| Records |
Author  |
J. Lilensten, M. Barthélemy, G. Besson, H. Lamy, M.G. Johnsen, J. Moen |
| Title |
The thermospheric auroral red line Angle of Linear Polarisation |
Type |
Journal Article |
| Year |
2016 |
Publication |
Journal of geophysical research-space physics |
Abbreviated Journal |
J. Geophys. Res. |
| Volume |
121 |
Issue |
7 |
Pages |
2016JA022941 |
| Keywords |
|
| Abstract |
The auroral red line at 630 nm is linearly polarized. Up to now, only its Degree of LinearPolarization had been studied. In this article, we examine for the first time the Angle of Linear Polarization(AoLP) and we compare the measurements to the apparent angle of the magnetic field at the location ofthe red line emission. We show that the AoLP is a tracer of the magnetic field configuration. This opens newperspectives, both in the frame of space weather and in the field of planetology. |
| Programme |
1026 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0148-0227 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6541 |
| Permanent link to this record |
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| Author |
J.C. Aymes, M. Vignon, E. Beall, F. Guéraud, P. Gaudin |
| Title |
Age validation of the Kerguelen Islands brown trout, Salmo trutta L.,and selection of the otolith optimal zone for investigating chronological data series |
Type |
Journal Article |
| Year |
2016 |
Publication |
Fisheries research |
Abbreviated Journal |
|
| Volume |
|
Issue |
176 |
Pages |
|
| Keywords |
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| Abstract |
The selection of an otolith optimal zone where to obtain interpretable chronological data (e.g. chemicaltransect, increment width) and valid age estimation is fundamental if otoliths are to be used as an effectivetool for investigating life history traits or environments experienced by fish. In the remote sub-AntarcticKerguelen Islands (49◦S, 70◦E), introduced brown trout populations are invading the archipelago sincethe 50’s and life histories information is of great interest to understand the invasion dynamics. Unfortu-nately, few studies have used otolith as a tool to estimate brown trout age at these extreme latitudes andlittle is known about otolith growth and annulus formation in these sub-polar conditions. Furthermore,no formal procedure exists at the population level to select an otolith optimal zone where to concomi-tantly extract chronological data aiming at investigating life history traits and growth chronologies. Inthis context, the aims of this study were (1) to validate the otolith age estimation method by the deter-mination of the position of the first annulus and the annual formation of subsequent annuli; (2) to definean optimal zone where chronological data could be coupled to age estimates. A brown trout populationlocated near the Port-au-Franc¸ ais station was studied and sampled repeatedly using mark-recapturemethod and Alizarin Red S marking. After to 2 years of recaptures 53 sagittae were analysed. A compositeindex was created to select an optimal zone where chronological data transects have the maximum prob-abilities to cross readable annuli. Results showed that brown trout forms annuli at the end of September,starting with the first winter after the December hatching. Annulus formation up to 2 years after mark-ing was validated. The area between 80◦and 120◦perpendicular to the rostrum/core axis was optimalfor the positioning of data transect. The proposed formal approach allows distinguishing the zone thatidentifies the best compromise between spatial resolution and precise annulus positioning along otolithchronological series.AcknowledgementsWe thank the French Polar Institute (IPEV, Institut PolairePaul-Emile Victor) for the financial support of the Program 1041SALMEVOL; we thank Jacques Labonne for his management of theprogram from 2008 to 2013.We thank Margaret Lang for providingwriting assistance that lead to the clarity of the English language.We thank Jacques Rives and Franc¸ ois Guéraud for otolith and scaleanalysis. We thank two anonymous reviewers for comments thatlead to substantial improvements in the manuscript. We gratefullyacknowledge the logistical support provided by the TAAF adminis-tration and the Southern French Natural Reserve at Kerguelen. Thefieldwork would not have been possible without the help and sup-port of the IPEV logistics team (Romuald Bellec, Yann Lemeur, NinaMarchand) and all the people involved in the SALMEVOL summercampaign (Stephane Betoulle, Eduardo Vicente Dopico-Rodriguez,Emily Farcy, Franc¸ ois Guéraud, José-Luis Horreo-Escandon, RenaudKaeuffer, Jacques Rives, Thibault Thellier, Julien Tremblay). |
| Programme |
1041 |
| Campaign |
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| Address |
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| Corporate Author |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0165-7836 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6533 |
| Permanent link to this record |
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| Author |
Kernaléguen Laëtitia, Cherel Yves, Guinet Christophe, Arnould John PY |
| Title |
Mating success and body condition not related to foraging specializations in male fur seals |
Type |
Journal Article |
| Year |
2016 |
Publication |
Royal society open science |
Abbreviated Journal |
|
| Volume |
3 |
Issue |
7 |
Pages |
160143 |
| Keywords |
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| Abstract |
Individual specialization is widespread among wild populations. While its fitness consequences are central in predicting the ecological and evolutionary trajectories of populations, they remain poorly understood. Long-term individual foraging specializations occur in male Antarctic (Arctocephalus gazella) and Australian (A. pusillus doriferus) fur seals. Strong selective pressure is expected in these highly dimorphic and polygynous species, raising the question of the fitness payoffs associated with different foraging strategies. We investigated the relationship between individual isotopic niche (a proxy of foraging specialization), body size and condition, and an index of reproductive success (harem size) in territorial males. Individuals varied greatly in their skin and fur isotopic values reflecting a range of foraging strategies within the two populations. However, in both species, isotopic niche was not correlated to body size, condition or mating success (R2/ρ < 0.06). Furthermore, no foraging niche was predominant in either species, which would have indicated a substantial long-term fitness benefit of a particular strategy via a higher survival rate. These results suggest that the fitness consequences of a foraging strategy depend not only on the quality of prey and feeding habitat but also on an individual's hunting efficiency and skills. |
| Programme |
109 |
| Campaign |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2054-5703 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6540 |
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| Author |
Ledevin R., Chevret P., Ganem G., Britton-Davidian J., Hardouin E.A., Chapuis J.-L., Pisanu B., da Luz Mathias M., Schlager S., Auffray J.-C., Renaud S. |
| Title |
Phylogeny and adaptation shape the teeth of insular mice |
Type |
Journal Article |
| Year |
2016 |
Publication |
Proceedings of the royal society b-biological sciences |
Abbreviated Journal |
|
| Volume |
283 |
Issue |
1824 |
Pages |
20152820 |
| Keywords |
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| Abstract |
By accompanying human travels since prehistorical times, the house mouse dispersed widely throughout the world, and colonized many islands. The origin of the travellers determined the phylogenetic source of the insular mice, which encountered diverse ecological and environmental conditions on the various islands. Insular mice are thus an exceptional model to disentangle the relative role of phylogeny, ecology and climate in evolution. Molar shape is known to vary according to phylogeny and to respond to adaptation. Using for the first time a three-dimensional geometric morphometric approach, compared with a classical two-dimensional quantification, the relative effects of size variation, phylogeny, climate and ecology were investigated on molar shape diversity across a variety of islands. Phylogeny emerged as the factor of prime importance in shaping the molar. Changes in competition level, mostly driven by the presence or absence of the wood mouse on the different islands, appeared as the second most important effect. Climate and size differences accounted for slight shape variation. This evidences a balanced role of random differentiation related to history of colonization, and of adaptation possibly related to resource exploitation. |
| Programme |
136 |
| Campaign |
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| Address |
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Thesis |
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Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0962-8452 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6564 |
| Permanent link to this record |
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| Author |
Legrand, M., Preunkert, S., Savarino, J., Frey, M. M., Kukui, A., Helmig, D., Jourdain, B., Jones, A., Weller, R., Brough, N., and Gallée, H |
| Title |
Inter-annual variability of surface ozone at coastal (Dumont d’Urville, 2004-014) and inland (Concordia, 2007-2014) sites in East Antarctica |
Type |
Journal Article |
| Year |
2016 |
Publication |
Atmospheric chemistry and physics |
Abbreviated Journal |
|
| Volume |
16 |
Issue |
12 |
Pages |
8053-8069 |
| Keywords |
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| Abstract |
Surface ozone has been measured since 2004 at the coastal East Antarctic site of Dumont d'Urville (DDU), and since 2007 at the Concordia station located on the high East Antarctic plateau. This paper discusses long-term changes, seasonal and diurnal cycles, as well as inter-annual summer variability observed at these two East Antarctic sites. At Concordia, near-surface ozone data were complemented by balloon soundings and compared to similar measurements done at the South Pole. The DDU record is compared to those obtained at the coastal site of Syowa, also located in East Antarctica, as well as the coastal sites of Neumayer and Halley, both located on the coast of the Weddell Sea in West Antarctica. Surface ozone mixing ratios exhibit very similar seasonal cycles at Concordia and the South Pole. However, in summer the diurnal cycle of ozone is different at the two sites with a drop of ozone in the afternoon at Concordia but not at the South Pole. The vertical distribution of ozone above the snow surface also differs. When present, the ozone-rich layer located near the ground is better mixed and deeper at Concordia (up to 400 m) than at the South Pole during sunlight hours. These differences are related to different solar radiation and wind regimes encountered at these two inland sites. DDU appears to be the coastal site where the impact of the late winter/spring bromine chemistry is the weakest, but where the impact of elevated ozone levels caused by NOx snow emissions from the high Antarctic plateau is the highest. The highest impact of the bromine chemistry is seen at Halley and Neumayer, and to a lesser extent at Syowa. These three sites are only weakly impacted by the NOx chemistry and the net ozone production occurring on the high Antarctic plateau. The differences in late winter/spring are attributed to the abundance of sea ice offshore from the sites, whereas those in summer are related to the topography of East Antarctica that promotes the katabatic flow bringing oxidant-rich inland air masses to the site. There appears to be a decreasing change in summer surface ozone at the two East Antarctic sites of Concordia and DDU over the most recent period (2004–2014 and 2007–2014). Further research, including continued monitoring, is needed at these two sites to better separate the effect of synoptic transport from possible change of NOx snow emissions in response to recovery of the stratospheric ozone layer leading to penetration of more UV radiation to the surface. |
| Programme |
414 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1680-7316 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6542 |
| Permanent link to this record |
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| Author |
Legrand, M., X. Yang, S. Preunkert, and N. Theys |
| Title |
Year-round records of sea salt, gaseous, and particulate inorganic bromine in the atmospheric boundary layer at coastal (Dumont d'Urville) and central (Concordia) East Antarctic sites |
Type |
Journal Article |
| Year |
2016 |
Publication |
Journal of geophysical research-atmospheres |
Abbreviated Journal |
J. Geophys. Res. |
| Volume |
121 |
Issue |
2 |
Pages |
|
| Keywords |
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| Abstract |
Multiple year-round records of bulk and size-segregated compositions of aerosol were obtained at the coastal Dumont d'Urville (DDU) and inland Concordia sites located in East Antarctica. They document the sea-salt aerosol load and composition including, for the first time in Antarctica, the bromide depletion of sea-salt aerosol relative to sodium with respect to seawater. In parallel, measurements of bromide trapped in mist chambers and denuder tubes were done to investigate the concentrations of gaseous inorganic bromine species. These data are compared to simulations done with an off-line chemistry transport model, coupled with a full tropospheric bromine chemistry scheme and a process-based sea-salt production module that includes both sea-ice-sourced and open-ocean-sourced aerosol emissions. Observed and simulated sea-salt concentrations sometime differ by up to a factor of 2 to 3, particularly at DDU possibly due to local wind pattern. In spite of these discrepancies, both at coastal and inland Antarctica, the dominance of sea-ice-related processes with respect to open ocean emissions for the sea-salt aerosol load in winter is confirmed. For summer, observations and simulations point out sea salt as the main source of gaseous inorganic bromine species. Investigations of bromide in snow pit samples do not support the importance of snowpack bromine emissions over the Antarctic Plateau. To evaluate the overall importance of the bromine chemistry over East Antarctica, BrO simulations were also discussed with respect data derived from GOME-2 satellite observations over Antarctica. |
| Programme |
1154 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0148-0227 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6546 |
| Permanent link to this record |
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| |
| Author |
Legrand, M., X. Yang, S. Preunkert, and N. Theys |
| Title |
Year-round records of sea salt, gaseous, and particulate inorganic bromine in the atmospheric boundary layer at coastal (Dumont d’Urville) and central (Concordia) East Antarctic sites |
Type |
Journal Article |
| Year |
2016 |
Publication |
Journal of geophysical research-atmospheres |
Abbreviated Journal |
J. Geophys. Res. |
| Volume |
121 |
Issue |
2 |
Pages |
997-1023 |
| Keywords |
|
| Abstract |
Multiple year-round records of bulk and size-segregated compositions of aerosol were obtained at the coastal Dumont d'Urville (DDU) and inland Concordia sites located in East Antarctica. They document the sea-salt aerosol load and composition including, for the first time in Antarctica, the bromide depletion of sea-salt aerosol relative to sodium with respect to seawater. In parallel, measurements of bromide trapped in mist chambers and denuder tubes were done to investigate the concentrations of gaseous inorganic bromine species. These data are compared to simulations done with an off-line chemistry transport model, coupled with a full tropospheric bromine chemistry scheme and a process-based sea-salt production module that includes both sea-ice-sourced and open-ocean-sourced aerosol emissions. Observed and simulated sea-salt concentrations sometime differ by up to a factor of 2 to 3, particularly at DDU possibly due to local wind pattern. In spite of these discrepancies, both at coastal and inland Antarctica, the dominance of sea-ice-related processes with respect to open ocean emissions for the sea-salt aerosol load in winter is confirmed. For summer, observations and simulations point out sea salt as the main source of gaseous inorganic bromine species. Investigations of bromide in snow pit samples do not support the importance of snowpack bromine emissions over the Antarctic Plateau. To evaluate the overall importance of the bromine chemistry over East Antarctica, BrO simulations were also discussed with respect data derived from GOME-2 satellite observations over Antarctica. |
| Programme |
414 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0148-0227 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6543 |
| Permanent link to this record |
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| Author |
Lucie Bazin, Amaelle Landais, Emilie Capron, Valérie Masson-Delmotte, Catherine Ritz, Ghislain Picard, Jean Jouzel, Marie Dumont, Markus Leuenberger, and Frédéric Prié |
| Title |
Phase relationships between orbital forcing and the composition of air trapped in Antarctic ice cores |
Type |
Journal Article |
| Year |
2016 |
Publication |
Climate of the past |
Abbreviated Journal |
|
| Volume |
12 |
Issue |
3 |
Pages |
729-748 |
| Keywords |
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| Abstract |
Abstract. Orbital tuning is central for ice core chronologies beyond annual layer counting, available back to 60 ka (i.e. thousands of years before 1950) for Greenland ice cores. While several complementary orbital tuning tools have recently been developed using δ18Oatm, δO2⁄N2 and air content with different orbital targets, quantifying their uncertainties remains a challenge. Indeed, the exact processes linking variations of these parameters, measured in the air trapped in ice, to their orbital targets are not yet fully understood. Here, we provide new series of δO2∕N2 and δ18Oatm data encompassing Marine Isotopic Stage (MIS) 5 (between 100 and 160 ka) and the oldest part (340–800 ka) of the East Antarctic EPICA Dome C (EDC) ice core. For the first time, the measurements over MIS 5 allow an inter-comparison of δO2∕N2 and δ18Oatm records from three East Antarctic ice core sites (EDC, Vostok and Dome F). This comparison highlights some site-specific δO2∕N2 variations. Such an observation, the evidence of a 100 ka periodicity in the δO2∕N2 signal and the difficulty to identify extrema and mid-slopes in δO2∕N2 increase the uncertainty associated with the use of δO2∕N2 as an orbital tuning tool, now calculated to be 3–4 ka. When combining records of δ18Oatm and δO2∕N2 from Vostok and EDC, we find a loss of orbital signature for these two parameters during periods of minimum eccentricity (∼ 400 ka, ∼ 720–800 ka). Our data set reveals a time-varying offset between δO2∕N2 and δ18Oatm records over the last 800 ka that we interpret as variations in the lagged response of δ18Oatm to precession. The largest offsets are identified during Terminations II, MIS 8 and MIS 16, corresponding to periods of destabilization of the Northern polar ice sheets. We therefore suggest that the occurrence of Heinrich–like events influences the response of δ18Oatm to precession. |
| Programme |
902 |
| Campaign |
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| Address |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1814-9324 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6525 |
| Permanent link to this record |
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| Author |
Laparie M., Vernon P., Cozic Y., Frenot Y., Renault D., Debat V. |
| Title |
Wing morphology of the active flyer Calliphora vicina (Diptera, Calliphoridae) during its invasion of a sub-antarctic archipelago where insect flightlessness is the rule |
Type |
Journal Article |
| Year |
2016 |
Publication |
Biological journal of the linnean society |
Abbreviated Journal |
|
| Volume |
119 |
Issue |
|
Pages |
179-193 |
| Keywords |
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| Abstract |
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| Programme |
136 |
| Campaign |
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Place of Publication |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0024-4066 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6565 |
| Permanent link to this record |
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| Author |
Marianne Gabirot, Jérôme Mardon, Sylvie Campagna, Nigel West, Francesco Bonadonna, and Sandra M. Saunders |
| Title |
Guidelines for collecting and extracting avian odors in remote field: Case study of a subantarctic seabird |
Type |
Book Chapter |
| Year |
2016 |
Publication |
|
Abbreviated Journal |
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| Volume |
|
Issue |
|
Pages |
435-460 |
| Keywords |
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| Abstract |
in Chemical Signals in Vertebrates 13. Recent research on avian chemical signalling has highlighted the need for new appropriate protocols especially for sampling, and analyzing, compounds borne by individuals Although many studies have already examined the chemical substances secreted by birds, only few works have done so from the perspective of chemical communication and none have focused on the actual airborne compounds which make up the final odor. As well as the relative infancy of the field, this gap originates from the absence of an appropriate methodological framework. In this study, we provide a methodological guideline of various combinations of sampling and extraction techniques that have been developed and tested in our research. These include: analysis of (i) uropygial secretion samples by solvent extraction, (ii) feather lipids by solvent extraction, (iii) feather lipids by direct solid-phase thermal desorption, (iv) cotton swab (rubbed on bird) by solid phase microextraction, (v) cotton swab by direct solid-phase thermal desorption and (vi) airborne volatiles by thermal desorption. To achieve this, we used the particular case study of blue petrels (Halobaena caerulea), a Sub-antarctic procellariiform seabird, living on remote islands and known for its good olfactory capabilities. Outcomes from the different methods are presented in terms of chromatographic quality, the number and properties of the analytes resolved and their suitability for the work in isolated locations. Advantages and limitations of each method are discussed together with challenges that remain to make the new protocols presented more robust for field chemo-ecologists. |
| Programme |
354 |
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ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6535 |
| Permanent link to this record |
