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| Registros recuperados: 36 | |
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| Bittig, Henry; Kortzinger, Arne; Johnson, Ken; Claustre, Hervé; Emerson, Steve; Fennel, Katja; Garcia, Hernan; Gilbert, Denis; Gruber, Nicolas; Kang, Dong-jin; Naqvi, Wajih; Prakash, Satya; Riser, Steven; Thierry, Virginie; Tilbrook, Bronte; Uchida, Hiroshi; Ulloa, Osvaldo; Xing, Xiagang. |
| Recommendation for Oxygen Measurements from Argo Floats: Implementation of In-Air-Measurement Routine to Assure Highest Long-term Accuracy As Argo has entered its second decade and chemical/biological sensor technology is improving constantly, the marine biogeochemistry community is starting to embrace the successful Argo float program. An augmentation of the global float observatory, however, has to follow rather stringent constraints regarding sensor characteristics as well as data processing and quality control routines. Owing to the fairly advanced state of oxygen sensor technology and the high scientific value of oceanic oxygen measurements (Gruber et al., 2010), an expansion of the Argo core mission to routine oxygen measurements is perhaps the most... |
| Tipo: Text |
Palavras-chave: Argo; Bio-argo; Oxygen. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00348/45917/46180.pdf |
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| Le Traon, Pierre-yves; D'Ortenzio, Fabrizio; Babin, Marcel; Leymarie, Edouard; Marec, Claudie; Pouliquen, Sylvie; Thierry, Virginie; Cabanes, Cecile; Claustre, Hervé; Desbruyeres, Damien; Lacour, Leo; Lagunas, Jose-luis; Maze, Guillaume; Mercier, Herle; Penkerc'H, Christophe; Poffa, Noe; Poteau, Antoine; Prieur, Louis; Racape, Virginie; Randelhoff, Achim; Rehm, Eric; Schmechtig, Catherine Marie; Taillandier, Vincent; Wagener, Thibaut; Xing, Xiaogang. |
| Argo, the international array of profiling floats, is a major component of the global ocean and climate observing system. In 2010, the NAOS (Novel Argo Observing System) project was selected as part of the French “Investissements d’Avenir” Equipex program. The objectives of NAOS were to consolidate the French contribution to Argo’s core mission (global temperature and salinity measurements down to 2000 m), and also to develop the future generation of French Argo profiling floats and prepare the next phase of the Argo program with an extension to the deep ocean (Deep Argo), biogeochemistry (BGC-Argo) and polar seas. This paper summarizes how NAOS has met its objectives. The project significantly boosted France’s contribution to Argo’s core mission by... |
| Tipo: Text |
Palavras-chave: Profiling floats; Deep ocean; Biogeochemistry; Mediterranean Sea; Arctic; Atlantic; Argo. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00654/76584/77729.pdf |
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| Lagunas, Jose; Marec, Claudie; Leymarie, Edouard; Penkerc'H, Christophe; Rehm, Eric; Desaulniers, Pierre; Brousseau, Denis; Larochelle, Patrick; Roy, Gilles; Fournier, Georges; Thibault, Simon; Babin, Marcel. |
| The use of Lagrangian platforms and of Autonomous Underwater Vehicles (AUVs) in oceanography has increased rapidly over the last decade along with the development of improved biological and chemical sensors. These vehicles provide new spatial and temporal scales for observational studies of the ocean. They offer a broad range of deployment and recovery capabilities that reduce the need of large research vessels. This is especially true for ice-covered Arctic ocean where surface navigation is only possible during the summer period. Moreover, safe underwater navigation in icy waters requires the capability of detecting sea ice on the surface (ice sheets). AUVs navigating in such conditions risk collisions, RF communication shadowing, and being trapped by ice... |
| Tipo: Text |
Palavras-chave: Lidar; Polarization; Sea-ice; AUV; Argo; Arctic; Amundsen; Marine robotics. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00475/58665/61166.pdf |
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| Thierry, Virginie; Bittig, Henry; Gilbert, Denis; Kobayashi, Taiyo; Kanako, Sato; Schmid, Claudia. |
| This document does NOT address the issue of oxygen data quality control (either real-time or delayed mode). As a preliminary step towards that goal, this document seeks to ensure that all countries deploying floats equipped with oxygen sensors document the data and metadata related to these floats properly. We produced this document in response to action item 14 from the AST-10 meeting in Hangzhou (March 22-23, 2009). Action item 14: Denis Gilbert to work with Taiyo Kobayashi and Virginie Thierry to ensure DACs are processing oxygen data according to recommendations. If the recommendations contained herein are followed, we will end up with a more uniform set of oxygen data within the Argo data system, allowing users to begin analysing not only their own... |
| Tipo: Text |
Palavras-chave: Argo; Bio-argo; Oxygen. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00287/39795/59750.pdf |
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| Feucher, Charlene; Maze, Guillaume; Mercier, Herle. |
| In the north Atlantic subtropical gyre, the oceanic vertical structure of density is characterized by a region of rapid increase with depth. This layer is called the permanent pycnocline because this density feature is observed throughout the year. The pycnocline is the transition layer between light, low-latitude, surface water masses which are ventilated every winter when penetrated locally by the mixed layer and dense, deeper water masses whose properties are set in the high latitudes and circulate equatorward. In-situ data from the Argo array provide temperature/salinity profiles allowing the characterization in space and time of the permanent pycnocline. We thus developed a new method to characterize its depth, thickness and thermohaline... |
| Tipo: Text |
Palavras-chave: Argo; Quality Control; Pattern; Clustering; North Atlantic; Subtropical gyre; Stratification. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00242/35315/33838.pdf |
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| Schmechtig, Catherine; Poteau, Antoine; Claustre, Herve; D’ortenzio, Fabrizio. |
| Presently, radiometers can be implemented on profiling floats to estimate some radiometric measurements. Hereafter we briefly describe the principle of this method and several configurations of the OCR500 series instruments. These measurements can be radiance or irradiance at different wavelengths and in different directions (upward or downward). The Photosynthetically Available Radiation (PAR) is also measured as it represents the solar radiation that photosynthetic organisms are able to use in the process of photosynthesis. At the moment all radiometric sensors implemented on floats are developed by the Satlantic Company and are of the OCR serie. These radiometers combine three wavelengths for irradiance measurements together with a measurement of the... |
| Tipo: Text |
Palavras-chave: Argo; Bgc-argo; Optic. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00404/51541/52133.pdf |
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| Le Guen, Robin. |
| This document is the synthesis of a study to apply Machine Learning to Argo floats temperature and salinity Delayed Mode Quality Control (Core-Argo-DMQC). There already exist numerous DMQC tests. Most of the times they are specific to a particular type of problem with an Argo profile or an Argo measure. For example, there are tests to detect drifts, other tests to detect spikes, others for thermal lags and so on … To get a clean database, all the alerts generated by those tests sum up and analysts need to study the corresponding profiles. The aim of our study is to try to use Machine Learning to detect any kind of problem with Argo profiles and reduce the amount of time and work for the analysts. The model can be upgraded in many ways but it already gets... |
| Tipo: Text |
Palavras-chave: Argo; Argo. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00632/74394/74090.pdf |
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| Roemmich, Dean; Alford, Matthew H.; Claustre, Hervé; Johnson, Kenneth; King, Brian; Moum, James; Oke, Peter; Owens, W. Brechner; Pouliquen, Sylvie; Purkey, Sarah; Scanderbeg, Megan; Suga, Toshio; Wijffels, Susan; Zilberman, Nathalie; Bakker, Dorothee; Baringer, Molly; Belbeoch, Mathieu; Bittig, Henry C.; Boss, Emmanuel; Calil, Paulo; Carse, Fiona; Carval, Thierry; Chai, Fei; Conchubhair, Diarmuid Ó.; D’ortenzio, Fabrizio; Dall’olmo, Giorgio; Desbruyeres, Damien; Fennel, Katja; Fer, Ilker; Ferrari, Raffaele; Forget, Gael; Freeland, Howard; Fujiki, Tetsuichi; Gehlen, Marion; Greenan, Blair; Hallberg, Robert; Hibiya, Toshiyuki; Hosoda, Shigeki; Jayne, Steven; Jochum, Markus; Johnson, Gregory C.; Kang, Kiryong; Kolodziejczyk, Nicolas; Körtzinger, Arne; Traon, Pierre-yves Le; Lenn, Yueng-djern; Maze, Guillaume; Mork, Kjell Arne; Morris, Tamaryn; Nagai, Takeyoshi; Nash, Jonathan; Garabato, Alberto Naveira; Olsen, Are; Pattabhi, Rama Rao; Prakash, Satya; Riser, Stephen; Schmechtig, Catherine; Schmid, Claudia; Shroyer, Emily; Sterl, Andreas; Sutton, Philip; Talley, Lynne; Tanhua, Toste; Thierry, Virginie; Thomalla, Sandy; Toole, John; Troisi, Ariel; Trull, Thomas W.; Turton, Jon; Velez-belchi, Pedro Joaquin; Walczowski, Waldemar; Wang, Haili; Wanninkhof, Rik; Waterhouse, Amy F.; Waterman, Stephanie; Watson, Andrew; Wilson, Cara; Wong, Annie P. S.; Xu, Jianping; Yasuda, Ichiro. |
| The Argo Program has been implemented and sustained for almost two decades, as a global array of about 4000 profiling floats. Argo provides continuous observations of ocean temperature and salinity versus pressure, from the sea surface to 2000 dbar. The successful installation of the Argo array and its innovative data management system arose opportunistically from the combination of great scientific need and technological innovation. Through the data system, Argo provides fundamental physical observations with broad societally-valuable applications, built on the cost-efficient and robust technologies of autonomous profiling floats. Following recent advances in platform and sensor technologies, even greater opportunity exists now than 20 years ago to (i)... |
| Tipo: Text |
Palavras-chave: Argo; Floats; Global; Ocean; Warming; Circulation; Temperature; Salinity. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62043/66192.pdf |
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| Forget, Gael; Mercier, Herle; Ferron, Bruno. |
| A set of Argo profiles collected in the North Atlantic between May 2002 and April 2003 is combined with a low-resolution general circulation model (GCM) using the adjoint method. Fitting the real hydrographic observations leads to vast improvements in the model circulation., including the sea surface height and the meridional heat transport. We find striking differences in basin-scale transports compared with previous assimilation experiments that use the same GCM and a similar spatial resolution. Based on forward modeling studies, it is argued that these differences are due to different assimilation experiment durations. Over 1 year, the hydrography interpolated with the GCM from Argo profiles better represents the contemporary structures than does a... |
| Tipo: Text |
Palavras-chave: General circulation model; Argo; In situ observations; 4DVAR; Data assimilation. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-3920.pdf |
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| Wong, Annie P. S.; Wijffels, Susan E.; Riser, Stephen C.; Pouliquen, Sylvie; Hosoda, Shigeki; Roemmich, Dean; Gilson, John; Johnson, Gregory C.; Martini, Kim; Murphy, David J.; Scanderbeg, Megan; Bhaskar, T. V. S. Udaya; Buck, Justin J. H.; Merceur, Frederic; Carval, Thierry; Maze, Guillaume; Cabanes, Cécile; André, Xavier; Poffa, Noe; Yashayaev, Igor; Barker, Paul M.; Guinehut, Stéphanie; Belbéoch, Mathieu; Ignaszewski, Mark; Baringer, Molly O'Neil; Schmid, Claudia; Lyman, John M.; Mctaggart, Kristene E.; Purkey, Sarah G.; Zilberman, Nathalie; Alkire, Matthew B.; Swift, Dana; Owens, W. Brechner; Jayne, Steven R.; Hersh, Cora; Robbins, Pelle; West-mack, Deb; Bahr, Frank; Yoshida, Sachiko; Sutton, Philip J. H.; Cancouët, Romain; Coatanoan, Christine; Dobbler, Delphine; Juan, Andrea Garcia; Gourrion, Jerome; Kolodziejczyk, Nicolas; Bernard, Vincent; Bourlès, Bernard; Claustre, Hervé; D'Ortenzio, Fabrizio; Le Reste, Serge; Le Traon, Pierre-yves; Rannou, Jean Philippe; Saout-grit, Carole; Speich, Sabrina; Thierry, Virginie; Verbrugge, Nathalie; Angel-benavides, Ingrid M.; Klein, Birgit; Notarstefano, Giulio; Poulain, Pierre-marie; Vélez-belchí, Pedro; Suga, Toshio; Ando, Kentaro; Iwasaska, Naoto; Kobayashi, Taiyo; Masuda, Shuhei; Oka, Eitarou; Sato, Kanako; Nakamura, Tomoaki; Sato, Katsunari; Takatsuki, Yasushi; Yoshida, Takashi; Cowley, Rebecca; Lovell, Jenny L.; Oke, Peter R.; Van Wijk, Esmee M.; Carse, Fiona; Donnelly, Matthew; Gould, W. John; Gowers, Katie; King, Brian A.; Loch, Stephen G.; Mowat, Mary; Turton, Jon; Rama Rao, E. Pattabhi; Ravichandran, M.; Freeland, Howard J.; Gaboury, Isabelle; Gilbert, Denis; Greenan, Blair J. W.; Ouellet, Mathieu; Ross, Tetjana; Tran, Anh; Dong, Mingmei; Liu, Zenghong; Xu, Jianping; Kang, Kiryong; Jo, Hyeongjun; Kim, Sung-dae; Park, Hyuk-min. |
| In the past two decades, the Argo Program has collected, processed, and distributed over two million vertical profiles of temperature and salinity from the upper two kilometers of the global ocean. A similar number of subsurface velocity observations near 1,000 dbar have also been collected. This paper recounts the history of the global Argo Program, from its aspiration arising out of the World Ocean Circulation Experiment, to the development and implementation of its instrumentation and telecommunication systems, and the various technical problems encountered. We describe the Argo data system and its quality control procedures, and the gradual changes in the vertical resolution and spatial coverage of Argo data from 1999 to 2019. The accuracies of the... |
| Tipo: Text |
Palavras-chave: Global; Ocean; Pressure; Temperature; Salinity; Argo; Profiling; Floats. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00652/76377/77385.pdf |
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| Feucher, Charlene; Maze, Guillaume; Mercier, Herle. |
| A global reference state of the subtropical mode waters and permanent pycnoclines properties for the 2000‐2015 period is presented. The climatology is obtained from a pattern recognition algorithm applied to stratification profiles from the Argo global array. The stratification features are identified as permanent upper ocean pycnostad and pycnocline even when the seasonal pycnocline is developed. The climatology shows that both Northern Hemisphere subtropical gyres have a qualitatively very similar stratification structure. The permanent pycnocline in the North Atlantic and North Pacific show two deep centers colocated with thick subtropical and subpolar mode waters. These centers coincide with modes in the density and stratification space. These deep... |
| Tipo: Text |
Palavras-chave: Subtropical gyre; Pycnocline; Argo; Global ocean; Stratification. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00480/59176/61817.pdf |
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| Registros recuperados: 36 | |
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