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A. Corbeau, J. Collet, F. Orgeret, P. Pistorius, H. Weimerskirch. (2021). Fine-scale interactions between boats and large albatrosses indicate variable susceptibility to bycatch risk according to species and populations (Vol. 24).
Keywords: albatross populations biologging bycatch assessment bycatch risk ecological trap fisheries fishing boat bycatch seabirds
Programme: 109
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. (2021). (Vol. 39).
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O. Alemany, P. Talalay, P. Boissonneau, J. Chappellaz, J. F. Chemin, R. Duphil, E. Lefebvre, L. Piard, P. Possenti, J. Triest. (2021). The SUBGLACIOR drilling probe: hydraulic considerations (Vol. 62).
Abstract: Using significant technological breakthroughs and unconventional approaches, the goal of the in situ probing of glacier ice for a better understanding of the orbital response of climate (SUBGLACIOR) project is to advance ice core research by inventing, constructing and testing an in situ probe to evaluate if a target site is suitable for recovering ice as old as 1.5 million years. Embedding a laser spectrometer, the probe is intended to make its own way down into the ice and to measure, in real time and down to the bedrock, the depth profiles of the ice ?D water isotopes as well as the trapped CH4 gas concentration and dust concentration. The probe descent is achieved through electromechanical drilling combined with continuous meltwater sample production using a central melting finger in the drill head. A key aspect of the project lies in the design and implementation of an efficient method to continuously transfer to the surface the ice chips being produced by the drill head and from the refreezed water expulsed downstream from the melting finger, into the borehole. This paper presents a detailed calculation and analysis of the flow rates and pressure conditions required to overcome friction losses of the drilling fluid and to effectively transport ice chips to the surface.
Keywords: Glaciological instruments and methods ice coring ice engineering paleoclimate
Programme: 119
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Von Beckerath, X., Eitzinger, B., Sittler, B., Gilg, O., Yannic, G., Klein, A.-M., Benadi, G. (2021). Long-term monitoring reveals topographical features and vegetation explain winter habitat use of an Arctic rodent.
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. (2021). (Vol. 33).
Keywords: Antarctic Cold Reversal glacier fluctuations Holocene in situ cosmogenic chlorine-36 dating palaeoclimate sub-Antarctic
Programme: 1048
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. (2021). Evolution of the Cook Ice Cap (Kerguelen Islands) between the last centuries and 2100 ce based on cosmogenic dating and glacio-climatic modelling (Vol. 33).
Abstract: The Cook Ice Cap (CIC) on the sub-Antarctic Kerguelen Islands recently experienced extremely negative surface mass balance. Further deglaciation could have important impacts on endemic and invasive fauna and flora. To put this exceptional glacier evolution into a multi-centennial-scale context, we refined the evolution of the CIC over the last millennium, investigated the associated climate conditions and explored its potential evolution by 2100 ce. A glaciological model, constrained by cosmic ray exposure dating of moraines, historical documents and recent direct mass balance observations, was used to simulate the ice-cap extents during different phases of advance and retreat between the last millennium and 2100 ce. Cosmogenic dating suggests glacial advance around the early Little Ice Age (LIA), consistent with findings from other sub-Antarctic studies, and the rather cold and humid conditions brought about by the negative phase of the Southern Annular Mode (SAM). This study contributes to our currently limited understanding of palaeoclimate for the early LIA in the southern Indian Ocean. Glaciological modelling and observations confirm the recent decrease in CIC extent linked to the intensification of the SAM. Although affected by large uncertainties, future simulations suggest a complete disappearance of CIC by the end of the century.
Keywords: degree-day glaciological model future projections glacial fluctuations in situ cosmogenic chlorine-36 dating moraines sub-Antarctic islands
Programme: 1048
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. (2021). Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid (Vol. 11).
Keywords: Beyond EPICA drilling Estisol ice cores
Programme: 1202
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Niels M. Schmidt, Olivier Gilg, Jon Aars, Rolf A. Ims. (2021). Fat, Furry, Flexible, and Functionally Important: Characteristics of Mammals Living in the Arctic.
Abstract: Mammals constitute a group of vertebrates that share a number of unique characteristics,such as nursing their young with milk, and having hair. The pattern of low mammal species diversity in the Arctic probably reflects a combination of mainly two driving factors: first, being homeotherms, mammals require a substantial amount of energy to sustain the various life processes, and the arctic regions are characterized by a very low availability of energy due to short seasons for primary production. Secondly, the occurrence of arctic mammals today reflects the reinvasion of the mammal species into the Arctic as the ecosystems were re-established following the deglaciation. This chapter discusses the characteristics of the arctic mammals, including their unique adaptations to life, and their role as both consumer and food base in the arctic ecosystems. Climate change in the Arctic may also alter the interactions within food webs.
Keywords: arctic ecosystems Arctic mammals climate change deglaciation food webs homeotherms low mammal species diversity primary production
Programme: 1036
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Samuel Veilleux, Armelle Decaulne, Najat Bhiry. (2021). (Vol. 7).
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. (2021). The ? Pictoris b Hill sphere transit campaign – I. Photometric limits to dust and rings (Vol. 648).
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