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| Author | Dettai A, Lautredou A C, Bonillo C, Goimbault E, Busson F, Causse R, Couloux A, Cruaud C, Duhamel G, Denys G, | ||||
| Title | The actinopterygian diversity of the CEAMARC cruises: Barcoding and molecular taxonomy as a multi-level tool for new findings | Type | Journal Article | ||
| Year | 2011 | Publication | Deep Sea Research Part II: Topical Studies in Oceanography | Abbreviated Journal | Deep Sea Res. Part II Top. Stud. Oceanogr. |
| Volume | 58 | Issue | 1-2 | Pages | 250 -263 |
| Keywords | antarctic zone, barcode, dumont d urville sea, ichthyology, identification, molecular taxonomy, southern ocean, | ||||
| Abstract | In the winter 2007-2008, the CAML-CEAMARC cruises prospected in the Eastern part of the Antarctic continental shelf (Dumont d'Urville Sea, off Terre Ad lie). The Australian R/V “Aurora Australis” and the Japanese R/V “Umitaka Maru” sampled in locations and at depths previously uninvestigated in this region. In total, 538 teleost specimens collected during these cruises were sequenced for the mitochondrial cytochrome oxidase I gene (COI), with the goal of barcoding a representative sampling from the campaign. The efficiency of barcoding for identification has been questioned for some taxonomic groups, thus we compared the COI results for a few of the families and genera included here (genus Trematomus, Artedidraconidae, Liparidae) to results for other markers for the same specimens. To better explore intra- and interspecific variability, sequences from previous campaigns and public databases were added to the analysis for these groups. The congruence among the results for different genes (COI, cytochrome b, D-loop, and the nuclear rhodopsin retrogene) and morphological identification was used to assess the efficiency of the COI dataset at recovering species delimited using other data. Where discrepancies were present among the different data sources, a morphological re-identification was performed.
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| Programme | 1124 | ||||
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Publisher  |
Elsevier | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0967-0645 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 2497 | |||
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| Author | OCHYRA Ryszard, | ||||
| Title | Antipodal mosses: XVI. The first record of the genus Sematophyllum (Sematophyllaceae) in the Subantarctic, with a description of S. lebouvieri sp. nov. | Type | Journal Article | ||
| Year | 2010 | Publication | Cryptogamie. Bryologie | Abbreviated Journal | |
| Volume | 31 | Issue | 3 | Pages | 223 -232 |
| Keywords | Bryophyta, distribution, Îles Kerguelen, Sematophyllaceae, Sematophyllum, Southern Ocean, Subantarctica, taxonomy, Tierra del Fuego, | ||||
| Abstract | Sematophyllum lebouvieri Ochyra is described as a new species from Îles Kerguelen in the Subantarctic and Isla de los Estados in the Tierra del Fuego archipelago in southern South America. The new species is an aquatic moss, closely related to S. secundifolium (Müll. Hal.) Mitt. from Isla Hermite near Cape Horn, but it is distinct at a glance in being a robust plant with larger, broadly ovate or elliptical, not secund leaves which are rounded or obtuse-apiculate to subacute at the apex and have plane to narrowly reflexed margins that are distinctly serrulate at the apex. The discovery of this species on Iles Kerguelen represents a new addition of the genus Sematophyllum and the family Sematophyllaceae to the bryoflora of the Subantarctic.
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| Programme | 136 | ||||
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| Publisher |
Elsevier | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1290-0796 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 2622 | |||
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| Author | Lartaud Franck, Chauvaud Laurent, Richard Joëlle, Toulot Aurore, Bollinger Claire, Testut Laurent, Paulet Yves-Marie, | ||||
| Title | Experimental growth pattern calibration of Antarctic scallop shells (Adamussium colbecki, Smith 1902) to provide a biogenic archive of high-resolution records of environmental and climatic changes | Type | Journal Article | ||
| Year | 2010 | Publication | Journal of Experimental Marine Biology and Ecology | Abbreviated Journal | J. Exp. Mar. Biol. Ecol. |
| Volume | 393 | Issue | 1-2 | Pages | 158 -167 |
| Keywords | biology microbiology, ecology environment, marine sciences, meteorology climatology, | ||||
| Abstract | To determine the potential of Antarctic bivalve shells as biomonitors for environmental and climatic variations in polar marine areas, we developed a growth model for juvenile Adamussium colbecki Smith, 1902 based on the use of in situ temporal calcein markings to calibrate growth patterns in the external striae formation. To minimize scallop stress caused by excessive handling, in situ benthic chambers were used for the marking experiment, during an exposure time of 6 h. Once marked, scallops remained on site in a benthic cage and were collected 18, 26, and 41 days later. Apart from a few specimens affected by possible calcein toxicity effects, the detectable mark in all shells revealed a higher austral summer growth rate for A. colbecki compared to other Antarctic bivalves. Using calcein labeling, we identified a near 14-day periodicity in the striae formation associated with the fortnightly seawater level regime. Striae counting and increment width measurements showed an annual cycle, with no clear cessation of growth in juvenile specimens, allowing age determination. Because of the relatively high growth rate for a polar species and easily recognizable sclerochronological calendar in the shell striae formation, A. colbecki is an appropriate species for high-resolution (infra-monthly) geochemical sampling. Comparison between LA-ICP-MS analyses (Li, B, Mg, Mn, Co, Sr, Ba, Pb) from one shell and hydrological parameters (sea level, temperature, salinity) measured in seawater suggests, however, that more work is needed to calibrate the trace element proxies. Nevertheless, the shell of the Antarctic scallop A. colbecki has tremendous potential for recording environmental conditions from time periods covering months to a few years in polar waters, notably the ice melting date.
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| Programme | 688 | ||||
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| Corporate Author | Thesis | ||||
| Publisher |
Elsevier | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0022-0981 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 2678 | |||
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| Author | Köhler Peter, Bintanja Richard, Fischer Hubertus, Joos Fortunat, Knutti Reto, Lohmann Gerrit, Masson-Delmotte Valérie, | ||||
| Title | What caused Earth's temperature variations during the last 800,000 years? Data-based evidence on radiative forcing and constraints on climate sensitivity | Type | Journal Article | ||
| Year | 2010 | Publication | Quaternary Science Reviews | Abbreviated Journal | Quat Sci Rev |
| Volume | 29 | Issue | 1-2 | Pages | 129 -145 |
| Keywords | |||||
| Abstract | The temperature on Earth varied largely in the Pleistocene from cold glacials to interglacials of different warmths. To contribute to an understanding of the underlying causes of these changes we compile various environmental records (and model-based interpretations of some of them) in order to calculate the direct effect of various processes on Earth's radiative budget and, thus, on global annual mean surface temperature over the last 800,000 years. The importance of orbital variations, of the greenhouse gases CO 2 , CH 4 and N 2 O, of the albedo of land ice sheets, annual mean snow cover, sea ice area and vegetation, and of the radiative perturbation of mineral dust in the atmosphere are investigated. Altogether we can explain with these processes a global cooling of 3.90.8K in the equilibrium temperature for the Last Glacial Maximum (LGM) directly from the radiative budget using only the Planck feedback that parameterises the direct effect on the radiative balance, but neglecting other feedbacks such as water vapour, cloud cover, and lapse rate. The unaccounted feedbacks and related uncertainties would, if taken at present day feedback strengths, decrease the global temperature at the LGM by 8.01.6K. Increased Antarctic temperatures during the Marine Isotope Stages 5.5, 7.5, 9.3 and 11.3 are in our conceptual approach difficult to explain. If compared with other studies, such as PMIP2, this gives supporting evidence that the feedbacks themselves are not constant, but depend in their strength on the mean climate state. The best estimate and uncertainty for our reconstructed radiative forcing and LGM cooling support a present day equilibrium climate sensitivity (excluding the ice sheet and vegetation components) between 1.4 and 5.2K, with a most likely value near 2.4K, somewhat smaller than other methods but consistent with the consensus range of 24.5K derived from other lines of evidence. Climate sensitivities above 6K are difficult to reconcile with Last Glacial Maximum reconstructions.
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| Programme | 458 | ||||
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| Corporate Author | Thesis | ||||
| Publisher |
Elsevier | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0277-3791 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 2712 | |||
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| Author | Thèves C, Biagini P, Crubézy E, | ||||
| Title | The rediscovery of smallpox | Type | Journal Article | ||
| Year | 2014 | Publication | Clinical Microbiology and Infection | Abbreviated Journal | Clin. Microbiol. Infect. |
| Volume | 20 | Issue | 3 | Pages | 210-218 |
| Keywords | |||||
| Abstract | Smallpox is an infectious disease that is unique to humans, caused by a poxvirus. It is one of the most lethal of diseases; the virus variant Variola major has a mortality rate of 30%. People surviving this disease have life-long consequences, but also assured immunity. Historically, smallpox was recognized early in human populations. This led to prevention attempts?variolation, quarantine, and the isolation of infected subjects?until Jenner?s discovery of the first steps of vaccination in the 18th century. After vaccination campaigns throughout the 19th and 20th centuries, the WHO declared the eradication of smallpox in 1980. With the development of microscopy techniques, the structural characterization of the virus began in the early 20th century. In 1990, the genomes of different smallpox viruses were determined; viruses could be classified in order to investigate their origin, diffusion, and evolution. To study the evolution and possible re-emergence of this viral pathogen, however, researchers can only use viral genomes collected during the 20th century. Cases of smallpox in ancient periods are sometimes well documented, so palaeomicrobiology and, more precisely, the study of ancient smallpox viral strains could be an exceptional opportunity. The analysis of poxvirus fragmented genomes could give new insights into the genetic evolution of the poxvirus. Recently, small fragments of the poxvirus genome were detected. With the genetic information obtained, a new phylogeny of smallpox virus was described. The interest in conducting studies on ancient strains is discussed, in order to explore the natural history of this disease. | ||||
| Programme | 1038 | ||||
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| Corporate Author | Thesis | ||||
| Publisher |
Elsevier | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1198-743X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 4905 | |||
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| Author | Liubomira Romanova, Charles Stépanoff, Norbert Telmon, Eric Crubézy | ||||
| Title | Health access inequities and magic medicine: the first ancient evidence? | Type | Journal | ||
| Year | 2020 | Publication | The Lancet | Abbreviated Journal | |
| Volume | 395 | Issue | 10233 | Pages | 1343-1344 |
| Keywords | |||||
| Abstract | Inequities in access to the latest advances in health care and effective drugs constitute public health problems today,1 but was this also the case in ancient societies when practitioners used traditional medicines with limited means? The excavation of frozen graves in Yakutia (present day eastern Siberia, Russia) dating from 1700 CE2 led to the identification of a woman, buried almost naked, covered with a magnificent robe and with half a horse bit in her mouth (figure). The other half of the horse bit was found in the trunk behind her head with her earrings, bracelets, and signet rings. | ||||
| Programme | 1038 | ||||
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| Address | |||||
| Corporate Author | Thesis | Bachelor's thesis | |||
| Publisher |
Elsevier | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | 0140-6736, 1474-547X | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 7666 | |||
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| Author | Chadid M, Vernin J, Mekarnia D, Chapellier E, Trinquet H, Bono G, | ||||
| Title | First Antarctica light curve | Type | Journal Article | ||
| Year | 2010 | Publication | Astronomy and Astrophysics | Abbreviated Journal | 0935-4956 |
| Volume | 516 | Issue | Pages | L15-L15 | |
| Keywords | |||||
| Abstract | Context. In the context of long and continuous time-series photometry and after the MOST, CoRoT, KEPLER space missions and large geographic longitude ground-based networks, a new method is offered by the polar location helping to cope with the problem associated with the Earth's day-night cycle.
Aims: We present the first long time -series photometry from Dome Charlie in the heart of Antarctica and analyze ~4400 photometric measurements of RR Lyrae star S Arae obtained in July and August 2007. Methods: The 40-cm telescope and Photometer AntarctIca eXtinction named PAIX were used for long photometric measurements with high time resolution and a duty cycle of 65%. The Fourier technique was used for the frequency analysis. New high-precision spectroscopic observations of S Arae were also collected using HARPS over one pulsation cycle of S Arae. Results: We confirm the known radial fundamental period of 0.452 day. The high order of its harmonics shows the nonlinear nature of the radial mode. The Blazhko modulation is directly detected in the spectrum and shows a value around 48 d. Together with the Blazhko frequency we also detected triplet structure components up to 15th order showing a nonlinear behavior of the Blazhko modulation. Thus, we conclude that S Arae is a bona fide Blazhko star. The data reveal that there are irregular changes in the S Arae atmosphere during the Blazhko cycle. A residual scatter phenomenon is detected and is more intense where the nonlinear effects are strongest. Therefore, the connection between temporal hydrodynamic phenomena and such modulation has to be taken into account in Blazhko models. Conclusions: High-precision CCD photometry with a very good time resolution can be undertaken at Dome Charlie in Antarctica, and it helps to complete astrophysical measurement time-series. |
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| Programme | 1096 | ||||
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| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher |
EDP Sciences | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0935-4956 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 5717 | |||
| Permanent link to this record | |||||
| Author | Klein K-L, Masson S, Bouratzis C, Grechnev V, Hillaris A, Preka-Papadema P, | ||||
| Title | The relativistic solar particle event of 2005 January 20: origin of delayed particle acceleration | Type | Journal Article | ||
| Year | 2014 | Publication | Astronomy & Astrophysics | Abbreviated Journal | 0004-6361 |
| Volume | 572 | Issue | Pages | A4-A4 | |
| Keywords | |||||
| Abstract | The highest energies of solar energetic nucleons detected in space or through gamma-ray emission in the solar atmosphere are in the GeV range. Where and how the particles are accelerated is still controversial. We search for observational evidence on the acceleration region(s) by comparing the timing of relativistic protons detected at Earth and radiative signatures in the solar atmosphere during the particularly well observed 2005 Jan 20 event. This investigation focusses on the post-impulsive flare phase, where a second peak was observed in the relativistic proton time profile by neutron monitors. This time profile is compared in detail with UV imaging and radio spectrography over a broad frequency band from the low corona to interplanetary space.It is shown that the late relativistic proton release to interplanetary space was accompanied by a distinct new episode of energy release and electron acceleration in the corona traced by the radio emission and by brightenings of UV kernels. These signatures are interpreted in terms of magnetic restructuring in the corona after the CME passage. We attribute the delayed relativistic proton acceleration to magnetic reconnection and possibly turbulence in large- scale coronal loops. While type II radio emission was observed in the high corona, no evidence of a temporal relationship with the relativistic proton acceleration was found. | ||||
| Programme | 227 | ||||
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| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher |
EDP Sciences | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0004-6361 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 5829 | |||
| Permanent link to this record | |||||
| Author | Lilensten Jean, Bommier Véronique, Barthélemy Mathieu, Lamy Hervé, Bernard David, Moen Joran Idar, Johnsen Magnar Gullikstad, Løvhaug Unni Pia, Pitout Frédéric, | ||||
| Title | The auroral red line polarisation: modelling and measurements | Type | Journal Article | ||
| Year | 2015 | Publication | Journal of Space Weather and Space Climate | Abbreviated Journal | |
| Volume | 5 | Issue | Pages | A26-A26 | |
| Keywords | |||||
| Abstract | In this work, we model the polarisation of the auroral red line using the electron impact theory developed by Bommier et al (2011). This theory enables the computation of the distribution of the Degree of Linear Polarisation (DoLP) as function of height if the flux of precipitated electrons is provided as input.\\
An electron transport code is used to infer the stationary electron flux at each altitude in the ionosphere as a function of energy and pitch angle. Using adequate cross sections, the integral of this electron flux over energy and pitch angle provides an anisotropy parameter from which the theoretical local DoLP can be computed at each altitude. The modelled DoLP is then derived by integrating along the line-of-sight.\\ Depending on the integration length, the modelled DoLP ranges between 0.6\% for a very long integration length, and 1.8\% for a very short integration length localized around an altitude of 210 km. A parametric study is performed to check how the characteristics of the local DoLP (maximum value, altitude of the maximum, integrated height profile) vary. It is found that the polarisation is highly sensitive to the scattering function of the electrons, to the electron precipitation and the geomagnetic activity.\\ We compare these values to measured ones obtained during an observational campaign performed in February 2012 from Svalbard. The measured DoLP during the campaign was 1.9\% $\pm$ 0.1\%. The comparison between this value and the theoretical one is discussed . Discrepancies may be due to the poor constraint of the input parameters (thermosphere and ionosphere), to the fact that only electron precipitation is considered in this approach (and not proton precipitation for instance), and to the difficulty in constraining the exact width of the emission layer in the thermosphere. |
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| Programme | 1026 | ||||
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| Corporate Author | Thesis | ||||
| Publisher |
EDP Sciences | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 2115-7251 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 6237 | |||
| Permanent link to this record | |||||
| Author | Wakefield Ewan D, Phillips Richard A, Trathan Philip N, Arata Javier, Gales Rosemary, Huin Nic, Robertson Graham, Waugh Susan M, Weimerskirch Henri, Matthiopoulos Jason, | ||||
| Title | Habitat preference, accessibility, and competition limit the global distribution of breeding Black-browed Albatrosses | Type | Journal Article | ||
| Year | 2011 | Publication | Ecological Monographs | Abbreviated Journal | |
| Volume | 81 | Issue | 1 | Pages | 141 -167 |
| Keywords | |||||
| Abstract | Telemetry methods and remote sensing now make it possible to record the spatial usage of wide-ranging marine animals and the biophysical characteristics of their pelagic habitats. Furthermore, recent statistical advances mean that such data can be used to test ecological hypotheses and estimate species distributions. Black-browed Albatrosses Thalassarche melanophrys are highly mobile marine predators with a circumpolar breeding and foraging distribution in the Southern Hemisphere. Although they remain relatively abundant, increased fisheries bycatch has led to their listing as endangered by conservation bodies. We satellite-tracked 163 breeding Black-browed Albatrosses and eight closely related Campbell Albatrosses T. impavida from nine colonies. We then quantified habitat usage, and modeled population-level spatial distribution at spatiotemporal scales .50 km and 1 month, as a function of habitat accessibility, habitat preference, and intraspecific competition, using mixed-effects generalized additive models (GAMM). During incubation, birds foraged over a wider area than in the post-brood chick-rearing period, when they are more time constrained. Throughout breeding, the order of habitat preference of Black-browed Albatrosses was for neritic (0500 m), shelf-break and upper shelf-slope (5001000 m), and then oceanic (.1000 m) waters. Black-browed Albatrosses also preferred areas with steeper (.38) bathymetric relief and, in addition, during incubation, warmer sea surface temperatures (peak preference ;168C). Although this suggests specialization in neritic habitats, incubation-stage Black- browed Albatrosses from South Georgia also foraged extensively in oceanic waters, preferring areas with high eddy kinetic energy (.250 cm2/s2), especially the Brazil-Malvinas Confluence, a region of intense mesoscale turbulence. During chick-rearing, this species had a more southerly distribution, and following the seasonal retreat of sea ice, birds from some populations utilized neritic polar waters. Campbell Albatrosses showed similar bathymetric preferences but also preferred positive sea level anomalies. Black-browed Albatross foraging areas were partially spatially segregated with respect to colony and region, with birds preferring locations distant from neighboring colonies, presumably in order to reduce competition between parapatric conspecifics. At the global scale, the greatest concentrations of breeding Black-browed Albatrosses are in southern South American neritic, shelf-break, and shelf-slope waters. These regions also hold large fisheries and should therefore be a priority for introduction of bycatch mitigation measures.
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| Programme | 109 | ||||
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| Publisher |
Ecological Society of America | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0012-9615 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | yes | |||
| Call Number | Serial | 475 | |||
| Permanent link to this record | |||||