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| Tournadre, Jean; Ardhuin, Fanny; Legresy, Benoit. |
| Interest for icebergs and their possible impact on southern ocean circulation and biology has increased during the recent years. While large tabular icebergs are routinely tracked and monitored using scatterometer data, the distribution of smaller icebergs (less than some km) is still largely unknown as they are difficult to detect operationally using conventional satellite data. In a recent study, Tournadre et al. (2008) showed that small icebergs can be detected, at least in open water, using high resolution (20 Hz) altimeter waveforms. In the present paper, we present an improvement of their method that allows, assuming a constant iceberg freeboard elevation and constant ice backscatter coefficient, to estimate the top-down iceberg surface area and... |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00083/19444/17050.pdf |
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| Legresy, Benoit. |
| Une mesure de l'évolution actuelle du climat terrestre peut être la variation du niveau moyen des océans. Cette mesure représente l'intégrale de tous les effets d'un changement de climat et doit être fine. L'effet stérique de dilatation thermique des couches supérieures de l'océan, la fonte des glaciers des zones tempérées et la fonte/gonflement des calottes polaires Groënland et Antarctique représentent les principales composantes de cette intégrale. La dynamique d'une calotte polaire est régie principalement par les taux d'accumulation à l'intérieur du continent et les taux d'évacuation de la glace en périphérie. L'Antarctique reçoit et évacue chaque année l'équivalent de 5 mm de niveau des océans. Une variation de 10% de l'équilibre de ces 2 termes... |
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| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00106/21691/19270.pdf |
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| Cazenave, Anny; Meyssignac, Benoit; Ablain, Michael; Balmaseda, Magdalena; Bamber, Jonathan; Barletta, Valentina; Beckley, Brian; Benveniste, Jerome; Berthier, Etienne; Blazquez, Alejandro; Boyer, Tim; Caceres, Denise; Chambers, Don; Champollion, Nicolas; Chao, Ben; Chen, Jianli; Cheng, Lijing; Church, John A.; Chuter, Stephen; Cogley, J. Graham; Dangendorf, Soenke; Desbruyeres, Damien; Doell, Petra; Domingues, Catia; Falk, Ulrike; Famiglietti, James; Fenoglio-marc, Luciana; Forsberg, Rene; Galassi, Gaia; Gardner, Alex; Groh, Andreas; Hamlington, Benjamin; Hogg, Anna; Horwath, Martin; Humphrey, Vincent; Husson, Laurent; Ishii, Masayoshi; Jaeggi, Adrian; Jevrejeva, Svetlana; Johnson, Gregory; Kolodziejczyk, Nicolas; Kusche, Juergen; Lambeck, Kurt; Landerer, Felix; Leclercq, Paul; Legresy, Benoit; Leuliette, Eric; Llovel, William; Longuevergne, Laurent; Loomis, Bryant D.; Luthcke, Scott B.; Marcos, Marta; Marzeion, Ben; Merchant, Chris; Merrifield, Mark; Milne, Glenn; Mitchum, Gary; Mohajerani, Yara; Monier, Maeva; Monselesan, Didier; Nerem, Steve; Palanisamy, Hindumathi; Paul, Frank; Perez, Begona; Piecuch, Christopher G.; Ponte, Rui M.; Purkey, Sarah G.; Reager, John T.; Rietbroek, Roelof; Rignot, Eric; Riva, Riccardo; Roemmich, Dean H.; Sorensen, Louise Sandberg; Sasgen, Ingo; Schrama, E. J. O.; Seneviratne, Sonia I.; Shum, C. K.; Spada, Giorgio; Stammer, Detlef; Van De Wal, Roderic; Velicogna, Isabella; Von Schuckmann, Karina; Wada, Yoshihide; Wang, Yiguo; Watson, Christopher; Wiese, David; Wijffels, Susan; Westaway, Richard; Woppelmann, Guy; Wouters, Bert. |
| Global mean sea level is an integral of changes occurring in the climate system in response to unforced climate variability as well as natural and anthropogenic forcing factors. Its temporal evolution allows changes (e.g.,acceleration) to be detected in one or more components. Study of the sea-level budget provides constraints on missing or poorly known contributions, such as the unsurveyed deep ocean or the still uncertain land water component. In the context of the World Climate Research Programme Grand Challenge entitled "Regional Sea Level and Coastal Impacts", an international effort involving the sea-level community worldwide has been recently initiated with the objective of assessing the various datasets used to estimate components of the sea-level... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56564/58270.pdf |
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