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Annabel Rixen et Marine Jourdren |
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CEFE, CNRS- Journée du département BIOCON: 11 Avril 2014 “Les impacts socio-économiques de l'exploitation minière en Arctique Canadien: Une étude comparative entre Qamani'tuaq, Nunavut, and Kangiqsujuaq, Nunavik” |
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2014 |
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1193 |
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5654 |
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Sylvie Blangy & Anna Deffner |
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Mining impacts on caribou livelihood in Baker Lake. ICASS VII, International Congress of Arctic Social Sciences- University of Northern British Columbia. Prince George, British Columbia CANADA- May 22 – 26, 2014 |
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2014 |
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1193 |
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5645 |
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Marine Jourdren, Sylvie Blangy et Annabel Rixen |
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Regards Croisés sur l'emploi et la contribution effective de la mine au développement d'une communauté Inuit au Nunavik. village de Kangiqsujuaq et Mines de Raglan et Expo. Séminaire annuel du Labex DRIIHM et du réseau des OHM (Observatoire Hommes Milieux)- 18 et 19 juin 2014 |
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Conference - National - Communication |
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2014 |
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1193 |
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5644 |
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Jumelet J., P. Keckhut, J.P. Vernier, F. Fierli |
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DDU PSC lidar observations, comparisons with spaceborne lidar, SPAC PSC Workshop, Zürich, August 2014 |
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Conference - International - Communication |
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2014 |
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209 |
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yes |
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5641 |
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Park Young-Hyang, Durand Isabelle, Kestenare Elodie, Rougier Gilles, Zhou Meng, d'Ovidio Francesco, Cotté Cédric, Lee Jae-Hak, |
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Title |
Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
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Book Chapter |
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2014 |
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Journal of Geophysical Research: Oceans |
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119 |
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10 |
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6575-6592 |
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Polar Front, Kerguelen, Southern Ocean, 4207 Arctic and Antarctic oceanography, 4528 Fronts and jets, |
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The circulation of iron-rich shelf waters around the Kerguelen Islands plays a crucial role for a climatically important, annually recurrent phytoplankton spring bloom over the sluggish shelf region and its downstream plume area along the Antarctic circumpolar flow. However, there is a long-standing confusion about the Polar Front (PF) in the Kerguelen region due to diverse suggestions in the literature for its geographical location with an extreme difference over 10° of latitude. Based on abundant historical hydrographic data, the in situ hydrographic and current measurements during the 2011 KEOPS2 cruise, satellite chlorophyll images, and altimetry-derived surface velocity fields, we determine and validate an up-to-date location of the PF around the Kerguelen Islands. Artificial Lagrangian particle trajectories computed from altimetric velocity time series are analyzed for the possible pathways and sources of different surface/subsurface waters advected into the chlorophyll bloom area east off the islands studied during the KEOPS2 cruise. The PF location determined as the northernmost boundary of the Winter Water colder than 2°C, which is also associated with a band of strong currents, appears to be primarily controlled by topography. The PF rounds the Kerguelen Islands from the south to deflect northward along the eastern escarpment up to the northeastern corner of the Kerguelen Plateau before making its southward retroflection. It is shown that the major surface/subsurface waters found within the deep basin east of the Kerguelen Islands originate from the shelf around the Heard Island, rather than from the shallow shelf north of the Kerguelen Islands. |
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688,1061 |
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Bachelor's thesis |
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2169-9291 |
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yes |
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5628 |
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Author |
Ferrari Ramiro, Provost Christine, Park Young-Hyang, Sennéchael Nathalie, Koenig Zoé, Sekma Hela, Garric Gilles, Bourdallé-Badie Romain, |
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Title |
Heat fluxes across the Antarctic Circumpolar Current in Drake Passage: Mean flow and eddy contributions
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Journal Article |
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2014 |
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Journal of Geophysical Research: Oceans |
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119 |
Issue |
9 |
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6381-6402 |
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Antarctic Circumpolar Current, heat fluxes, Drake Passage, current meter moorings, high-resolution model, 4532 General circulation, |
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In contrast to a long-standing belief, observations in the Antarctic Circumpolar Current (ACC) show that mean velocity vectors rotate with depth, thus suggesting a possible importance of the time-mean flow for the local poleward heat transport. The respective contributions of the eddy and mean flows to the heat flux across the ACC in Drake Passage (DP) are investigated using recently acquired and historical time series of velocity and temperature from a total of 24 current meter moorings and outputs of a high-resolution (1/12°) model with realistic topography. Only 11 out of the 24 depth-integrated eddy heat flux estimates are found to be significant, and they are poleward. Model depth-integrated eddy heat fluxes have similar signs and amplitudes as the in situ estimates at the mooring sites. They are mostly poleward or nonsignificant, with amplitude decreasing to the south. The cross-stream temperature fluxes caused by the mean flow at the moorings have a sign that varies with location and corresponds to the opposite of the vertical velocity estimates. The depth-integrated temperature fluxes due to the mean flow in the model exhibit small spatial scales and are of opposite sign to the bottom vertical velocities. This suggests that the rotation of the mean velocity vectors with depth is mainly due to bottom topography. The rough hilly topography in DP likely promotes the small-scale vertical velocities and temperature fluxes. Eddy heat fluxes and cross-stream temperature fluxes are integrated over mass-balanced regions defined by the model transport streamlines. The contribution of the mean flow to the ocean heat fluxes across the Southern ACC Front in DP (covering about 4% of the circumpolar longitudes) is about four times as large as the eddy heat flux contribution and the sum of the two represent on the order of 10% of the heat loss to the atmosphere south of 60°S.
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1061 |
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5602 |
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Zoé Koenig, Christine Provost, Ramiro Ferrari, Nathalie Sennéchael, and Young-Hyang Park |
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Title |
A 20-year long volume transport time series of the Antarctic Circumpolar Current obtained from in situ and satellite observations. Part II : Analysis of the variations |
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Conference - International - Poster |
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2014 |
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1061 |
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5594 |
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Ramiro Ferrari, Christine Provost, Young Hyang Park, Nathalie Sennéchael, Gilles Garric, and Romain Bourdallé-Badie |
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Title |
Heat fluxes across the Antarctic Circumpolar Current |
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2014 |
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5583 |
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Ramiro Ferrari, Christine Provost, Young Hyang Park, Nathalie Sennéchael, Hela Sekma, and Gilles Garric |
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Title |
Heat fluxes in the Drake Passage |
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2014 |
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1061 |
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5577 |
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Gyundo Pak,Young-Hyang Park, Frédéric Vivier, Young-Oh Kwon, Kyung-Il Chang1 |
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Title |
Regime-dependent nonstationary relationship between the East Asian winter monsoon and North Pacific Oscillation |
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Conference - International - Poster |
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2014 |
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5572 |
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