Migrating Zooplankton

Diel Vertical Migration (DVM) of zooplankton has been widely recognized as an important factor contributing to the carbon sink. DVM is driven by the predatory pressure on zooplankton during daylight, leading to migration depths ranging between 200m and 800m. The amount of active transport compared to passive gravitational flux is estimated to be between 15% and 40% at present. DVM is not included into OGCBMs due to its complexity, variability and poor characterization, in line with other processes in the twilight zone. This poster was presented at the Ocean Sciences Conference 2016 in New Orleans, US.

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ISI-MGClimDeX Partners

The partners of the ISI-MGClimDeX project are distributed in metropolitan France and overseas. Mainland research institutes are located in Paris and Toulouse, whereas partners in Lesser Antilles are based in Martinique and Guadeloupe. This infographic was part of the contribution to a FEDER project proposal.

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ISI-MGClimDeX Project

The Martinique and Guadeloupe Climate Downscaling eXperiment project covers a broad range of topics concerning the climate change effects on Lesser Antilles. The scope of the working packages (WP) and their connections to data sources and impact analysis within the context of adaptation and mitigation policies is summarized here. This infographic was part of the contribution to a FEDER project proposal.

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PISCES model diagram

PISCES is a biogeochemical model with five nutrients (NO3-, NH4+, PO4, Si and Fe), two phytoplankton groups (diatoms and nanophytoplankton), two zooplankton groups (micro and mesozooplankton), and two non-living compartments (particulate and dissolved organic matter pools). Phytoplankton growth is limited by nutrient availability and light. This model diagram has been included into Aumont et al., in prep.

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History of ocean biogeochemical models

Ocean biogeochemical models are a useful tool to explore present state and future changes in the marine realm. Models allow us to study the different interactions in ocean biogeochemistry between systems of several elements under different but combined physical, chemical and biological forcings. This diagram contributed to the article “Impact of climate change on marine ecosystems” from Vogt et al., in prep.

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The Future N-cycle

The marine N-cycle remains as one of the most unknown biogeochemical cycles in the ocean realm. With a pivotal role from the global climate perspective, the main mechanisms and their future evolution were summarized and explained at the Laboratoire des Sciences du Climat et de l’Environnement (LSCE) in Paris, France.

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Oceanic N2O emissions

N2O is a powerful greenhouse gas and an ozone depletion agent. One third of the total N2O emissions comes from the ocean, where N2O is produced and outgassed to the atmosphere. A model estimate of future N2O sea-to-air emissions, together with changes of the main production mechanisms in 2100 was presented at the European General Assembly in Vienna, Austria.

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Future marine N2-fixation in CMIP5 models

Ocean biogeochemical models are in the awakening of making future estimations of nitrogen fixation rates, a largely unknown process from many perspectives. This preliminary evaluation of the Coupled Model Intercomparison Project (CMIP5) models performance was presented at the Greencycles II Miniconference Impacts of Climate Change on Marine Ecosystems at Universite Pierre et Marie Curie (UPMC) in Paris, France.

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Next generation of the IPSL Earth System Model

The french Institute Pierre Simon Laplace (IPSL) demanded at the MISTERRE Seminar the most recent advances which could be potentially incorporated into future generation atmosphere-biosphere-ocean coupled model simulations. This summary on the progress on the N-cycle was presented at the CNRS Chateau in Gif-sur-Yvette, France.

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N-cycle in ocean models

Climate change projections have triggered an enormous progress on developing global ocean models. Other greenhouse gases than CO2 or CH4 such as nitrous oxide (N2O) have been steadily incorporated into the usual model output. Uncertainties and future estimations of the oceanic N2O emissions were presented at the Eidgenoessische Technische Hochschule (ETH) Zuerich in Zuerich, Switzerland.

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Greencycles II Project Mid-term Meeting

Researchers from the Greencycles II Project, Feedbacks in the Earth System, met the European Commission to report about our personal profiles, current work and future perspectives in research. This slides were a combination of all this subjects and were presented at the Observatoire de Paris, France.

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The N-cycle in PISCES model

The representation of the Nitrogen cycle is a complex yet beautiful topic in ocean biogeochemical models. The different modules and forcings considered within the french model in studying nitrous oxide were sketched in an intuitive fashion and presented at the Biogeochimie Marine et Climat (BIOMAC) department at the LSCE in Paris, France.

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Eddies in the Southern Ocean

The project design and planning was the final part of the MSc. in Applied Physical Oceanography. A summary of the current approaches and mathematical background in charaterizing eddies in the Southern Ocean was presented prior to the actual modeling work at the British Antarctic Survey. This work was presented at the School of Ocean Sciences at the Bangor University facilities in Menai Bridge, UK.

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West Antarctic Ice Sheet

“How likely is it that the West Antarctic Ice Sheet (WAIS) will collapse in the future?” was the title of the Climate & Climate Change assignment in the MSc. in Applied Physical Oceanography. The layout described the uncertainties associated with the main mechanisms leading to a potential melting of the WAIS. This work was presented at the School of Ocean Sciences in Menai Bridge, UK.

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