| Records |
| Author |
É Vignon, M.-L. Roussel, I. V. Gorodetskaya, C. Genthon, A. Berne |
| Title |
Present and Future of Rainfall in Antarctica |
Type |
Journal |
| Year |
2021 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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| Volume |
48 |
Issue |
8 |
Pages |
e2020GL092281 |
Keywords  |
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| Abstract |
While most precipitation in Antarctica falls as snow, little is known about liquid precipitation, although it can have ecological and climatic impacts. This study combines meteorological reports at 10 stations with the ERA5 reanalysis to provide a climatological characterization of rainfall occurrence over Antarctica. Along the East Antarctic coast, liquid precipitation occurs 22 days per year at most and coincides with maritime intrusions and blocking anticyclones. Over the north-western Antarctic Peninsula, rainfall occurs more than 50 days per year on average and the recent summer cooling was accompanied by a decrease of −35 annual rainy days per decade between 1998 and 2015 at Faraday-Vernadsky. Projections from seven latest-generation climate models reveal that Antarctic coasts will experience a warming and more frequent and intense rainfall by the end of the century. Rainfall is expected to impact new regions of the continent, increasing their vulnerability to melting by the preconditioning of surface snow. |
| Programme |
1013,1143 |
| Campaign |
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| Address |
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Thesis |
Bachelor's thesis |
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| ISSN |
1944-8007 |
ISBN |
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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 |
7935 |
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| Author |
Van Hanja J |
| Title |
Caractérisation des habitats marins benthiques en zones côtières aux Iles Kerguelen par analyse d'images sous-marines |
Type |
Master 1 |
| Year |
2021 |
Publication |
Master 1 Océanographie, Université de Liège |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
10 pp |
| Keywords |
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| Abstract |
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| Programme |
1044 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8062 |
| Permanent link to this record |
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| Author |
Meudec L. |
| Title |
Analyse de la diversité des astéries du Plateau des Kerguelen par approches génétique et morphologique et modélisation des habitats |
Type |
Master 2 |
| Year |
2021 |
Publication |
Master 2 Sciences de la Mer, Sorbonne Universités |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
50 pp |
| Keywords |
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| Abstract |
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| Programme |
1044 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8063 |
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| Author |
Morgan Godard |
| Title |
Caractérisation du comportement alimentaire de l'éléphant de mer Mirounga leonina et liens avec les structures physiques sub-mésoéchelles (1-10km) dans l'océan Austral : une approche par analyse de données fonctionnelles |
Type |
Thesis |
| Year |
2021 |
Publication |
Thèse de doctorat en Océanographie |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
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| Abstract |
De nombreuses questions restent en suspens quant aux relations existantes entre les processus biologiques et physiques dans l'océan Austral. Pour répondre à ces questions, des enregistreurs électroniques sont déployés sur des prédateurs marins, et notamment sur des éléphants de mer austraux. Ces enregistreurs échantillonnent une grande variété de données physiques, biologies ou comportementales à haute fréquence générant ainsi une quantité considérable d’information. L’ensemble de ces données sont dites fonctionnelles car elles présentent un caractère commun : elles évoluent selon un continuum, qu’il soit spatial ou temporel. L’objectif de cette thèse est donc double, il s’agit d’étudier l’activité alimentaire de femelles éléphant de mer en relation avec les processus physiques de l’océan austral, tout en intégrant le caractère fonctionnel des données échantillonnées. Les résultats obtenus montrent que (1) par rapport aux méthodes classiquement employées, les méthodes d’analyse de données fonctionnelles permettent d’identifier une plus grande variété de comportements de plongées au sens biologique défini. (2) Ces approches fonctionnelles sont plus adaptées pour des données aux fréquences d’échantillonnage variable. (3) L’analyse de données fonctionnelles nous permet également d’accéder à la densité de nos individus, reflet de leur condition corporelle, et les comportements de plongées qu’ils adoptent ont une influence réelle sur cette condition corporelle, à différentes échelles de temps. (4) Il existe une relation entre les caractéristiques des masses d’eau rencontrées par les femelles éléphants de mer et les plongées qu’elles effectuent. |
| Programme |
1201 |
| Campaign |
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| Address |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7727 |
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| Author |
Karl-Ludwig Klein |
| Title |
Radio Astronomical Tools for the Study of Solar Energetic Particles II.Time-Extended Acceleration at Subrelativistic and Relativistic Energies |
Type |
Journal |
| Year |
2021 |
Publication |
Frontiers in Astronomy and Space Sciences |
Abbreviated Journal |
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| Volume |
7 |
Issue |
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Pages |
93 |
| Keywords |
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| Abstract |
Solar energetic particle (SEP) events are commonly separated in two categories: numerous “impulsive” events of relatively short duration, and a few “gradual” events, where SEP-intensities may stay enhanced over several days at energies up to several tens of MeV. In some gradual events the SEP spectrum extends to relativistic energies (>1 GeV), over shorter durations. The two categories are strongly related to an idea developed in the 1960s based on radio observations: Type III bursts, which were addressed in a companion chapter, outline impulsive acceleration of electrons to subrelativistic energies, while the large and the relativistic SEP events were ascribed to a second acceleration process. At radio wavelengths, typical counterparts were bursts emitted by electrons accelerated at coronal shock waves (type II bursts) and by electron populations in large-scale closed coronal structures (type IV bursts). Both burst types are related to coronal mass ejections (CMEs). Type II bursts from metric to kilometric wavelengths tend to accompany large SEP events, which is widely considered as a confirmation that CME-driven shocks accelerate the SEPs. But type II bursts, especially those related to SEP events, are most often accompanied by type IV bursts, where the electrons are rather accelerated in the wake of the CME. Individual event studies suggest that although the CME shock is the most plausible accelerator of SEPs up to some yet unknown limiting energy, the relativistic SEP events show time structure that rather points to coronal acceleration related to type IV bursts. This chapter addresses the question what type II bursts tell us about coronal shock waves and how type II and type IV radio bursts are related with relativistic proton signatures as seen by particle detectors on the Earth and by their gamma-ray emission in the solar atmosphere, focusing on two relativistic SEP events, on 2005 Jan 20 and 2017 Sep 10. The importance of radio emissions as a complement to the upcoming SEP observations from close to the Sun is underlined. |
| Programme |
227 |
| Campaign |
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Series Issue |
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Edition |
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| ISSN |
2296-987X |
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 |
7777 |
| Permanent link to this record |
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| Author |
Karine Delord, Cédric Cotté, Pascal Terray, Charles-André Bost, Henri Weimerskirch, Christophe Barbraud |
| Title |
Factors affecting adult body condition in the endangered northern rockhopper penguin |
Type |
Journal |
| Year |
2021 |
Publication |
Marine Biology |
Abbreviated Journal |
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| Volume |
168 |
Issue |
3 |
Pages |
27 |
| Keywords |
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| Abstract |
Understanding the factors that drive the dynamics of populations of long‐lived species presents a unique challenge for conservation management. Here, we investigated long-term change in the body condition of adult northern rockhopper penguins Eudyptes moseleyi at Amsterdam Island, southern Indian Ocean, which hosts 5–10% of the global population of this endangered species. Analysis of a long‐term dataset (1994–2016), concurrent to the population's rapid decline, revealed no trend in adult northern rockhopper penguin body condition over time at the stages considered in this study, i.e. breeding and moulting. However, body condition varied between years and sexes and part of this variation was explained by environmental factors. Males were on average in better condition than females whatever the stage and individuals on average were in better condition during the moulting compared to the breeding period. The environmental conditions [sea surface temperature anomaly (SSTa), Subtropical Indian Ocean Dipole (SIOD) and Southern Annular Mode (SAM)] appeared to impact non-linearly the body condition. Overall, females were in better condition for negative values of SAM, SIOD and SSTa. The body condition of males exhibited similar but less complex and more significant patterns, with decreasing body condition for increasing SAM, SIOD and SSTa. The absence of long-term trends in male and female body condition suggests that the very low reproductive output and declining population since 1997 is probably not the result of environmental conditions during pre-breeding and pre-moult and necessitates further research into possible drivers during the breeding season. |
| Programme |
109,394 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
Bachelor's thesis |
| 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 Issue |
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Edition |
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| ISSN |
1432-1793 |
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 |
7792 |
| Permanent link to this record |
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| Author |
Christophe Barbraud, Baudouin des Monstiers, Adrien Chaigne, Cédric Marteau, Henri Weimerskirch, Karine Delord |
| Title |
Predation by feral cats threatens great albatrosses |
Type |
Journal |
| Year |
2021 |
Publication |
Biological Invasions |
Abbreviated Journal |
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| Volume |
23 |
Issue |
8 |
Pages |
2389-2405 |
| Keywords |
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| Abstract |
Feral cats (Felis catus) are a potential threat for several seabird species including medium sized albatrosses, but studies documenting predation behavior, demographic impacts and effects of predator control are scarce. Here, we present data on feral cat predation behavior on one of the world’s largest seabirds, the wandering albatross (Diomedea exulans) at Kerguelen Island, and show how it affects breeding success and rate of population growth. We assess the effect of a feral cat control experiment on breeding success and population viability. Using 32 camera traps we monitored 25 nests of albatross and detected 295 events showing a potential predator. Of these, 75.2% and 24.8% involved feral cats and giant petrels, respectively. Giant petrels were never implicated in direct predation. We recorded 17 attacks of feral cats on 13 albatross chicks. Attacks lasted in average 52.1 ± 72.9 min, and resulted in the death of 10 of the 13 (76.9%) monitored chicks. Breeding success where attacks were recorded was low (12%) compared to areas with no attack (86%). Mean breeding success during 3 years before cat control was 26% and increased to 80% during the 3 years following the experiment. According to predation scenarios, population modelling showed that the albatross population would decline by 2.7–4.5% per year without cat control. Following cat control the population would increase at 1.8% per year. Our results demonstrate that feral cats predate and have negative impacts on breeding success and population growth rate of wandering albatrosses at Kerguelen Island. We provide recommendations on feral cat control and eradication to mitigate the risk of population decline or local extinction of large albatrosses. |
| Programme |
109 |
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Edition |
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| ISSN |
1573-1464 |
ISBN |
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Medium |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7938 |
| Permanent link to this record |
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| Author |
Crouzet N. |
| Title |
Monitoring warm transiting exoplanets for Ariel with ASTEP+ |
Type |
Communication |
| Year |
2021 |
Publication |
Journée Ariel France, 28 janvier 2021 |
Abbreviated Journal |
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Issue |
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Pages |
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| Abstract |
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| Programme |
1066 |
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Approved |
yes |
| Call Number |
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Serial |
7826 |
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| Author |
Guillot T. |
| Title |
Science of temperate exoplanets: The lessons from Juno |
Type |
Book Chapter |
| Year |
2021 |
Publication |
Journée Ariel France, 28 janvier 2021 |
Abbreviated Journal |
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Issue |
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Pages |
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| Programme |
1066 |
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Thesis |
Bachelor's thesis |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7827 |
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| Author |
Akers P., Savarino, J., Caillon, N. |
| Title |
Reconstructing Antarctic snow accumulation using nitrogen isotopes of nitrate |
Type |
Communication |
| Year |
2021 |
Publication |
EGU General Assembly, 19-30 April 2021 |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Abstract |
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| Programme |
1177 |
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Approved |
yes |
| Call Number |
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Serial |
7866 |
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