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Eddy dynamics from satellite altimetry ArchiMer
Fu, Lee-lueng; Chelton, Dudley B.; Le Traon, Pierre-yves; Morrow, Rosemary.
Most of the kinetic energy of ocean circulation is contained in ubiquitous mesoscale eddies. Their prominent signatures in sea surface height have rendered satellite altimetry highly effective in observing global ocean eddies. Our knowledge of ocean eddy dynamics has grown by leaps and bounds since the advent of satellite altimetry in the early 1980s. A satellite's fast sampling allows a broad view of the global distribution of eddy variability and its spatial structures. Since the early 1990s, the combination of data available from two simultaneous flying altimeters has resulted in a time-series record of global maps of ocean eddies. Despite the moderate resolution, these maps provide an opportunity to study the temporal and spatial variability of the...
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Ano: 2010 URL: http://archimer.ifremer.fr/doc/00026/13744/10874.pdf
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Global Observations of Fine-Scale Ocean Surface Topography With the Surface Water and Ocean Topography (SWOT) Mission ArchiMer
Morrow, Rosemary; Fu, Lee-lueng; Ardhuin, Fabrice; Benkiran, Mounir; Chapron, Bertrand; Cosme, Emmanuel; D’ovidio, Francesco; Farrar, J. Thomas; Gille, Sarah T.; Lapeyre, Guillaume; Le Traon, Pierre-yves; Pascual, Ananda; Ponte, Aurelien; Qiu, Bo; Rascle, Nicolas; Ubelmann, Clement; Wang, Jinbo; Zaron, Edward D..
The future international Surface Water and Ocean Topography (SWOT) Mission, planned for launch in 2021, will make high-resolution 2D observations of sea-surface height using SAR radar interferometric techniques. SWOT will map the global and coastal oceans up to 77.6∘ latitude every 21 days over a swath of 120 km (20 km nadir gap). Today’s 2D mapped altimeter data can resolve ocean scales of 150 km wavelength whereas the SWOT measurement will extend our 2D observations down to 15–30 km, depending on sea state. SWOT will offer new opportunities to observe the oceanic dynamic processes at scales that are important in the generation and dissipation of kinetic energy in the ocean, and that facilitate the exchange of energy between the ocean interior and the...
Tipo: Text Palavras-chave: Ocean mesoscale circulation; Satellite altimetry; SAR-interferometry; Tides and internal tides; Calibration-validation.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00495/60685/64181.pdf
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Ocean Currents and Eddies (Chapter 3) ArchiMer
Le Traon, Pierre-yves; Morrow, Rosemary.
This chapter reviews the contribution of satellite altimetry to the observation and understanding of ocean currents and eddies. It focuses on mesoscale variability which is the dominant signal of the ocean circulation and is a crucial component of its dynamics. After a general introduction on mesoscale variability in section 1, section 2 discusses specific issues for altimeter data processing which are necessary for mesoscale studies including merging, sampling and velocity estimation. Section 3 deals with the description of ocean currents. We review first some of the main techniques used to estimate the absolute velocities and transports from altimeter data. We then look at each major current system separately, and review the considerable progress made by...
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Ano: 1999 URL: http://archimer.ifremer.fr/doc/00090/20102/17742.pdf
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Recent advances in observing mesoscale ocean dynamics with satellite altimetry ArchiMer
Morrow, Rosemary; Le Traon, Pierre-yves.
The paper provides a review of recent results on mesoscale ocean dynamics derived from satellite altimetry. Since 1992, we have had an unprecedented 18 year high-resolution monitoring of the ocean mesoscale field. Altimetry is often used in mesoscale studies in synergy with other remote sensing techniques and in situ data. This global, high-resolution data set has allowed oceanographers to quantify the previously unknown seasonal and interannual variations in eddy kinetic energy and eddy heat and salt transports, and investigate their causes. Eddy tracking techniques have allowed us to monitor their propagation pathways, to bring to light the meridional divergence of cyclones and anticyclones, and to question the role of Rossby waves versus non-linear...
Tipo: Text Palavras-chave: Satellite altimetry; Mesoscale eddies; Ocean circulation.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00087/19847/17767.pdf
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Satellite Altimetry and Key Observations: What We've Learned, and What's Possible with New Technologies ArchiMer
Scott, Robert B.; Bourassa, Mark; Chelton, Dudley; Cipollini, Paolo; Ferrari, Raffaele; Fu, Lee-lueng; Galperin, Boris; Gille, Sarah; Huang, Huei-ping; Klein, Patrice; Maximenko, Nikolai; Morrow, Rosemary; Qiu, Bo; Rodriguez, Ernesto; Stammer, Detlef; Tailleux, Remi; Wunsch, Carl.
The advent of high accuracy satellite altimetry in the 1990's brought the first global view of ocean dynamics, which together with a global network of supporting observations brought a revolution in understanding of how the ocean works [1]. At present a constellation of flying satellite missions routinely provides sea level anomaly, sea winds, sea surface temperature (SST), ocean colour, etc. with mesoscale resolution (50km to 100km, 20 to 150 days) on a near global scale. Concurrently, in situ monitoring is carried out by surface drifters, Argo floats, moorings, sea gliders as well as ship-borne CTD (Conductivity-Temperature-Depth) and XBT (Expendable Bathythermograph) (to measure profiles of temperature and salinity), and ADCP (Acoustic Doppler Current...
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00067/17791/15315.pdf
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Satellite Doppler observations for the motions of the oceans ArchiMer
Ardhuin, Fabrice; Chapron, Bertrand; Maes, Christophe; Romeiser, Roland; Gommenginger, Christine; Cravatte, Sophie; Morrow, Rosemary; Donlon, Craig; Bourassa, Mark.
Tipo: Text
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00494/60529/63992.pdf
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SEASTAR: A Mission to Study Ocean Submesoscale Dynamics and Small-Scale Atmosphere-Ocean Processes in Coastal, Shelf and Polar Seas ArchiMer
Gommenginger, Christine; Chapron, Bertrand; Hogg, Andy; Buckingham, Christian; Fox-kemper, Baylor; Eriksson, Leif; Soulat, Francois; Ubelmann, Clément; Ocampo-torres, Francisco; Nardelli, Bruno Buongiorno; Griffin, David; Lopez-dekker, Paco; Knudsen, Per; Andersen, Ole; Stenseng, Lars; Stapleton, Neil; Perrie, William; Violante-carvalho, Nelson; Schulz-stellenfleth, Johannes; Woolf, David; Isern-fontanet, Jordi; Ardhuin, Fabrice; Klein, Patrice; Mouche, Alexis; Pascual, Ananda; Capet, Xavier; Hauser, Daniele; Stoffelen, Ad; Morrow, Rosemary; Aouf, Lotfi; Breivik, Øyvind; Fu, Lee-lueng; Johannessen, Johnny A.; Aksenov, Yevgeny; Bricheno, Lucy; Hirschi, Joel; Martin, Adrien Ch; Martin, Adiran P; Nurser, George; Polton, Jeff; Wolf, Judith; Johnsen, Harald; Soloviev, Alexander; Jacobs, Gregg A.; Collard, Fabrice; Groom, Steve; Kudryavtsev, Vladimir; Wilkin, John; Navarro, Victor; Babanin, Alex; Martin, Matthew; Siddorn, John; Saulter, Andrew; Rippeth, Tom; Emery, Bill; Maximenko, Nikolai; Romeiser, Roland; Graber, Hans; Azcarate, Aida Alvera; Hughes, Chris W.; Vandemark, Doug; Silva, Jose Da; Leeuwen, Peter Jan Van; Naveira-garabato, Alberto; Gemmrich, Johannes; Mahadevan, Amala; Marquez, Jose; Munro, Yvonne; Doody, Sam; Burbidge, Geoff.
High-resolution satellite images of ocean color and sea surface temperature reveal an abundance of ocean fronts, vortices and filaments at scales below 10 km but measurements of ocean surface dynamics at these scales are rare. There is increasing recognition of the role played by small scale ocean processes in ocean-atmosphere coupling, upper-ocean mixing and ocean vertical transports, with advanced numerical models and in situ observations highlighting fundamental changes in dynamics when scales reach 1 km. Numerous scientific publications highlight the global impact of small oceanic scales on marine ecosystems, operational forecasts and long-term climate projections through strong ageostrophic circulations, large vertical ocean velocities and mixed layer...
Tipo: Text Palavras-chave: Satellite; Air sea interactions; Upper ocean dynamics; Submesoscale; Coastal; Marginal ice zone; Radar; Along-track interferometry.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00510/62121/66325.pdf
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The Benefits of the Ka-Band as Evidenced from the SARAL/AltiKa Altimetric Mission: Scientific Applications ArchiMer
Verron, Jacques; Bonnefond, Pascal; Aouf, Lofti; Birol, Florence; Bhowmick, Suchandra A.; Calmant, Stephane; Conchy, Taina; Cretaux, Jean-francois; Dibarboure, Gerald; Dubey, A. K.; Faugere, Yannice; Guerreiro, Kevin; Gupta, P. K.; Hamon, Mathieu; Jebri, Fatma; Kumar, Raj; Morrow, Rosemary; Pascual, Ananda; Pujol, Marie-isabelle; Remy, Elisabeth; Remy, Frederique; Smith, Walter H. F.; Tournadre, Jean; Vergara, Oscar.
The India-France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated primarily to oceanography. The mission objectives were firstly the observation of the oceanic mesoscales but also global and regional sea level monitoring, including the coastal zone, data assimilation, and operational oceanography. SARAL/AltiKa proved also to be a great opportunity for inland waters applications, for observing ice sheet or icebergs, as well as for geodetic investigations. The mission ended its nominal phase after three years in orbit and began a new phase (drifting orbit) in July 2016. The objective of this paper is to highlight some of the most remarkable achievements of the SARAL/AltiKa mission in terms of scientific applications. Compared to the...
Tipo: Text Palavras-chave: Altimetry; Ka-band; Oceanography; Hydrology; Ice; Geodesy.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00600/71248/69623.pdf
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The Copernicus Marine Environment Monitoring Service Ocean State Report ArchiMer
Von Schuckmann, Karina; Le Traon, Pierre-yves; Alvarez-fanjul, Enrique; Axell, Lars; Balmaseda, Magdalena; Breivik, Lars-anders; Brewin, Robert J. W.; Bricaud, Clement; Drevillon, Marie; Drillet, Yann; Dubois, Clotilde; Embury, Owen; Etienne, Helene; Garcia Sotillo, Marcos; Garric, Gilles; Gasparin, Florent; Gutknecht, Elodie; Guinehut, Stephanie; Hernandez, Fabrice; Juza, Melanie; Karlson, Bengt; Korres, Gerasimos; Legeais, Jean Francois; Levier, Bruno; Lien, Vidar S.; Morrow, Rosemary; Notarstefano, Giulio; Parent, Laurent; Pascual, Alvaro; Perez-gomez, Begona; Perruche, Coralie; Pinardi, Nadia; Pisano, Andrea; Poulain, Pierre-marie; Pujol, Isabelle M.; Raj, Roshin P.; Raudsepp, Urmas; Roquet, Herve; Samuelsen, Annette; Sathyendranath, Shubha; She, Jun; Simoncelli, Simona; Solidoro, Cosimo; Tinker, Jonathan; Tintore, Joaquin; Viktorsson, Lena; Ablain, Michael; Almroth-rosell, Elin; Bonaduce, Antonio; Clementi, Emanuela; Cossarini, Gianpiero; Dagneaux, Quentin; Desportes, Charles; Dye, Stephen; Fratianni, Claudia; Good, Simon; Greiner, Eric; Gourrion, Jerome; Hamon, Mathieu; Holt, Jason; Hyder, Pat; Kennedy, John; Manzano-munoz, Fernando; Melet, Angelique; Meyssignac, Benoit; Mulet, Sandrine; Nardelli, Bruno Buongiorno; O'Dea, Enda; Olason, Einar; Paulmier, Aurelien; Perez-gonzalez, Irene; Reid, Rebecca; Racault, Marie-fanny; Raitsos, Dionysios E.; Ramos, Antonio; Sykes, Peter; Szekely, Tanguy; Verbrugge, Nathalie.
The Copernicus Marine Environment Monitoring Service (CMEMS) Ocean State Report (OSR) provides an annual report of the state of the global ocean and European regional seas for policy and decision-makers with the additional aim of increasing general public awareness about the status of, and changes in, the marine environment. The CMEMS OSR draws on expert analysis and provides a 3-D view (through reanalysis systems), a view from above (through remote-sensing data) and a direct view of the interior (through in situ measurements) of the global ocean and the European regional seas. The report is based on the unique CMEMS monitoring capabilities of the blue (hydrography, currents), white (sea ice) and green (e.g. Chlorophyll) marine environment. This first...
Tipo: Text Palavras-chave: Copernicus Marine Environment Monitoring Service; Ocean reporting; Ocean monitoring; State of the ocean; Ocean variability; Operational oceanography; Ocean climate variability.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00383/49471/49959.pdf
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