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Bailleul Frederic, Vacquie-Garcia Jade, Guinet Christophe, . (2015). Dissolved Oxygen Sensor in Animal-Borne Instruments: An Innovation for Monitoring the Health of Oceans and Investigating the Functioning of Marine Ecosystems.
. PloS one, 10(7), e0132681.
Abstract: The current decline in dissolved oxygen concentration within the oceans is a sensitive indicator of the effect of climate change on marine environment. However the impact of its declining on marine life and ecosystems' health is still quite unclear because of the difficulty in obtaining in situ data, especially in remote areas, like the Southern Ocean (SO). Southern elephant seals (Mirounga leonina) proved to be a relevant alternative to the traditional oceanographic platforms to measure physical and biogeochemical structure of oceanic regions rarely observed. In this study, we use a new stage of development in biologging technology to draw a picture of dissolved oxygen concentration in the SO. We present the first results obtained from a dissolved oxygen sensor added to Argos CTD-SRDL tags and deployed on 5 female elephant seals at Kerguelen. From October 2010 and October 2011, 742 oxygen profiles associated with temperature and salinity measurements were recorded. Whether a part of the data must be considered cautiously, especially because of offsets and temporal drifts of the sensors, the range of values recorded was consistent with a concomitant survey conducted from a research vessel (Keops-2 project). Once again, elephant seals reinforced the relationship between marine ecology and oceanography, delivering essential information about the water masses properties and the biological status of the Southern Ocean. But more than the presentation of a new stage of development in animal-borne instrumentation, this pilot study opens a new field of investigation in marine ecology and could be enlarged in a near future to other key marine predators, especially large fish species like swordfish, tuna or sharks, for which dissolved oxygen is expected to play a crucial role in distribution and behaviour.
Programme: 109
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Bailly S. & Dreux P. (1995). C.R. Acad. Sci. Paris, , 459–464.
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Baker, D.F.; Law, R.M.; Gurney, K.R.; Rayner, P.; Peylin, P.; Denning, A.S.; Bousquet, P.; Bruhwiler, L.; Chen, Y.-H.; Ciais, P.; Fung, I.Y.; Heimann, M.; John, J.; Maki, T.; Maksyutov, S.; Masarie, K.; Prather, M.; Pak, B.; Taguchi, S.; Zhu, Z. (2006). Global biogeochemical cycles, 20.
Keywords: atmospheric inversions; CO 2 fluxes; interannual variability; 0368 Atmospheric Composition and Structure: Troposphere: constituent transport and chemistry; 0322 Atmospheric Composition and Structure: Constituent sources and sinks; 0428 Biogeosciences: Carbon cycling; 0414 Biogeosciences: Biogeochemical cycles, processes, and modeling; 3260 Mathematical Geophysics: Inverse theory
Programme: 439
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. (2017). Late Holocene glacier activity on the Kerguelen Island, South Indian Ocean – reconstructed from distal glacier-fed lake sediments. Bachelor's thesis, , .
Abstract: The Southern Hemisphere`s westerly winds play a vital role in regulating Earth`s climate by shielding Antarctic ice from low latitude heat, driving global ocean circulation and storing vast amounts of CO2. Both strength and position of this globally significant atmospheric pattern are rapidly shifting in the face of ongoing warming. A string of recent studies links these developments to dramatic changes in temperature, precipitation, sea ice extent and cryosphere stability unfolding throughout the Southern Ocean region. Critically, a lack of baseline information restricts our ability to understand the causes and patterns of these shifts and represent them in the future projections that underpin climate policies. Especially in the Southern Ocean, there are few time series recording past climate due to few suitable land areas and the few Sub-Antarctic Islands is remote and has cumbersome logistics. Kerguelen Island is located within the Antarctic Circumpolar Current and the Southern Westerly wind belt and contains several glaciers and smaller ice caps. Terrestrial archives recording past history of the glaciers at Kerguelen thus have a unique potential to record past changes in oceanic and atmospheric circulation patterns from southern mid latitudes. Here we present results from the first distal glacier fed lake study at the Kerguelen Island. A 2.8 m long sediment core was obtained from Lac Guynemer (121masl.), a lake that receives glacial meltwater from Glacier Guynemer at the Pic Guynemer (1188masl.), located at the Peninsule Loranchet at the northern part of Kerguelen Island. The sediment core has been analyzed with highresolution core scanning X-ray fluorescence (XRF), CT scanning, magnetic parameters, loss on ignition and dry bulk density, to reconstruct past glacier variability of Glacier Guynemer. The sediment record covers an interval over c. 1000 – 3500 cal. yr BP and show dynamic glacier variability during the Neoglacial time period, in phase with other glaciers reconstructed from the Southern Hemisphere.
Programme: 1094
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. (2018). Arctic precipitation: Observed trends and changes at Ny-Alesund, Svalbard. Bachelor's thesis, , .
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Balasov Y.A., Peucat J.J., Teben'kov A.M., Ohta Y., Larionov A.N., Sirotkin A. & Bjornerud M. (1996). Rb-Sr whole rock and U-Pb zircon datings of the granitic-gabbroic rocks from the Skalffjellet Subgroup, southwest Spitsbergen. Polar research, 15, 167–1181.
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Baldwin R.T. & Langel R. (1993). Tables and maps of the DGRF 85 and IGRF 90. Iaga bulletin, 54.
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Balis, D., M. Koukouli, K. Garane, A. Bais, J.-c. Lambert, T. Verhoelst, J. Granville, A. Pazmino, F. Goutail, J.-p. Pommereau, A.bazureau, C. Zerefos, . (2018). Validation of total ozone from S5P TROPOMI on a global scale using Brewer and Dobson networks,.
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Ballatore P., Candini M., Bitterly J., Burns G.B., Engebretson M.J. & Lanzerotti L.J. (1996). Study of a Tentative Southern AE Index..
Abstract: IFSI-96-15
Programme: 139
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Ballatore P., Maclennan C.G., Engebretson M.J., Candidi M., Bitterly J., Meng C.I. & Burns G. (1998). A new southern high-latitude index. Annales geophysicae, 16, 1589–1598.
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