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| Bourras, Denis; Cambra, Remi; Marié, Louis; Bouin, Marie-noëlle; Baggio, Lucio; Branger, Hubert; Beghoura, Houda; Reverdin, Gilles; Dewitte, Boris; Paulmier, Aurélien; Maes, Christophe; Ardhuin, Fabrice; Pairaud, Ivane; Fraunié, Philippe; Luneau, Christopher; Hauser, Danièle. |
| Turbulent fluxes at the air‐sea interface are estimated with data collected in 2011 to 2017 with a low‐profile platform during six experiments in four regions. The observations were carried out with moderate winds (2‐10 m s‐1) and averaged wave heights of 1.5 m. Most of the time, there was a swell, with an averaged wave age (the ratio between wave phase speed and wind speed) being equal to 2.8±1.6. Three flux calculation methods are used, namely the eddy‐covariance (EC), the inertial‐dissipation (ID), and the bulk methods. For the EC method, a spectral technique is proposed to correct wind data from platform motion. A mean bias affecting the friction velocity (u*) is then evaluated. The comparison between EC u* and ID u* estimates suggests that a constant... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00503/61436/65156.pdf |
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| Hernandez-ayon, Jose M.; Paulmier, Aurélien; Garcon, Veronique; Sudre, Joel; Montes, Ivonne; Chapa-balcorta, Cecilia; Durante, Giovanni; Dewitte, Boris; Maes, Christophe; Bretagnon, Marine. |
| The oxygen minimum zone (OMZ) of Peru is recognized as a source of CO2 to the atmosphere due to upwelling that brings water with high concentrations of dissolved inorganic carbon (DIC) to the surface. However, the influence of OMZ dynamics on the carbonate system remains poorly understood given a lack of direct observations. This study examines the influence of a coastal Eastern South Pacific OMZ on carbonate system dynamics based on a multidisciplinary cruise that took place in 2014. During the cruise, onboard DIC and pH measurements were used to estimate pCO2 and to calculate the calcium carbonate saturation state (Ω aragonite and calcite). South of Chimbote (9°S), water stratification decreased and both the oxycline and carbocline moved from 150 m depth... |
| Tipo: Text |
Palavras-chave: OMZ; DIC; PH; Omega aragonite; Upwelling Peruvian system. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00588/70004/67919.pdf |
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| Montes, Ivonne; Dewitte, Boris; Gutknecht, Elodie; Paulmier, Aurelien; Dadou, Isabelle; Oschlies, Andreas; Garcon, Veronique. |
| The connection between the equatorial mean circulation and the oxygen minimum zone (OMZ) in the Eastern Tropical Pacific is investigated through sensitivity experiments with a high-resolution coupled physical-biogeochemical model. A validation against in situ observations indicates a realistic simulation of the vertical and horizontal oxygen distribution by the model. Two sets of climatological open-boundary conditions for the physical variables, which differ slightly with respect to the intensity and vertical structure of the Equatorial Current System, are shown to lead to contrasting characteristics of the simulated OMZ dynamics. From a Lagrangian perspective, the mean differences near the coast originate to a large extent from the different transport of... |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00688/79998/82951.pdf |
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| 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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| Stammer, Detlef; Bracco, Annalisa; Achutarao, Krishna; Beal, Lisa; Bindoff, Nathaniel L.; Braconnot, Pascale; Cai, Wenju; Chen, Dake; Collins, Matthew; Danabasoglu, Gokhan; Dewitte, Boris; Farneti, Riccardo; Fox-kemper, Baylor; Fyfe, John; Griffies, Stephen M.; Jayne, Steven R.; Lazar, Alban; Lengaigne, Matthieu; Lin, Xiaopei; Marsland, Simon; Minobe, Shoshiro; Monteiro, Pedro M. S.; Robinson, Walter; Roxy, Mathew Koll; Rykaczewski, Ryan R.; Speich, Sabrina; Smith, Inga J.; Solomon, Amy; Storto, Andrea; Takahashi, Ken; Toniazzo, Thomas; Vialard, Jerome. |
| Natural variability and change of the Earth's climate have significant global societal impacts. With its large heat and carbon capacity and relatively slow dynamics, the ocean plays an integral role in climate, and provides an important source of predictability at seasonal and longer timescales. In addition, the ocean provides the slowly evolving lower boundary to the atmosphere, driving, and modifying atmospheric weather. Understanding and monitoring ocean climate variability and change, to constrain and initialize models as well as identify model biases for improved climate hindcasting and prediction, requires a scale-sensitive, and long-term observing system. A climate observing system has requirements that significantly differ from, and sometimes are... |
| Tipo: Text |
Palavras-chave: Ocean observing system; Ocean climate; Earth observations; In situ measurements; Satellite observations; Ocean modeling; Climate information. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00675/78724/80996.pdf |
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| Pizarro-koch, Matias; Pizarro, Oscar; Dewitte, Boris; Montes, Ivonne; Ramos, Marcel; Paulmier, Aurelien; Garcon, Veronique. |
| We investigate the seasonal variability of the southern tip (30 degrees-38 degrees S) of the eastern South Pacific oxygen minimum zone (OMZ) based on a high horizontal resolution (1/12 degrees) regional coupled physical-biogeochemical model simulation. The simulation is validated by available in situ observations and the OMZ seasonal variability is documented. The model OMZ, bounded by the contour of 45 mu M, occupies a large volume (4.5x10(4) km(3)) during the beginning of austral winter and a minimum (3.5x10(4) km(3)) at the end of spring, just 1 and 2 months after the southward transport of the Peru-Chile Undercurrent (PCUC) is maximum and minimum, respectively. We showed that the PCUC significantly impacts the alongshore advection of dissolved oxygen... |
| Tipo: Text |
Palavras-chave: Oxygen minimum zone; Eddy fluxes; Peru-Chile Undercurrent; Oxygen budget; Eastern South Pacific. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00688/79991/82948.pdf |
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| Maes, Christophe; Dewitte, Boris; Sudre, Joel; Garcon, Veronique; Varillon, David. |
| The small-scale features in sea surface temperature and salinity fields (SST and SSS) of the Coral Sea are examined using high horizontal spatial and short-term temporal in situ measurements. These features are extracted from thermosalinographs (TSGs) gathered onboard commercial and research vessels and at one long-term fixed station. The analyses are performed along the vessel tracks and the structures of small-scale features are extracted by high-pass spatial filtering the original TSG data. For SSS, it is shown that the features at the scale of mesoscale eddies (approximate to 100 km) vary from about -1.1 to +0.6 psu in the Coral Sea region. Processes sustaining such range include rainfall events, stirring by mesoscale eddies, and the latitudinal... |
| Tipo: Text |
Palavras-chave: In situ observations; SST; SSS; Coral Sea. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00218/32960/31618.pdf |
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| Arndt, D. S.; Blunden, J.; Hartfield, G.; Ackerman, Steven A.; Adler, Robert; Alfaro, Eric J.; Allan, Richard P.; Allan, Rob; Alves, Lincoln M.; Amador, Jorge A.; Andreassen, L. M.; Argueez, Anthony; Arndt, Derek S.; Azorin-molina, Cesar; Baez, Julian; Bardin, M. U.; Barichivich, Jonathan; Baringer, Molly O.; Barreira, Sandra; Baxter, Stephen; Beck, H. E.; Becker, Andreas; Bedka, Kristopher M.; Bell, Gerald D.; Belmont, M.; Benedetti, Angela; Berrisford, Paul; Berry, David I.; Bhatt, U. S.; Bissolli, Peter; Bjerke, J.; Blake, Eric S.; Bosilovich, Michael G.; Boucher, Olivier; Box, J. E.; Boyer, Tim; Braathen, Geir O.; Bromwich, David H.; Brown, R.; Buehler, S.; Bulygina, Olga N.; Burgess, D.; Calderon, Blanca; Camargo, Suzana J.; Campbell, Jayaka D.; Cappelen, J.; Carrea, Laura; Carter, Brendan R.; Chambers, Don P.; Cheng, Ming-dean; Christiansen, Hanne H.; Christy, John R.; Chung, E. -s.; Clem, Kyle R.; Coelho, Caio A. S.; Coldewey-egbers, Melanie; Colwell, Steve; Cooper, Owen R.; Copland, L.; Crouch, Jake; Davis, Sean M.; De Eyto, Elvira; De Jeu, Richard A. M.; De Laat, Jos; Degasperi, Curtis L.; Degenstein, Doug; Demircan, M.; Derksen, C.; Di Girolamo, Larry; Diamond, Howard J.; Dlugokencky, Ed J.; Dohan, Kathleen; Dokulil, Martin T.; Dolman, A. Johannes; Domingues, Catia M.; Donat, Markus G.; Dong, Shenfu; Dorigo, Wouter A.; Drozdov, D. S.; Dunn, Robert J. H.; Dutton, Geoff S.; Elkharrim, M.; Elkins, James W.; Epstein, H. E.; Espinoza, Jhan C.; Famiglietti, James S.; Farrell, S.; Fausto, R. S.; Feely, Richard A.; Feng, Z.; Fenimore, Chris; Fettweis, X.; Fioletov, Vitali E.; Flemming, Johannes; Fogt, Ryan L.; Folland, Chris; Forbes, B. C.; Foster, Michael J.; Francis, S. D.; Franz, Bryan A.; Frey, Richard A.; Frith, Stacey M.; Froidevaux, Lucien; Ganter, Catherine; Gerland, S.; Gilson, John; Gobron, Nadine; Goldenberg, Stanley B.; Goni, Gustavo; Grooss, J. -u.; Gruber, Alexander; Guard, Charles; Gupta, S. K.; Gutierrez, J. M.; Haas, C.; Hagos, S.; Hahn, Sebastian; Haimberger, Leo; Hall, Brad D.; Halpert, Michael S.; Hamlington, Benjamin D.; Hanna, E.; Hanssen-bauer, I; Harris, Ian; Heidinger, Andrew K.; Heim, Richard R., Jr.; Hendricks, S.; Hernandez, Marieta; Hernandez, Rafael; Hidalgo, Hugo G.; Ho, Shu-peng; Hobbs, William R.; Huang, Boyin; Hurst, Dale F.; Ialongo, I.; Ijampy, J. A.; Inness, Antje; Isaksen, K.; Ishii, Masayoshi; Jevrejeva, Svetlana; Jimenez, C.; Jin Xiangze,; John, Viju; Johns, William E.; Johnsen, B.; Johnson, Bryan; Johnson, Gregory C.; Johnson, Kenneth S.; Jones, Philip D.; Jumaux, Guillaume; Kabidi, Khadija; Kaiser, J. W.; Kato, Seiji; Kazemi, A.; Keller, Linda M.; Kennedy, John; Kerr, Kenneth; Kholodov, A. L.; Khoshkam, Mahbobeh; Killick, Rachel; Kim, Hyungjun; Kim, S. -j.; Klotzbach, Philip J.; Knaff, John A.; Kohler, J.; Korhonen, Johanna; Korshunova, Natalia N.; Kramarova, Natalya; Kratz, D. P.; Kruger, Andries; Kruk, Michael C.; Krumpen, T.; Lakatos, M.; Lakkala, K.; Lander, Mark A.; Landschuetzer, Peter; Landsea, Chris W.; Lankhorst, Matthias; Lazzara, Matthew A.; Leuliette, Eric; L'Heureux, Michelle; Lieser, Jan L.; Lin, I-i; Liu, Hongxing; Liu, Yinghui; Locarnini, Ricardo; Loeb, Norman G.; Long, Craig S.; Lorrey, Andrew M.; Loyola, Diego; Lumpkin, Rick; Luo, Jing-jia; Luojus, K.; Lyman, John M.; Macias-fauria, M.; Malkova, G. V.; Manney, G.; Marchenko, S. S.; Marengo, Jose A.; Marra, John J.; Marszelewski, Wlodzimierz; Martens, B.; Martinez-gueingla, Rodney; Massom, Robert A.; May, Linda; Mayer, Michael; Mazloff, Matthew; Mcbride, Charlotte; Mccabe, M. F.; Mccarthy, M.; Mcvicar, Tim R.; Mears, Carl A.; Meier, W.; Mekonnen, A.; Mengistu Tsidu, G.; Menzel, W. Paul; Merchant, Christopher J.; Meredith, Michael P.; Merrifield, Mark A.; Miralles, Diego G.; Mitchum, Gary T.; Mitro, Srkani; Monselesan, Didier; Montzka, Stephen A.; Mora, Natalie; Morice, Colin; Mote, T.; Mudryk, L.; Muehle, Jens; Mullan, A. Brett; Mueller, R.; Nash, Eric R.; Nerem, R. Steven; Newman, Louise; Newman, Paul A.; Nieto, Juan Jose; Noetzli, Jeannette; O'Neel, S.; Osborn, Tim J.; Overland, J.; Oyunjargal, Lamjav; Park, E-hyung; Pasch, Richard J.; Pascual-ramirez, Reynaldo; Paterson, Andrew M.; Pearce, Petra R.; Pelto, Mauri S.; Perkins-kirkpatrick, Sarah E.; Perovich, D.; Petropavlovskikh, Irina; Pezza, Alexandre B.; Phillips, C.; Phillips, David; Phoenix, G.; Pinty, Bernard; Rajeevan, Madhavan; Rayner, Darren; Raynolds, M. K.; Reagan, James; Reid, Phillip; Reimer, Christoph; Remy, Samuel; Revadekar, Jayashree V.; Richter-menge, J.; Rimmer, Alon; Robinson, David A.; Rodell, Matthew; Romanovsky, Vladimir E.; Ronchail, Josyane; Rosenlof, Karen H.; Roth, Chris; Rusak, James A.; Sallee, Jean-bapiste; Sanchez-lugo, Ahira; Santee, Michelle L.; Sawaengphokhai, P.; Sayouri, Amal; Scambos, Ted A.; Schladow, S. Geoffrey; Schmid, Claudia; Schmid, Martin; Schreck, Carl J., Iii; Schuur, Ted; Selkirk, H. B.; Send, Uwe; Sensoy, Serhat; Sharp, M.; Shi, Lei; Shiklomanov, Nikolai I.; Shimaraeva, Svetlana V.; Siegel, David A.; Signorini, Sergio R.; Sima, Fatou; Simmons, Adrian J.; Smeed, David A.; Smeets, C. J. P. P.; Smith, Adam; Smith, Sharon L.; Soden, B.; Spence, Jaqueline M.; Srivastava, A. K.; Stackhouse, Paul W., Jr.; Stammerjohn, Sharon; Steinbrecht, Wolfgang; Stella, Jose L.; Stephenson, Tannecia S.; Strahan, Susan; Streletskiy, Dimitri A.; Sun-mack, Sunny; Swart, Sebastiaan; Sweet, William; Tamar, Gerard; Taylor, Michael A.; Tedesco, M.; Thoman, R. L.; Thompson, L.; Thompson, Philip R.; Timmermans, M. -l.; Tobin, Skie; Trachte, Katja; Trewin, Blair C.; Trotman, Adrian R.; Tschudi, M.; Van As, D.; Van De Wal, R. S. W.; Van Der Schalie, Robin; Van Der Schrier, Gerard; Van Der Werf, Guido R.; Van Meerbeeck, Cedric J.; Velicogna, I.; Verburg, Piet; Vincent, Lucie A.; Voemel, Holger; Vose, Russell S.; Wagner, Wolfgang; Walker, D. A.; Walsh, J.; Wang, Bin; Wang, Chunzai; Wang, Junhong; Wang, Lei; Wang, M.; Wang, Sheng-hung; Wanninkhof, Rik; Watanabe, Shohei; Weber, Mark; Weller, Robert A.; Weyhenmeyer, Gesa A.; Whitewood, Robert; Wiese, David N.; Wijffels, Susan E.; Wilber, Anne C.; Wild, Jeanette D.; Willett, Kate M.; Willis, Josh K.; Wolken, G.; Wong, Takmeng; Wood, E. F.; Woolway, R. Iestyn; Wouters, B.; Xue, Yan; Yin, Xungang; Yu, Lisan; Zambrano, Eduardo; Zhang, Huai-min; Zhang, Peiqun; Zhao, Guanguo; Zhao, Lin; Ziemke, Jerry R.; Abernethy, R.; Albanil, Encarnacion Adelina; Aldeco, Laura S.; Aliaga-nestares, Vannia; Anderson, John; Armitage, C.; Avalos, Grinia; Behe, Carolina; Bellouin, Nicolas; Bernhard, G. H.; Blenkinsop, Stephen; Bolmgren, K.; Bouchon, Marilu; Campbell, Ethan C.; Castro, Anabel; Costanza, Carol; Covey, Curt; Coy, Lawrence; Cronin, T.; Cruzado, Luis; Daniel, Raychelle; Davletshin, S. G.; De La Cour, Jacqueline L.; Deline, P.; Dewitte, Boris; Dhurmea, R.; Dickerson, C.; Domingues, Ricardo; Durre, Imke; Eakin, C. Mark; Farmer, J.; Fauchald, P.; Geiger, Erick F.; Gomez, Andrea M.; Gugliemin, Mario; Hansen, K.; Helfrich, S.; Hemming, D. L.; Heron, Scott F.; Heuze, C.; Horstkotte, T.; Hubert, Daan; Hueuze, Celine; Ibrahim, M. M.; Isaac, Victor; Jacobs, Stephanie J.; Jeffries, Martin O.; Karakoylu, Erdem M.; Khan, M. S.; Ladd, C.; Lavado-casimiro, Waldo; Lee, S. -e; Lee, T. C.; Li, Bailing; Li, Tim; Lopez, Luis A.; Luthcke, S.; Marcellin, Vernie; Marin, Dora; Marsh, Benjamin L.; Martin, A; Martinez, Alejandra G.; Martinez-sanchez, Odalys; Meijers, Andrew J. S.; Miller, Ben; Moat, Ben; Mochizuki, Y.; Mosquera-vasquez, Kobi; Mostafa, Awatif E.; Nielsen-gammon, John W.; Noll, Ben E.; Osborne, Emily; Pastor, Saavedra Maria Asuncion; Paulik, Christoph; Peltier, Alexandre; Pinzon, J.; Po-chedley, S.; Polashenski, C.; Purkey, Sarah G.; Quispe, Nelson; Rakotoarimalala, C.; Richardson, A. D.; Ricker, R; Rodriguez, Camino Ernesto; Rosner, Benjamin; Roth, David Mark; Rutishauser, T.; Sasgen, L.; Sayad, T. A.; Scanlon, T.; Schenzinger, Verena; Silow, Eugene; Skirving, William J.; Sofieva, Viktoria; Sparks, T. H.; Spillane, Sandra; Stanitski, Diane M.; Stengel, M.; Stephenson, Kimberly; Strong, Alan E.; Sutton, Adrienne J.; Takahashi, Kenneth S.; Thackeray, S. J.; Thomson, Lthorsteinsson T.; Timbal, Bertrand; Timofeyev, Maxim A.; Tirak, Kyle, V; Togawa, H.; Tommervik, H.; Tourpali, Kleareti; Trinanes, Joaquin A.; Tucker, C. J.; Tye, Mari R.; Van Der A, Ronald J.; Velden, Christopher S.; Vickers, H.; Webster, M.; Westberry, Toby K.; Widlansky, Matthew J.; Wood, K.; Yoon, Huang; York, A.; Zhu, Zhiwei; Ziel, R.; Ziese, Markus G.. |
| In 2017, the dominant greenhouse gases released into Earth’s atmosphere—carbon dioxide, methane, and nitrous oxide— reached new record highs. The annual global average carbon dioxide concentration at Earth’s surface for 2017 was 405.0 ± 0.1 ppm, 2.2 ppm greater than for 2016 and the highest in the modern atmospheric measurement record and in ice core records dating back as far as 800 000 years. The global growth rate of CO2 has nearly quadrupled since the early 1960s. With ENSO-neutral conditions present in the central and eastern equatorial Pacific Ocean during most of the year and weak La Niña conditions notable at the start and end, the global temperature across land and ocean surfaces ranked as the second or third highest, depending on the dataset,... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00677/78863/81163.pdf |
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