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| Martínez-vicente, Víctor; Clark, James R.; Corradi, Paolo; Aliani, Stefano; Arias, Manuel; Bochow, Mathias; Bonnery, Guillaume; Cole, Matthew; Cózar, Andrés; Donnelly, Rory; Echevarría, Fidel; Galgani, Francois; Garaba, Shungudzemwoyo P.; Goddijn-murphy, Lonneke; Lebreton, Laurent; Leslie, Heather A.; Lindeque, Penelope K.; Maximenko, Nikolai; Martin-lauzer, François-régis; Moller, Delwyn; Murphy, Peter; Palombi, Lorenzo; Raimondi, Valentina; Reisser, Julia; Romero, Laia; Simis, Stefan G.h.; Sterckx, Sindy; Thompson, Richard C.; Topouzelis, Konstantinos N.; Van Sebille, Erik Van; Veiga, Joana Mira; Vethaak, A. Dick. |
| Sustained observations are required to determine the marine plastic debris mass balance and to support effective policy for planning remedial action. However, observations currently remain scarce at the global scale. A satellite remote sensing system could make a substantial contribution to tackling this problem. Here, we make initial steps towards the potential design of such a remote sensing system by: (1) identifying the properties of marine plastic debris amenable to remote sensing methods and (2) highlighting the oceanic processes relevant to scientific questions about marine plastic debris. Remote sensing approaches are reviewed and matched to the optical properties of marine plastic debris and the relevant spatio-temporal scales of observation to... |
| Tipo: Text |
Palavras-chave: Remote sensing; Marine plastic debris; Mission requirements; Hyperspectral sensors; Multispectral imagers; High spatial resolution; Sensors synergy; Submesoscale processes. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00589/70077/68050.pdf |
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| Goddijn-murphy, Lonneke; Woolf, David; Chapron, Bertrand; Queffeulou, Pierre. |
| Air-sea gas exchange is affected by sea surface roughness and a previous study shows a significant relation between Ku-band backscattering from satellite altimeters and field estimates of gas transfer velocity, K. Recently C-band backscatter data were made available for altimeters on board the JASON-1 and JASON-2 satellites. In this paper we used experimental data from the same cruises to show that using the difference between the Ku-band and C-band signals to estimate sea surface roughness, and thus reducing the contribution from longer waves, improved the K estimates. This is consistent with the theory that gas transfer is largely controlled by short capillary-gravity waves. For satellite data closer than 2 hr and 0.5 degrees from the K sample stations,... |
| Tipo: Text |
Palavras-chave: Air-sea gas transfer; Satellite altimetry; DMS. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00174/28564/26980.pdf |
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| Shutler, Jamie D.; Land, Peter E.; Piolle, Jean-francois; Woolf, David K.; Goddijn-murphy, Lonneke; Paul, Frederic; Girard-ardhuin, Fanny; Chapron, Bertrand; Donlon, Craig J.. |
| The air-sea flux of greenhouse gases (e.g. carbon dioxide, CO2) is a critical part of the climate system and a major factor in the biogeochemical development of the oceans. More accurate and higher resolution calculations of these gas fluxes are required if we are to fully understand and predict our future climate. Satellite Earth observation is able to provide large spatial scale datasets that can be used to study gas fluxes. However, the large storage requirements needed to host such data can restrict its use by the scientific community. Fortunately, the development of cloud-computing can provide a solution. Here we describe an open source air-sea CO2 flux processing toolbox called the ‘FluxEngine’, designed for use on a cloud-computing infrastructure.... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00309/42034/41333.pdf |
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| Holding, Thomas; Ashton, Ian; Shutler, Jamie D.; Land, Peter E.; Nightingale, Philip D.; Rees, Andrew P.; Brown, Ian; Piolle, Jean-francois; Kock, Annette; Bange, Hermann W.; Woolf, David K.; Goddijn-murphy, Lonneke; Pereira, Ryan; Paul, Frederic; Girard-ardhuin, Fanny; Chapron, Bertrand; Rehder, Gregor; Ardhuin, Fabrice; Donlon, Craig J.. |
| The flow (flux) of climate-critical gases, such as carbon dioxide (CO2), between the ocean and the atmosphere is a fundamental component of our climate and an important driver of the biogeochemical systems within the oceans. Therefore, the accurate calculation of these air–sea gas fluxes is critical if we are to monitor the oceans and assess the impact that these gases are having on Earth's climate and ecosystems. FluxEngine is an open-source software toolbox that allows users to easily perform calculations of air–sea gas fluxes from model, in situ, and Earth observation data. The original development and verification of the toolbox was described in a previous publication. The toolbox has now been considerably updated to allow for its use as a Python... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00598/70983/69247.pdf |
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| Watson, Andrew J.; Schuster, Ute; Shutler, Jamie D.; Holding, Thomas; Ashton, Ian; Landschuetzer, Peter; Woolf, David K.; Goddijn-murphy, Lonneke. |
| The ocean is a sink for similar to 25% of the atmospheric CO2 emitted by human activities, an amount in excess of 2 petagrams of carbon per year (PgCyr(-1)). Time-resolved estimates of global ocean-atmosphere CO2 flux provide an important constraint on the global carbon budget. However, previous estimates of this flux, derived from surface ocean CO2 concentrations, have not corrected the data for temperature gradients between the surface and sampling at a few meters depth, or for the effect of the cool ocean surface skin. Here we calculate a time history of ocean-atmosphere CO2 fluxes from 1992 to 2018, corrected for these effects. These increase the calculated net flux into the oceans by 0.8-0.9 PgC yr(-1), at times doubling uncorrected values. We... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00676/78826/81135.pdf |
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| Van Sebille, Erik; Aliani, Stefano; Law, Kara Lavender; Maximenko, Nikolai; Alsina, José M; Bagaev, Andrei; Bergmann, Melanie; Chapron, Bertrand; Chubarenko, Irina; Cózar, Andrés; Delandmeter, Philippe; Egger, Matthias; Fox-kemper, Baylor; Garaba, Shungudzemwoyo P; Goddijn-murphy, Lonneke; Hardesty, Britta Denise; Hoffman, Matthew J; Isobe, Atsuhiko; Jongedijk, Cleo E; Kaandorp, Mikael L A; Khatmullina, Liliya; Koelmans, Albert A; Kukulka, Tobias; Laufkötter, Charlotte; Lebreton, Laurent; Lobelle, Delphine; Maes, Christophe; Martinez-vicente, Victor; Morales Maqueda, Miguel Angel; Poulain-zarcos, Marie; Rodríguez, Ernesto; Ryan, Peter G; Shanks, Alan L; Shim, Won Joon; Suaria, Giuseppe; Thiel, Martin; Van Den Bremer, Ton S; Wichmann, David. |
| Marine plastic debris floating on the ocean surface is a major environmental problem. However, its distribution in the ocean is poorly mapped, and most of the plastic waste estimated to have entered the ocean from land is unaccounted for. Better understanding of how plastic debris is transported from coastal and marine sources is crucial to quantify and close the global inventory of marine plastics, which in turn represents critical information for mitigation or policy strategies. At the same time, plastic is a unique tracer that provides an opportunity to learn more about the physics and dynamics of our ocean across multiple scales, from the Ekman convergence in basin-scale gyres to individual waves in the surfzone. In this review, we comprehensively... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00610/72213/71011.pdf |
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| Maximenko, Nikolai; Corradi, Paolo; Law, Kara Lavender; Van Sebille, Erik; Garaba, Shungudzemwoyo P.; Lampitt, Richard Stephen; Galgani, Francois; Martinez-vicente, Victor; Goddijn-murphy, Lonneke; Veiga, Joana Mira; Thompson, Richard C.; Maes, Christophe; Moller, Delwyn; Löscher, Carolin Regina; Addamo, Anna Maria; Lamson, Megan R.; Centurioni, Luca R.; Posth, Nicole R.; Lumpkin, Rick; Vinci, Matteo; Martins, Ana Maria; Pieper, Catharina Diogo; Isobe, Atsuhiko; Hanke, Georg; Edwards, Margo; Chubarenko, Irina P.; Rodriguez, Ernesto; Aliani, Stefano; Arias, Manuel; Asner, Gregory P.; Brosich, Alberto; Carlton, James T.; Chao, Yi; Cook, Anna-marie; Cundy, Andrew B.; Galloway, Tamara S.; Giorgetti, Alessandra; Goni, Gustavo Jorge; Guichoux, Yann; Haram, Linsey E.; Hardesty, Britta Denise; Holdsworth, Neil; Lebreton, Laurent; Leslie, Heather A.; Macadam-somer, Ilan; Mace, Thomas; Manuel, Mark; Marsh, Robert; Martinez, Elodie; Mayor, Daniel J.; Le Moigne, Morgan; Molina Jack, Maria Eugenia; Mowlem, Matt Charles; Obbard, Rachel W.; Pabortsava, Katsiaryna; Robberson, Bill; Rotaru, Amelia-elena; Ruiz, Gregory M.; Spedicato, Maria Teresa; Thiel, Martin; Turra, Alexander; Wilcox, Chris. |
| Plastics and other artificial materials pose new risks to the health of the ocean. Anthropogenic debris travels across large distances and is ubiquitous in the water and on shorelines, yet, observations of its sources, composition, pathways, and distributions in the ocean are very sparse and inaccurate. Total amounts of plastics and other man-made debris in the ocean and on the shore, temporal trends in these amounts under exponentially increasing production, as well as degradation processes, vertical fluxes, and time scales are largely unknown. Present ocean circulation models are not able to accurately simulate drift of debris because of its complex hydrodynamics. In this paper we discuss the structure of the future integrated marine debris observing... |
| Tipo: Text |
Palavras-chave: Plastics; Marine debris; Sensor development; Observing network; Ecosystemstressors; Maritime safety. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00511/62272/66477.pdf |
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