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| Author | Bas J. H. Van de Wiel, Etienne Vignon, Peter Baas, Ivo G. S. van Hooijdonk, Steven J. A. van der Linden, J. Antoon van Hooft, Fred C. Bosveld, Stefan R. de Roode, Arnold F. Moene, Christophe Genthon | ||||
| Title | Regime Transitions in Near-Surface Temperature Inversions: A Conceptual Model | Type | Journal | ||
| Year | 2017 | Publication | Journal of the atmospheric sciences | Abbreviated Journal | |
| Volume | 74 | Issue | 4 | Pages | 1057-1073 |
| Keywords | |||||
| Abstract | A conceptual model is used in combination with observational analysis to understand regime transitions of near-surface temperature inversions at night as well as in Arctic conditions. The model combines a surface energy budget with a bulk parameterization for turbulent heat transport. Energy fluxes or feedbacks due to soil and radiative heat transfer are accounted for by a ?lumped parameter closure,? which represents the ?coupling strength? of the system.Observations from Cabauw, Netherlands, and Dome C, Antarctica, are analyzed. As expected, inversions are weak for strong winds, whereas large inversions are found under weak-wind conditions. However, a sharp transition is found between those regimes, as it occurs within a narrow wind range. This results in a typical S-shaped dependency. The conceptual model explains why this characteristic must be a robust feature. Differences between the Cabauw and Dome C cases are explained from differences in coupling strength (being weaker in the Antarctic). For comparison, a realistic column model is run. As findings are similar to the simple model and the observational analysis, it suggests generality of the results.Theoretical analysis reveals that, in the transition zone near the critical wind speed, the response time of the system to perturbations becomes large. As resilience to perturbations becomes weaker, it may explain why, within this wind regime, an increase of scatter is found. Finally, the so-called heat flux duality paradox is analyzed. It is explained why numerical simulations with prescribed surface fluxes show a dynamical response different from more realistic surface-coupled systems. | ||||
| Programme | 1013 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0022-4928 | ISBN | 0022-4928 | Medium | |
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 6570 | |||
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| Author | Benjamin Pohl, Thomas Saucède, Vincent Favier, Julien Pergaud, Deborah Verfaillie, Jean-Pierre Féral, Ylber Krasniqi, Yves Richard | ||||
| Title | Recent Climate Variability around the Kerguelen Islands (Southern Ocean) Seen through Weather Regimes | Type | Journal | ||
| Year | 2021 | Publication | Journal of Applied Meteorology and Climatology | Abbreviated Journal | |
| Volume | 60 | Issue | 5 | Pages | 711-731 |
| Keywords | |||||
| Abstract | Daily Weather Regimes Are Defined Around The Kerguelen Islands (Southern Ocean) On The Basis Of Daily 500-hpa Geopotential Height Anomalies Derived From The Era5 Ensemble Reanalysis Over The Period 1979–2018. Ten Regimes Are Retained As Significant. Their Occurrences Are Highly Consistent Across Reanalysis Ensemble Members. Regimes Show Weak Seasonality And Nonsignificant Long-term Trends In Their Occurrences. Their Sequences Are Usually Short (1–3 Days), With Extreme Persistence Values Above 10 Days. Seasonal Regime Frequency Is Mostly Driven By The Phase Of The Southern Annular Mode Over Antarctica, Midlatitude Dynamics Over The Southern Ocean Such As The Pacific–south American Mode, And, To A Lesser Extent, Tropical Variability, With Significant But Weaker Relationships With El Niño–southern Oscillation. At The Local Scale Over The Kerguelen Islands, Regimes Have A Strong Influence On Measured Atmospheric And Oceanic Variables, Including Minimum And Maximum Air Temperature, Mostly Driven By Horizontal Advections, Seawater Temperature Recorded 5 M Below The Surface, Wind Speed, And Sea Level Pressure. Relationships Are Weaker For Precipitation Amounts. Regimes Also Modify Regional Contrasts Between Observational Sites In Kerguelen, Highlighting Strong Exposure Contrasts. The Regimes Allow Us To Improve Our Understanding Of Weather And Climate Variability And Interactions In This Region; They Will Be Used In Future Work To Assess Past And Projected Long-term Circulation Changes In The Southern Midlatitudes. | ||||
| Programme | 688,1044,1048 | ||||
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| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1558-8424 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 8003 | |||
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| Author | Rabier Florence, Bouchard Aurélie, Brun Eric, Doerenbecher Alexis, Guedj Stéphanie, Guidard Vincent, Karbou Fatima, Peuch Vincent-Henri, Amraoui Laaziz El, Puech Dominique, Genthon Christophe, Picard Ghislain, Town Michael, Hertzog Albert, Vial François, Cocquerez Philippe, Cohn Stephen A, Hock Terry, Fox Jack, Cole Hal, Parsons David, Powers Jordan, Romberg Keith, VanAndel Joseph, Deshler Terry, Mercer Jennifer, Haase Jennifer S, Avallone Linnea, Kalnajs Lars, Mechoso C Roberto, Tangborn Andrew, Pellegrini Andrea, Frenot Yves, Thépaut Jean-Noël, McNally Anthony, Balsamo Gianpaolo, Steinle Peter, | ||||
| Title | The Concordiasi Project in Antarctica | Type | Journal Article | ||
| Year | 2010 | Publication | BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY | Abbreviated Journal | |
| Volume | 91 | Issue | 1 | Pages | 69-85 |
| Keywords | |||||
| Abstract | Abstract The Concordiasi project is making innovative observations of the atmosphere above Antarctica. The most important goals of the Concordiasi are as follows: To enhance the accuracy of weather prediction and climate records in Antarctica through the assimilation of in situ and satellite data, with an emphasis on data provided by hyperspectral infrared sounders. The focus is on clouds, precipitation, and the mass budget of the ice sheets. The improvements in dynamical model analyses and forecasts will be used in chemical-transport models that describe the links between the polar vortex dynamics and ozone depletion, and to advance the understanding of the Earth system by examining the interactions between Antarctica and lower latitudes.To improve our understanding of microphysical and dynamical processes controlling the polar ozone, by providing the first quasi-Lagrangian observations of stratospheric ozone and particles, in addition to an improved characterization of the 3D polar vortex dynamics. Tech...
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| Programme | 1013 | ||||
| Campaign | |||||
| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-0007 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 482 | |||
| Permanent link to this record | |||||
| Author | Smet Willem H De, | ||||
| Title | Description of Pseudingolfiella possessionis n. sp. (Crustacea, Amphipoda) from sub-Antarctic Île de La Possession, Crozet archipelago: the second freshwater amphipod known from the Antarctic biome, a human introduction of Gondwanan ancestry? | Type | Journal Article | ||
| Year | 2015 | Publication | Zootaxa | Abbreviated Journal | |
| Volume | 3941 | Issue | 2 | Pages | 221-38 |
| Keywords | Antarctica, Pseudingolfiella, biogeography, chorology, diversity, | ||||
| Abstract | A new species of freshwater amphipod, Pseudingolfiella possessionis n. sp. (Senticaudata, Pseudingolfiellidae), is described from the submerged moss vegetation of small brooklets at sub-Antarctic Île de La Possession, Crozet archipelago. It constitutes the second freshwater amphipod species known for the sub-Antarctic and Antarctic region, and the fourth member of the genus. The main characters distinguishing it from all congeners are: the spine on the posterior margin of the dactylus, incisor and lamina mobilis of mandible each with 5 teeth, the setation of the maxilliped, the vestigial second article of pleopod 3 in the female, the undulate and laterally notched posterolateral margin of the external ramus of uropods 1 and 2 in the male, the spinulate dorsomedian projection of the telson.
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| Programme | 136 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1175-5326 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 6130 | |||
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| Author | Spée Marion, Marchal Lorène, Thierry Anne-Mathilde, Chastel Olivier, Enstipp Manfred, Maho Yvon Le, Beaulieu Michaël, Raclot Thierry, | ||||
| Title | Exogenous corticosterone mimics a late fasting stage in captive Adélie penguins (Pygoscelis adeliae) | Type | Journal Article | ||
| Year | 2011 | Publication | American Journal of Physiology – Regulatory, Integrative and Comparative Physiology | Abbreviated Journal | |
| Volume | 300 | Issue | 5 | Pages | R1241 -R1249 |
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| Abstract | |||||
| Programme | 137 | ||||
| Campaign | |||||
| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1522-1490 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 180 | |||
| Permanent link to this record | |||||
| Author | Fongy Anaïs, Romestaing Caroline, Blanc Coralie, Lacoste-Garanger Nicolas, Rouanet Jean-Louis, Raccurt Mireille, Duchamp Claude, | ||||
| Title | Ontogeny of muscle bioenergetics in Adélie penguin chicks (Pygoscelis adeliae) | Type | Journal Article | ||
| Year | 2013 | Publication | American Journal of Physiology – Regulatory, Integrative and Comparative Physiology | Abbreviated Journal | AJP Regulatory, Integrative and Comparative Physiology |
| Volume | 305 | Issue | 9 | Pages | R1065-R1075 |
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| Abstract | The ontogeny of pectoralis muscle bioenergetics was studied in growing Adélie penguin chicks during the first month after hatching and compared with adults using permeabilized fibers and isolated mitochondria. With pyruvate-malate-succinate or palmitoyl-carnitine as substrates, permeabilized fiber respiration markedly increased during chick growth (3-fold) and further rose in adults (1.4-fold). Several markers of muscle fiber oxidative activity (cytochrome oxidase, citrate synthase, hydroxyl-acyl-CoA dehydrogenase) increased 6- to 19-fold with age together with large rises in intermyofibrillar (IMF) and subsarcolemmal (SS) mitochondrial content (3- to 5-fold) and oxidative activities (1.5- to 2.4-fold). The proportion of IMF relative to SS mitochondria increased with chick age but markedly dropped in adults. Differences in oxidative activity between mitochondrial fractions were reduced in adults compared with hatched chicks. Extrapolation of mitochondrial to muscle respirations revealed similar figures with isolated mitochondria and permeabilized fibers with carbohydrate-derived but not with lipid-derived substrates, suggesting diffusion limitations of lipid substrates with permeabilized fibers. Two immunoreactive fusion proteins, mitofusin 2 (Mfn2) and optic atrophy 1 (OPA1), were detected by Western blots on mitochondrial extracts and their relative abundance increased with age. Muscle fiber respiration was positively related with Mfn2 and OPA1 relative abundance. Present data showed by two complementary techniques large ontogenic increases in muscle oxidative activity that may enable birds to face thermal emancipation and growth in childhood and marine life in adulthood. The concomitant rise in mitochondrial fusion protein abundance suggests a role of mitochondrial networks in the skeletal muscle processes of bioenergetics that enable penguins to overcome harsh environmental constraints.
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| Programme | 131 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0363-6119 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 4680 | |||
| Permanent link to this record | |||||
| Author | Masaki Kanao; Alessia Maggi; Yoshiaki Ishihara; Eléonore Stutzmann; Masa-Yuki Yamamoto; Genti Toyokuni | ||||
| Title | Characteristic atmosphere-ocean-solid Earth interactions in the Antarctic coastal and marine environment inferred from seismic and infrasound recording at Syowa station, East Antarctica | Type | Journal Article | ||
| Year | 2013 | Publication | Geological Society Special Publication | Abbreviated Journal | |
| Volume | 381 | Issue | Pages | SP381.8 | |
| Keywords | |||||
| Abstract | |||||
| Programme | 133 | ||||
| Campaign | |||||
| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0305-8719 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 4313 | |||
| Permanent link to this record | |||||
| Author | Saucede Thomas, Pierrat Benjamin, Brayard Arnaud, David Bruno, | ||||
| Title | Palaeobiogeography of Austral echinoid faunas: a first quantitative approach | Type | Journal Article | ||
| Year | 2013 | Publication | Geological Society, London, Special Publications | Abbreviated Journal | |
| Volume | 381 | Issue | 1 | Pages | 117-127 |
| Keywords | |||||
| Abstract | Few studies have been devoted to the palaeobiogeography of Antarctic echinoids, all of them analysing and discussing distribution patterns in a qualitative way. The present work aims at exploring the evolution of palaeobiogeographic relationships of Austral echinoid faunas through four time intervals, from the Maastrichtian to the present day, using a quantitative approach: the Bootstrapped Spanning Network procedure. Analyses were successfully performed and improve our knowledge of biogeographic relationships between the different Austral regions. Biogeographic maps were produced that can be easily and intuitively discussed. Our results mostly agree with palaeobiogeographic studies performed on other benthic invertebrates and are congruent with the palaeogeographic evolution of Antarctica. However, two main points markedly contrast with other works: there is no evidence of an Austral provincialism at the end of the Cretaceous and early Cenozoic, and echinoid data suggest isolation of southern Argentina from other Austral regions, including Antarctica, in the Early Miocene. | ||||
| Programme | 1044;1124 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0305-8719 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 4310 | |||
| Permanent link to this record | |||||
| Author | Florent Domine, Gilles Gauthier, Vincent Vionnet, Dominique Fauteux, Marie Dumont, and Mathieu Barrere | ||||
| Title | Snow physical properties may be a significant determinant of lemming population dynamics in the high Arctic – Arctic Science | Type | Journal | ||
| Year | 2018 | Publication | Arctic science | Abbreviated Journal | |
| Volume | 4 | Issue | 4 | Pages | 813-826 |
| Keywords | |||||
| Abstract | Cyclic population fluctuations are common in boreal and Arctic species but the causes of these cycles are still debated today. Among these species, lemmings are Arctic rodents that live and reproduce under the snow and whose large cyclical population fluctuations in the high Arctic impact the whole tundra food web. We explore, using lemming population data and snow modeling, whether the hardness of the basal layer of the snowpack, determined by rain-on-snow events (ROS) and wind storms in autumn, can affect brown lemming population dynamics in the Canadian high Arctic. Using a 7-year dataset collected on Bylot Island, Nunavut, Canada over the period 2003–2014, we demonstrate that liquid water input to snow is strongly inversely related with winter population growth (R2 ≥ 0.62) and to a lesser extent to lemming summer densities and winter nest densities (R2 = 0.29–0.39). ROS in autumn can therefore influence the amplitude of brown lemming population fluctuations. Increase in ROS events with climate warming should strongly impact the populations of lemmings and consequently those of the many predators that depend upon them. Snow conditions may be a key factor influencing the cyclic dynamics of Arctic animal populations. |
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| Programme | 1042 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 7511 | |||
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| Author | Olivier Gilg, Nigel G. Yoccoz | ||||
| Title | Explaining Bird Migration | Type | Journal | ||
| Year | 2010 | Publication | Science | Abbreviated Journal | |
| Volume | 327 | Issue | 5963 | Pages | 276-277 |
| Keywords | |||||
| Abstract | Arctic shorebirds can travel tens of thousands of kilometers every year as they fly along intercontinental flyways from their southern wintering grounds to their remote, harsh breeding sites. How these birds solve the navigational and physiological constraints has been largely answered, but why they migrate is still a question with many possible answers (1). On page 326 of this issue, McKinnon et al. (2) present a continent-wide study that points to predation as a driving mechanism for migration. The study also elucidates the role of predation in shaping Arctic terrestrial biodiversity. Predation pressure falls with increasing latitude, helping to explain why many birds migrate as far north as the high Arctic. Predation pressure falls with increasing latitude, helping to explain why many birds migrate as far north as the high Arctic. | ||||
| Programme | 1036 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0036-8075, 1095-9203 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 7252 | |||
| Permanent link to this record | |||||