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Registros recuperados: 11
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Calibration of CTD oxygen data collected in the Coral Sea during the 2012 BIFURCATION Cruise ArchiMer
Saout Grit, Carole; Ganachaud, Alexandre; Maes, Christophe; Finot, L; Jamet, L; Baurand, Francois; Grelet, Jacques.
An updated procedure for a CTD-oxygen calibration along with new data processing was applied to recent hydrographic cruise data in the Coral Sea during the Cruise “BIFURCATION” in September 2012. After a brief introduction with the scientific context (section 1), we describe the contents and acquisition models of hydrological and chemical data that are used for the calibration (section 2), the post-cruise calibration method (section 3) and the calibration results (section 4).
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00272/38321/36562.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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French PIRATA cruises S-ADCP data processing ArchiMer
Herbert, Gaelle; Kermabon, Catherine; Grelet, Jacques; Bourles, Bernard.
In the framework of the PIRATA program, several types of observations are carried out in the Tropical Atlantic during yearly cruises, including Shipboard Acoustic Doppler Current Profilers (SADCP) data. The present note is a brief review of the SADCP data processing methodology applied for 8 PIRATA cruises by using CASCADE software. To illustrate the processing steps and demonstrate the CASCADE software capabilities, an example of SADCP data processing obtained from PIRATA-FR24 cruise has been shown. This data set is made available on the PIRATA website and will also be used in the framework of the EU PREFACE program (see http://preface.b.uib.no/).
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00272/38320/36561.pdf
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From In Situ to satellite observations of pelagic Sargassum distribution and aggregation in the Tropical North Atlantic Ocean ArchiMer
Ody, Anouck; Thibaut, Thierry; Berline, Léo; Changeux, Thomas; André, Jean-michel; Chevalier, Cristèle; Blanfuné, Aurélie; Blanchot, Jean; Ruitton, Sandrine; Stiger-pouvreau, Valerie; Connan, Solène; Grelet, Jacques; Aurelle, Didier; Guéné, Mathilde; Bataille, Hubert; Bachelier, Celine; Guillemain, Dorian; Schmidt, Natascha; Fauvelle, Vincent; Guasco, Sophie; Ménard, Frédéric.
The present study reports on observations carried out in the Tropical North Atlantic in summer and autumn 2017, documenting Sargassum aggregations using both ship-deck observations and satellite sensor observations at three resolutions (MSI-10 m, OLCI-300 m, VIIRS-750 m and MODIS-1 km). Both datasets reported that in summer, Sargassum aggregations were mainly observed off Brazil and near the Caribbean Islands, while they accumulated near the African coast in autumn. Based on in situ observations, we propose a five-class typology allowing standardisation of the description of in situ Sargassum raft shapes and sizes. The most commonly observed Sargassum raft type was windrows, but large rafts composed of a quasi-circular patch hundreds of meters wide were...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00514/62609/66969.pdf
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Modulation of the vertical particle transfer efficiency in the oxygen minimum zone off Peru ArchiMer
Bretagnon, Marine; Paulmier, Aurelien; Garcon, Veronique; Dewitte, Boris; Illig, Serena; Leblond, Nathalie; Coppola, Laurent; Campos, Fernando; Velazco, Federico; Panagiotopoulos, Christos; Oschlies, Andreas; Martin Hernandez-ayon, J.; Maske, Helmut; Vergara, Oscar; Montes, Ivonne; Martinez, Philippe; Carrasco, Edgardo; Grelet, Jacques; Desprez-de-gesincourt, Olivier; Maes, Christophe; Scouarnec, Lionel.
The fate of the organic matter (OM) produced by marine life controls the major biogeochemical cycles of the Earth's system. The OM produced through photosynthesis is either preserved, exported towards sediments or degraded through remineralisation in the water column. The productive eastern boundary upwelling systems (EBUSs) associated with oxygen minimum zones (OMZs) would be expected to foster OM preservation due to low O-2 conditions. But their intense and diverse microbial activity should enhance OM degradation. To investigate this contradiction, sediment traps were deployed near the oxycline and in the OMZ core on an instrumented moored line off Peru. Data provided high-temporal-resolution O-2 series characterising two seasonal steady states at the...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00486/59764/62889.pdf
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On the Dynamics of the Southern Senegal Upwelling Center: Observed Variability from Synoptic to Superinertial Scales ArchiMer
Capet, Xavier; Estrade, Philippe; Machu, Eric; Ndoye, Siny; Grelet, Jacques; Lazar, Alban; Marie, Louis; Dausse, Denis; Brehmer, Patrice.
Upwelling off southern Senegal and Gambia takes place over a wide shelf with a large area where depths are shallower than 20 m. This results in typical upwelling patterns that are distinct (e.g., more persistent in time and aligned alongshore) from those of other better known systems, including Oregon and Peru where inner shelves are comparatively narrow. Synoptic to superinertial variability of this upwelling center is captured through a 4-week intensive field campaign, representing the most comprehensive measurements of this region to date. The influence of mesoscale activity extends across the shelf break and far over the shelf where it impacts the midshelf upwelling (e.g., strength of the upwelling front and circulation), possibly in concert with wind...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00374/48541/48842.pdf
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Rapport des campagnes MARACAS 7 & 8 ArchiMer
Garrigue, Claire; Bonneville, Claire; Derville, Solène; Allain, Valérie; Aucan, Jérôme; Bourgogne, Hugo; Bachelier, Celine; Dutheil, Cyril; Grelet, Jacques; Laran, Sophie; Menkes, Christophe; Niksic, Sara; Pallin, Logan; Pérard, Véronique; Portal, Annie; Receveur, Aurore; Renaud, Armelle; Roger, Jean; Varillon, David; Vourey, Elodie.
En 2014 le gouvernement de la Nouvelle-Caledonie a cree le parc naturel de la mer de Corail, l'une des plus grandes zones protegees au monde. Afin de renseigner les zones de conservation prioritaires et de faciliter la mise en place de mesures qui puissent efficacement proteger la megafaune marine, il est necessaire d'acquerir des informations sur sa distribution et l'usage des habitats. C'est pourquoi en 2016, l'IRD a lance le programme WHERE1 qui vise a explorer la distribution spatiale et l'habitat des baleines a bosse pour ameliorer leur gestion spatiale dans le parc naturel de la mer de Corail. Les principaux objectifs du programme WHERE consistent a etablir la distribution des baleines a bosse au sein du parc naturel de la mer de Corail, a evaluer la...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00611/72338/71167.pdf
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Sea Surface Salinity from French RESearcH Vessels : Delayed mode dataset, annual release ArchiMer
Gaillard, Fabienne; Diverres, Denis; Jacquin, Stéphane; Gouriou, Yves; Grelet, Jacques; Le Menn, Marc; Tassel, Joelle; Reverdin, Gilles.
French Research vessels have been collecting thermo-salinometer (TSG) data since the early 2000 in contribution to the GOSUD programme. The set of homogeneous instruments is permanently monitored and regularly calibrated. Water samples are taken on a daily basis by the crew and later analysed in the laboratory. We present here the delayed mode processing of the 2001-2013 dataset and an overview of the resulting quality. The careful calibration and instrument maintenance, complemented with a rigorous adjustment on water samples lead to reach an accuracy of a few 10-² PSS in salinity or evenless. Global comparison with the ISAS13 ARGO gridded product shows an excellent agreement of the datasets. The SSS-Fresh dataset appears as highly valuable for the...
Tipo: Dataset Palavras-chave: Sea surface salinity; Climate variability; Fresh water cycle; Atmosphere-ocean interaction.
Ano: 2015 URL: http://dx.doi.org/10.17882/39475
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Sea surface temperature and salinity from French research vessels, 2001–2013 ArchiMer
Gaillard, Fabienne; Diverres, Denis; Jacquin, Stephane; Gouriou, Yves; Grelet, Jacques; Le Menn, Marc; Tassel, Joelle; Reverdin, Gilles.
French Research vessels have been collecting thermo-salinometer (TSG) data since 1999 to contribute to the Global Ocean Surface Underway Data (GOSUD) programme. The instruments are regularly calibrated and continuously monitored. Water samples are taken on a daily basis by the crew and later analysed in the laboratory. We present here the delayed mode processing of the 2001–2013 dataset and an overview of the resulting quality. Salinity measurement error was a few hundredths of a unit or less on the practical salinity scale (PSS), due to careful calibration and instrument maintenance, complemented with a rigorous adjustment on water samples. In a global comparison, these data show excellent agreement with an ARGO-based salinity gridded product. The Sea...
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Ano: 2015 URL: https://archimer.ifremer.fr/doc/00283/39473/37954.pdf
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The Solomon Sea: its circulation, chemistry, geochemistry and biology explored during two oceanographic cruises ArchiMer
Ganachaud, Alexandre; Cravatte, Sophie; Sprintall, Janet; Germineaud, Cyril; Alberty, Marion; Jeandel, Catherine; Eldin, Gerard; Metzl, Nicolas; Bonnet, Sophie; Benavides, Mar; Heimburger, Lars-eric; Lefevre, Jerome; Michael, Susanna; Resing, Joseph; Queroue, Fabien; Sarthou, Geraldine; Rodier, Martine; Berthelot, Hugo; Baurand, Francois; Grelet, Jacques; Hasegawa, Takuya; Kessler, William; Kilepak, Moyep; Lacan, Francois; Privat, Emilien; Send, Uwe; Van Beek, Pieter; Souhaut, Marc; Sonke, Jeroen E..
The semi-enclosed Solomon Sea in the southwestern tropical Pacific is on the pathway of a major oceanic circuit connecting the subtropics to the equator via energetic western boundary currents. Waters transiting through this area replenish the Pacific Warm Pool and ultimately feed the equatorial current system, in particular the equatorial undercurrent. In addition to dynamical transformations, water masses undergo nutrient and micronutrient enrichment when coming in contact with the coasts, impacting the productivity of the downstream equatorial region. Broadscale observing systems are not well suited for describing the fine-scale currents and water masses properties in the Solomon Sea, leaving it relatively unexplored. Two multidisciplinary oceanographic...
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Ano: 2017 URL: https://archimer.ifremer.fr/doc/00390/50185/50808.pdf
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Thermosalinomètres des navires de recherche : procédures de validation temps différé ArchiMer
Krieger, Magali; Diverres, Denis; Gaillard, Fabienne; Gouriou, Yves; Grelet, Jacques.
La collecte systématique des mesures de température et de salinité de surface par les navires de recherche a été initiée en 1999, lors de la phase pilote du projet Coriolis. Aujourd'hui tous les navires hauturiers sont dotés de systèmes homogènes, qualifiés et suivis, ils transmettent leurs données en temps réel au centre de données Coriolis et des échantillons d'eau de mer sont régulièrement prélevés à bord puis acheminés vers le laboratoire d'analyse. Malgré le soin accordé à l'étalonnage des systèmes de mesure et leur nettoyage régulier, il est fréquent d'observer une dérive dans la mesure de conductivité. Il est donc important, en particulier pour le suivi à long terme et les études climatiques, de contrôler et corriger ces mesures. Ce document décrit...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00115/22584/20272.pdf
Registros recuperados: 11
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