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| Claudet, Joachim; Bopp, Laurent; Cheung, William W.l.; Devillers, Rodolphe; Escobar-briones, Elva; Haugan, Peter; Heymans, Johanna J.; Masson-delmotte, Valérie; Matz-lück, Nele; Miloslavich, Patricia; Mullineaux, Lauren; Visbeck, Martin; Watson, Robert; Zivian, Anna Milena; Ansorge, Isabelle; Araujo, Moacyr; Aricò, Salvatore; Bailly, Denis; Barbière, Julian; Barnerias, Cyrille; Bowler, Chris; Brun, Victor; Cazenave, Anny; Diver, Cameron; Euzen, Agathe; Gaye, Amadou Thierno; Hilmi, Nathalie; Ménard, Frédéric; Moulin, Cyril; Muñoz, Norma Patricia; Parmentier, Rémi; Pebayle, Antoine; Pörtner, Hans-otto; Osvaldina, Silva; Ricard, Patricia; Santos, Ricardo Serrão; Sicre, Marie-alexandrine; Thiébault, Stéphanie; Thiele, Torsten; Troublé, Romain; Turra, Alexander; Uku, Jacqueline; Gaill, Françoise. |
| The health of the ocean, central to human well-being, has now reached a critical point. Most fish stocks are overexploited, climate change and increased dissolved carbon dioxide are changing ocean chemistry and disrupting species throughout food webs, and the fundamental capacity of the ocean to regulate the climate has been altered. However, key technical, organizational, and conceptual scientific barriers have prevented the identification of policy levers for sustainability and transformative action. Here, we recommend key strategies to address these challenges, including (1) stronger integration of sciences and (2) ocean-observing systems, (3) improved science-policy interfaces, (4) new partnerships supported by (5) a new ocean-climate finance system,... |
| Tipo: Text |
Palavras-chave: Ocean health; Human well-being; United Nations; Policy levers; Sustainability; Transformative actions; Strategy. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00637/74861/75262.pdf |
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| Riser, Stephen C.; Freeland, Howard J.; Roemmich, Dean; Wijffels, Susan; Troisi, Ariel; Belbeoch, Mathieu; Gilbert, Denis; Xu, Jianping; Pouliquen, Sylvie; Ann Thresher,; Le Traon, Pierre-yves; Maze, Guillaume; Klein, Birgit; Ravichandran, M.; Grant, Fiona; Poulain, Pierre-marie; Suga, Toshio; Lim, Byunghwan; Sterl, Andreas; Sutton, Philip; Mork, Kjell-arne; Joaquin Velez-belch, Pedro; Ansorge, Isabelle; King, Brian; Turton, Jon; Baringer, Molly; Jayne, Steven R.. |
| More than 90% of the heat energy accumulation in the climate system between 1971 and the present has been in the ocean. Thus, the ocean plays a crucial role in determining the climate of the planet. Observing the oceans is problematic even under the most favourable of conditions. Historically, shipboard ocean sampling has left vast expanses, particularly in the Southern Ocean, unobserved for long periods of time. Within the past 15 years, with the advent of the global Argo array of pro ling oats, it has become possible to sample the upper 2,000 m of the ocean globally and uniformly in space and time. The primary goal of Argo is to create a systematic global network of pro ling oats that can be integrated with other elements of the Global Ocean Observing... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00310/42106/46565.pdf |
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| Meinen, Christopher S.; Speich, Sabrina; Piola, Alberto R.; Ansorge, Isabelle; Campos, Edmo; Kersale, Marion; Terre Terrillon, Thierry; Chidichimo, Maria Paz; Lamont, Tarron; Sato, Olga T.; Perez, Renellys C.; Valla, Daniel; Van Den Berg, Marcel; Le Henaff, Matthieu; Dong, Shenfu; Garzoli, Silvia L.. |
| Six years of simultaneous moored observations near the western and eastern boundaries of the South Atlantic are combined with satellite winds to produce a daily time series of the basin-wide meridional overturning circulation (MOC) volume transport at 34.5 degrees S. The results demonstrate that barotropic and baroclinic signals at both boundaries cause significant transport variations, and as such must be concurrently observed. The data, spanning similar to 20 months during 2009-2010 and similar to 4 years during 2013-2017, reveal a highly energetic MOC record with a temporal standard deviation of 8.3 Sv, and strong variations at time scales ranging from a few days to years (peak-to-peak range = 54.6 Sv). Seasonal transport variations are found to have... |
| Tipo: Text |
Palavras-chave: Meridional overturning circulation; South Atlantic; Overturning; Volume transport; Observations. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00445/55612/57253.pdf |
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| Halo, Issufo; Penven, Pierrick; Backeberg, Bjoern; Ansorge, Isabelle; Shillington, Frank; Roman, Raymond. |
| In this study, we used more than 17 years of satellite altimetry observations and output from an ocean model to investigate the mesoscale eddy variability and forcing mechanisms to the south of Madagascar. Analysis of energy conversion terms in the model has shown seasonality on eddy formation, both by barotropic and baroclinic instabilities: maximum in winter (JJA) and minimum in summer (DJF). The eddies were mainly formed in the upper ocean (0–300 m) and at intermediate depths (800–2000 m) by barotropic and baroclinic instabilities, respectively. The former dominated in the southeastern margin of Madagascar, and the latter to the southwest, where the South-East Madagascar Current (SEMC) separates from the continental shelf. Seasonality of the eddy... |
| Tipo: Text |
Palavras-chave: Mesoscale eddies; Barotropic; Baroclinic instabilities; Seasonality; Eddy properties; Variability. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00222/33348/31749.pdf |
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| Sloyan, Bernadette M.; Wanninkhof, Rik; Kramp, Martin; Johnson, Gregory C.; Talley, Lynne D.; Tanhua, Toste; Mcdonagh, Elaine; Cusack, Caroline; O’rourke, Eleanor; Mcgovern, Evin; Katsumata, Katsuro; Diggs, Steve; Hummon, Julia; Ishii, Masao; Azetsu-scott, Kumiko; Boss, Emmanuel; Ansorge, Isabelle; Perez, Fiz; Mercier, Herle; Williams, Michael J. M.; Anderson, Leif; Lee, Jae Hak; Murata, Akihiko; Kouketsu, Shinya; Jeansson, Emil; Hoppema, Mario; Campos, Edmo. |
| The Global Ocean Ship-Based Hydrographic Investigations Program (GO-SHIP) provides a globally coordinated network and oversight of 55 sustained decadal repeat hydrographic reference lines. GO-SHIP is part of the global ocean/climate observing systems (GOOS/GCOS) for study of physical oceanography, the ocean carbon, oxygen and nutrient cycles, and marine biogeochemistry. GO-SHIP enables assessment of the ocean sequestration of heat and carbon, changing ocean circulation and ventilation patterns, and their effects on ocean health and Earth’s climate. Rapid quality control and open data release along with incorporation of the GO-SHIP effort in the Joint Technical Commission for Oceanography and Marine Meteorology (JCOMM) in situ Observing Programs Support... |
| Tipo: Text |
Palavras-chave: GO-SHIP; Ship-based observations; Multidisciplinary ocean research; Contemporaneous ocean observations; Global ocean change and variability; Health; Essential ocean variables; Essential climate variables. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62062/66243.pdf |
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