on the 1978 practical salinity scale) from 150 m down to about 750-m depth. The core presents high relative vorticity (up to approximately -0.5 times the Coriolis frequency f) within at least 10 km of its center, near 400-700 m. Peak velocity along the...
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Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6357.pdf
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A New Platform for the Determination of Air–Sea Fluxes (OCARINA): Overview and First Results ArchiMer
Bourras, D.; Branger, H.; Reverdin, Gilles; Marie, Louis; Cambra, R.; Baggio, L.; Caudoux, C.; Caudal, G.; Morisset, S.; Geyskens, N.; Weill, Alain; Hauser, D..
The present paper describes a new type of floating platform that was specifically designed for estimating air–sea fluxes, investigating turbulence characteristics in the atmospheric surface boundary layer, and studying wind–wave interactions. With its design, it can be deployed in the open ocean or in shallow-water areas. The system is designed to be used from a research vessel. It can operate for ~10 h as a drifting wave rider and 3 h under power. Turbulence and meteorological instrument packages are placed at a low altitude (1–1.5 m). It was deployed for validation purposes during the Front de Marée, Variabilité (FROMVAR), 2011 experiment off the west coast of Brittany, France. Wind friction velocity and surface turbulent buoyancy flux were estimated...
Tipo: Text Palavras-chave: In situ atmospheric observations; Surface observations; In situ oceanic observations.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00192/30283/28759.pdf
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Air-Sea Turbulent Fluxes From a Wave-Following Platform During Six Experiments at Sea ArchiMer
Bourras, Denis; Cambra, Remi; Marié, Louis; Bouin, Marie-noëlle; Baggio, Lucio; Branger, Hubert; Beghoura, Houda; Reverdin, Gilles; Dewitte, Boris; Paulmier, Aurélien; Maes, Christophe; Ardhuin, Fabrice; Pairaud, Ivane; Fraunié, Philippe; Luneau, Christopher; Hauser, Danièle.
Turbulent fluxes at the air‐sea interface are estimated with data collected in 2011 to 2017 with a low‐profile platform during six experiments in four regions. The observations were carried out with moderate winds (2‐10 m s‐1) and averaged wave heights of 1.5 m. Most of the time, there was a swell, with an averaged wave age (the ratio between wave phase speed and wind speed) being equal to 2.8±1.6. Three flux calculation methods are used, namely the eddy‐covariance (EC), the inertial‐dissipation (ID), and the bulk methods. For the EC method, a spectral technique is proposed to correct wind data from platform motion. A mean bias affecting the friction velocity (u*) is then evaluated. The comparison between EC u* and ID u* estimates suggests that a constant...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00503/61436/65156.pdf
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Collecting and gridding complementary in-situ SST/SSS data for the calibration and validation of SMOS ArchiMer
Brion, Emilie; Gaillard, Fabienne; Petit De La Villeon, Loic; Delcroix, Thierry; Alory, Gael; Reverdin, Gilles.
Providing reliable in-situ surface temperature and salinity data over the global ocean within short delay is critical for the calibration and validation of the recently launched Soil Moisture and Ocean Salinity Satellite (SMOS). The work presented here has been undertaken as a contribution to GLOSCAL (Global Ocean Surface Salinity Calibration and Validation), retained as one of the ESA CalVal Projects. Based on the Coriolis datasets and using In Situ Analysis System (ISAS) tool, a near real time analysis system has been developed. It provides gridded fields of sea surface salinity and temperature and the corresponding in-situ dataset. In addition to research activities, these products would be used to help the quality control of SMOS satellite data, and to...
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Ano: 2011 URL: http://archimer.ifremer.fr/doc/00114/22548/20229.pdf
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Contribution to the ICES Report on Ocean Climate : North Atlantic Ocean in 2017 ArchiMer
Kolodziejczyk, Nicolas; Reverdin, Gilles; Desbruyeres, Damien.
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00481/59296/61988.pdf
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Contribution to the ICES Working Group on Ocean Hydrography. National report: France. 2013 ArchiMer
Gaillard, Fabienne; Reverdin, Gilles; Morin, Pascal.
Annual report on the hydrological conditions of the North Atlantic in 2012: 1) General conditions deduced from the analyzed fields ISAS based on ARGO floats data; 2) Ships of opportunity along 60°N; 3) South Western Channel time series.
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00134/24509/22537.pdf
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Contribution to the ICES Working Group on Oceanic Hydrography. National report: France, April 2017 ArchiMer
Kolodziejczyk, Nicolas; Gaillard, Fabienne; Reverdin, Gilles; Cariou, T; Bozec, Y; Morin, Pascal.
Tipo: Text
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00391/50260/50887.pdf
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Contribution to the ICES Working Group on Oceanic Hydrography. National report: France, June 2016 ArchiMer
Kolodziejczyk, Nicolas; Gaillard, Fabienne; Reverdin, Gilles; Cariou, T; Bozec, Y; Morin, Pascal.
This report is the national French contribution to the ICES Working Group on Ocean Hydrography (WGOH) description of th North Atlantic condition during 2015.
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45273/44736.pdf
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CORA 5.0: Global in situ temperature and salinity dataset ArchiMer
Szekely, Tanguy; Gourrion, Jerome; Pouliquen, Sylvie; Reverdin, Gilles.
Tipo: Text
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00450/56160/57703.pdf
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CORIOLIS. Rapport d’activités 2016 ArchiMer
Pouliquen, Sylvie; Maze, Guillaume; Lebreton, Nathanaele; D'Ortenzio, Fabrizio; Alory, Gaël; Delcroix, Thierry; Bourles, Bernard; Blouch, Pierre; Guinet, Christophe; Gouriou, Yves; Gaillard, Fabienne; Heyndrickx, Céline; Le Menn, Marc; Testor, Pierre; Donato, Vincent; Charria, Guillaume; Carval, Thierry; Reverdin, Gilles; Emzivat, Gilbert.
Rapport d'activité Coriolis pour l'année 2016 dans le cadre de la convention cadre Coriolis 2014-2020
Tipo: Text
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00388/49970/50562.pdf
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Data Descriptor: Stable isotopes in the atmospheric marine boundary layer water vapour over the Atlantic Ocean, 2012-2015 ArchiMer
Benetti, Marion; Steen-larsen, Hans Christian; Reverdin, Gilles; Sveinbjornsdottir, Arny Erla; Aloisi, Giovanni; Berkelhammer, Max B.; Bourles, Bernard; Bourras, Denis; De Coetlogon, Gaelle; Cosgrove, Ann; Faber, Anne-katrine; Grelet, Jacques; Hansen, Steffen Bo; Johnson, Rod; Legoff, Herve; Martin, Nicolas; Peters, Andrew J.; Popp, Trevor James; Reynaud, Thierry; Winther, Malte.
The water vapour isotopic composition ( (H2O)-H-1-O-16, (H2O)-O-18 and (HHO)-H-1-H-2-O-16) of the Atlantic marine boundary layer has been measured from 5 research vessels between 2012 and 2015. Using laser spectroscopy analysers, measurements have been carried out continuously on samples collected 10-20 meter above sea level. All the datasets have been carefully calibrated against the international VSMOW-SLAP scale following the same protocol to build a homogeneous dataset covering the Atlantic Ocean between 4 degrees S to 63 degrees N. In addition, standard meteorological variables have been measured continuously, including sea surface temperatures using calibrated Thermo-Salinograph for most cruises. All calibrated observations are provided with...
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Ano: 2017 URL: https://archimer.ifremer.fr/doc/00371/48195/48312.pdf
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Deep Currents in the Rift Valley of the North Mid-Atlantic Ridge ArchiMer
Lahaye, Noe; Gula, Jonathan; Thurnherr, Andreas M.; Reverdin, Gilles; Bouruet-aubertot, Pascale; Roullet, Guillaume.
Over mid-ocean ridges, the interaction between the currents and the topography gives rise to complex flows, which drive the transport properties of biogeochemical constituents, and especially those associated with hydrothermal vents, thus impacting associated ecosystems. This paper describes the circulation in the rift valley along the Azores sector of the North Mid-Atlantic Ridge, using a combination of in-situ data from several surveys and realistic high-resolution modeling. It confirms the presence of a mean deep current with an up-valley branch intensified along the right inner flank of the valley (looking downstream), and a weaker down-valley branch flowing at shallower depth along the opposite flank. The hydrographic properties of the rift-valley...
Tipo: Text Palavras-chave: Deep currents; Transport; Deep turbulence; Internal waves and tides; Realistic modeling; In situ observation.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00584/69630/67486.pdf
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Dissolved iron in the North Atlantic Ocean and Labrador Sea along the GEOVIDE section (GEOTRACES section GA01) ArchiMer
Tonnard, Manon; Planquette, Hélène; Bowie, Andrew R.; Van Der Merwe, Pier; Gallinari, Morgane; Desprez De Gésincourt, Floriane; Germain, Yoan; Gourain, Arthur; Benetti, Marion; Reverdin, Gilles; Tréguer, Paul; Boutorh, Julia; Cheize, Marie; Menzel Barraqueta, Jan-lukas; Pereira-contreira, Leonardo; Shelley, Rachel; Lherminier, Pascale; Sarthou, Géraldine.
Dissolved Fe (DFe) samples from the GEOVIDE voyage (GEOTRACES GA01, May–June 2014) in the North Atlantic Ocean were analysed using a SeaFAST-picoTM coupled to an Element XR HR-ICP-MS and provided interesting insights on the Fe sources in this area. Overall, DFe concentrations ranged from 0.09 ± 0.01 nmol L−1 to 7.8 ± 0.5 nmol L−1. Elevated DFe concentrations were observed above the Iberian, Greenland and Newfoundland Margins likely due to riverine inputs from the Tagus River, meteoric water inputs and sedimentary inputs. Air-sea interactions were suspected to be responsible for the increase in DFe concentrations within subsurface waters of the Irminger Sea due to deep convection occurring the previous winter, that provided iron-to-nitrate ratios sufficient...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00441/55233/56714.pdf
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EMSO-Azores : Monitoring seafloor and water column processes at the Mid-Atlantic Ridge ArchiMer
Cannat, Mathilde; Sarradin, Pierre-marie; Blandin, Jerome; Ballu, Valérie; Barreyre, Thibaut; Chavagnac, Valérie; Colaco, Ana; Crawford, Wayne; Daniel, Romuald; Escartin, Javier; Legrand, Julien; Matabos, Marjolaine; Rommevaux, Céline; Roullet, Guillaume; Reverdin, Gilles; Sarrazin, Jozee.
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00353/46444/46194.pdf
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Enhanced Turbulence Associated with the Diurnal Jet in the Ocean Surface Boundary Layer ArchiMer
Sutherland, Graig; Marie, Louis; Reverdin, Gilles; Christensen, Kai H.; Brostrtom, Goran; Ward, Brian.
Detailed observations of the diurnal jet, a surface intensification of the wind-driven current associated with the diurnal cycle of sea surface temperature (SST), were obtained during August and September 2012 in the subtropical Atlantic. Adiurnal increase in SST of 0.2 degrees to 0.5 degrees C was observed, which corresponded to a diurnal jet of 0.15 m s(-1). The increase in near-surface stratification limits the vertical diffusion of the wind stress, which in turn increases the near-surface shear. While the stratification decreased the turbulent dissipation rate epsilon below the depth of the diurnal jet, there was an observed increase in epsilon within the diurnal jet. The diurnal jet was observed to increase the near-surface shear by a factor of 5,...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00358/46872/46758.pdf
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Expanding Tara Oceans Protocols for Underway, Ecosystemic Sampling of the Ocean-Atmosphere Interface During Tara Pacific Expedition (2016-2018) ArchiMer
Gorsky, Gabriel; Bourdin, Guillaume; Lombard, Fabien; Pedrotti, Maria Luiza; Audrain, Samuel; Bin, Nicolas; Boss, Emmanuel; Bowler, Chris; Cassar, Nicolas; Caudan, Loic; Chabot, Genevieve; Cohen, Natalie R.; Cron, Daniel; De Vargas, Colomban; Dolan, John R.; Douville, Eric; Elineau, Amanda; Flores, J. Michel; Ghiglione, Jean Francois; Haentjens, Nils; Hertau, Martin; John, Seth G.; Kelly, Rachel L.; Koren, Ilan; Lin, Yajuan; Marie, Dominique; Moulin, Clementine; Moucherie, Yohann; Pesant, Stephane; Picheral, Marc; Poulain, Julie; Pujo-pay, Mireille; Reverdin, Gilles; Romac, Sarah; Sullivan, Mathew B.; Trainic, Miri; Tressol, Marc; Trouble, Romain; Vardi, Assaf; Voolstra, Christian R.; Wincker, Patrick; Agostini, Sylvain; Banaigs, Bernard; Boissin, Emilie; Forcioli, Didier; Furla, Paola; Galand, Pierre E.; Gilson, Eric; Reynaud, Stephanie; Sunagawa, Shinichi; Thomas, Olivier P.; Thurber, Rebecca Lisette Vega; Zoccola, Didier; Planes, Serge; Allemand, Denis; Karsenti, Eric; Planes, S.; Banaig, B.; Boissin, E.; Iwankow, G.; Allemand, D.; Zoccola, D.; Reynaud, S.; Beraud, E.; Djerbi, N.; Forcioli, D.; Furla, P.; Gilson, E.; Mcmind, R.; Ottaviani, A.; Rottinger, E.; Rouan, A.; Zamoum, T.; Flume, B. C. C.; Pogoreutz, C.; Voolstra, C. R.; Rothig, T.; Ziegler, M.; Paoli, L.; Ruscheweyh, H-j; Salazar, G.; Sunagawa, S.; Flores, J. M.; Koren, I; Trainic, M.; Lang-yona, N.; Vardi, A.; Conan, P.; Ghiglione, J-f; Pujo-pay, M.; Galand, P. E.; Hochart, C.; Audrain, S.; Bourgois, E.; Hertau, M.; Lancelot, J.; Monmarche, D.; Moulin, C.; Moucherie, Y.; Trouble, R.; Boss, E.; Bourdin, G.; Haentjens, N.; Karp-boss, L.; Douville, Eric; Agostini, S.; Mitsuhashi, G.; Kitano, Y.; Da Silva, O.; Dolan, J. R.; Gorsky, G.; Lemee, R.; Lombard, F.; Pedrotti, M-l; Cronin, D.; Sullivan, M.; Armstrong, E.; Aury, J-m; Barbe, V; Belser, C.; Carradec, Q.; Labadie, K.; Le-hoang, J.; Noel, B.; Poulain, J.; Wincker, P.; Klinges, G.; Vega-thunder, R.; Bonnival, E.; De Vargas, C.; Henry, N.; Marie, D.; Romac, S.; Pesant, S.; Miguel-gorda, M.; Thomas, O. P.; Bowler, C.; Friedrich, R.; Cassar, N.; Lin, Y.; John, S. G.; Kelly, R. L.; Cohen, N. R.; Reverdin, G.; Filee, J..
Interactions between the ocean and the atmosphere occur at the air-sea interface through the transfer of momentum, heat, gases and particulate matter, and through the impact of the upper-ocean biology on the composition and radiative properties of this boundary layer. The Tara Pacific expedition, launched in May 2016 aboard the schooner Tara, was a 29-month exploration with the dual goals to study the ecology of reef ecosystems along ecological gradients in the Pacific Ocean and to assess inter-island and open ocean surface plankton and neuston community structures. In addition, key atmospheric properties were measured to study links between the two boundary layer properties. A major challenge for the open ocean sampling was the lack of ship-time available...
Tipo: Text Palavras-chave: Neuston/plankton genomics/taxonomy/imaging; Aerosols; NCP; IOP; Trace metals; Microplastic.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00599/71083/69390.pdf
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Expédition OceanoScientific 2016-2017 : Etudes des mesures de température et de salinité de surface ArchiMer
Reynaud, Thierry; Reverdin, Gilles; Metzl, Nicolas; Griboval, Yvan.
The OceanoScientific Programm was initiated in 2006 and yielded the creation of a specific equipment : the OSC-System. The OSC-System measures physical parameters at the air-sea interface including Sea Surface temperature and Salinity. An OSC-System was installed on board of the OceanoScientific Explorer Boogaloo sailing ship. A cruise around the world was initiated the 17/11/2016 and ended 02/06/2017 including 60 days south of 40°S. Sea Surface temperature and salinity collected along this cruise are discussed in this technical report.
Tipo: Text Palavras-chave: Mesures; Température; Salinité; Surface; Oceanoscientific; Boogaloo; Antarctique; Temperature; Salinity; SST; SSS; Measurements; Antarctic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00472/58356/60914.pdf
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Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and-2 ArchiMer
Ducet, N; Le Traon, Pierre-yves; Reverdin, Gilles.
This study focuses on the improved estimation of mesoscale surface ocean circulation obtained by merging TOPEX/Poseidon (T/P) and ERS-1 and -2 altimeter measurements between October 1992 and May 1998. Once carefully intercalibrated and homogenized, these data are merged through an advanced global objective analysis method that allows us to correct for residual long wavelength errors and uses realistic correlation scales of ocean dynamics, The high-resolution (0.25 degrees x 0.25 degrees) merged T/P + ERS-1 and -2 sea level anomaly maps provide more homogeneous and reduced mapping errors than either individual data set and more realistic sea level and geostrophic velocity statistics than T/P data alone. Furthermore, the merged T/P + ERS-1 and -2 maps yield...
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Ano: 2000 URL: http://archimer.ifremer.fr/doc/00079/19033/16617.pdf
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Haline hurricane wake in the Amazon/Orinoco plume: AQUARIUS/SACD and SMOS observations ArchiMer
Grodsky, Semyon A.; Reul, Nicolas; Lagerloef, Gary; Reverdin, Gilles; Carton, James A.; Chapron, Bertrand; Quilfen, Yves; Kudryavtsev, Vladimir N.; Kao, Hsun-ying.
At its seasonal peak the Amazon/Orinoco plume covers a region of 10^6 km2 in the western tropical Atlantic with more than 1m of extra freshwater, creating a near-surface barrier layer (BL) that inhibits mixing and warms the sea surface temperature (SST) to >29oC. Here new sea surface salinity (SSS) observations from the Aquarius/SACD and SMOS satellites help elucidate the ocean response to hurricane Katia, which crossed the plume in early fall, 2011. Its passage left a 1.5psu high haline wake covering >10^5 km2 (in its impact on density, the equivalent of a 3.5oC cooling) due to mixing of the shallow BL. Destruction of this BL apparently decreased SST cooling in the plume, and thus preserved higher SST and evaporation than outside. Combined with SST,...
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Ano: 2012 URL: https://archimer.ifremer.fr/doc/00094/20540/18943.pdf
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Interannual Variability of the Mixed Layer Winter Convection and Spice Injection in the Eastern Subtropical North Atlantic ArchiMer
Kolodziejczyk, Nicolas; Reverdin, Gilles; Lazar, Alban.
The Argo dataset is used to study the winter upper-ocean conditions in the northeastern subtropical (NEA) Atlantic during 2006-12. During late winter 2010, the mixed layer depth is abnormally shallow and a negative anomaly of density-compensated salinity, the so-called spiciness, is generated in the permanent pycnocline. This is primarily explained by unusual weak air-sea buoyancy flux during the late winter 2010, in contrast with the five other studied winters. Particularly deep mixed layers and strong spiciness anomalies are observed during late winter 2012. The 2010 winter conditions appear to be related to historically low North Atlantic Oscillation (NAO) and high tropical North Atlantic index (TNA). Interannual variability of the eastern subtropical...
Tipo: Text
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00624/73566/73010.pdf
Registros recuperados: 44
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