| Records |
| Author |
Richard D. Ray, Bryant D. Loomis, Victor Zlotnicki |
| Title |
The mean seasonal cycle in relative sea level from satellite altimetry and gravimetry |
Type  |
Journal |
| Year |
2021 |
Publication |
Journal of Geodesy |
Abbreviated Journal |
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| Volume |
95 |
Issue |
7 |
Pages |
80 |
| Keywords |
Annual geocenter motion Annual land motion Annual/semiannual cycle Satellite altimetry |
| Abstract |
Satellite altimetry and gravimetry are used to determine the mean seasonal cycle in relative sea level, a quantity relevant to coastal flooding and related applications. The main harmonics (annual, semiannual, terannual) are estimated from 25 years of gridded altimetry, while several conventional altimeter “corrections” (gravitational tide, pole tide, and inverted barometer) are restored. To transform from absolute to relative sea levels, a model of vertical land motion is developed from a high-resolution seasonal mass inversion estimated from satellite gravimetry. An adjustment for annual geocenter motion accounts for use of a center-of-mass reference frame in satellite orbit determination. A set of 544 test tide gauges, from which seasonal harmonics have been estimated from hourly measurements, is used to assess how accurately each adjustment to the altimeter data helps converge the results to true relative sea levels. At these gauges, the median annual and semiannual amplitudes are 7.1 cm and 2.2 cm, respectively. The root-mean-square differences with altimetry are 3.24 and 1.17 cm, respectively, which are reduced to 1.93 and 0.86 cm after restoration of corrections and adjustment for land motion. Example outliers highlight some limitations of present-day coastal altimetry owing to inadequate spatial resolution: upwelling and currents off Oregon and wave setup at Minamitori Island. |
| Programme |
688 |
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Edition |
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| ISSN |
1432-1394 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8610 |
| Permanent link to this record |
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| Author |
Gómez Coutouly, Yan Axel |
| Title |
Un peuplement antérieur à 20 000 ans en Amérique ? Le caractère anthropique des sites de Pedra Furada (Brésil) en question |
Type |
Journal |
| Year |
2021 |
Publication |
Bulletin de la société préhistorique française |
Abbreviated Journal |
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| Volume |
118 |
Issue |
2 |
Pages |
245-275 |
| Keywords |
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| Abstract |
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| Programme |
1217 |
| Campaign |
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Approved |
yes |
| Call Number |
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Serial |
8690 |
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| Author |
Michaël Beaulieu, Michael Dähne, Jane Köpp, Coline Marciau, Akiko Kato, Yan Ropert-Coudert, Thierry Raclot |
| Title |
Exploring the interplay between nest vocalizations and foraging behaviour in breeding birds |
Type |
Journal |
| Year |
2021 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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| Volume |
180 |
Issue |
|
Pages |
375-391 |
| Keywords |
bird communication foraging behaviour reproductive partner vocalization |
| Abstract |
In many bird species, reproductive partners sing together each time they meet on the nest. Because these nest ceremonies typically correspond to the return of one partner from foraging and to the subsequent departure of the other partner, we hypothesized that the foraging decisions of departing birds may be facilitated by the vocalizations accompanying their partner's return on the nest, providing these vocalizations reflect foraging conditions. We examined this hypothesis in pairs of Adélie penguins, Pygoscelis adeliae, by longitudinally monitoring their nest vocalizations and their spatial distribution when foraging at sea across the guard stage, when both parents regularly alternate foraging at sea and chick attendance at the nest. We found that the acoustic characteristics of the vocalizations produced during nest relief ceremonies reflected some characteristics of the foraging trips of both the returning and departing partners. However, these acoustic characteristics differed between partners and were differently related to their foraging behaviour. Accordingly, departing individuals did not adopt the same foraging behaviour as that of returning individuals. Nest vocalizations therefore do not appear to represent cues facilitating the foraging decisions of departing birds, but they may rather reflect the arousal of partners, which differently correlates with the foraging behaviour of the returning and departing individuals. Our study highlights an interplay between the vocalizations produced on the nest by reproductive partners and their foraging behaviour, thereby broadening the scope of animal vocalizations and opening a novel perspective on the regulation of foraging strategies. However, our exploratory study also highlights the complexity of examining this interplay, as the effects of nest vocalizations on foraging decisions may be complicated by other factors (e.g. intrinsic foraging capacity). This calls for the use of additional and experimental approaches (e.g. vocalization playbacks) to clarify the role of nest vocalizations as potential mediators of foraging decisions. |
| Programme |
1091 |
| Campaign |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0003-3472 |
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 |
8760 |
| Permanent link to this record |
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| Author |
N. Aubone, M. Saraceno, M. L. Torres Alberto, J. Campagna, L. Le Ster, B. Picard, M. Hindell, C. Campagna, C. R. Guinet |
| Title |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
Type |
Journal |
| Year |
2021 |
Publication |
Journal of Marine Systems |
Abbreviated Journal |
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| Volume |
223 |
Issue |
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Pages |
103612 |
| Keywords |
Elephant seals Malvinas current Patagonian shelf slope Southwestern Atlantic Ocean |
| Abstract |
The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern elephant seal, Mirounga leonina. We report here on changes in the foraging behavior of a female seal explained by the combined effect of a cold and high salinity water mass and a decrease in surface chlorophyll-a concentration. Behavioral and oceanographic data from about 5000 profiles of temperature, conductivity, pressure, light and prey encounters were collected within an area ranging 59.5–61°W and 46–47.5°S, at depths of 300–700 m, on the Patagonian slope, during November–December 2018. A decrease in temperature (0.15 °C) and an increase in salinity (0.03) was found below the mixed layer, during December. Light data revealed a significant increase of irradiance in December (almost reaching the ocean bottom) associated with a decrease of chlorophyll-a in the upper levels. Concomitantly, the seal had a different diving behavior in December, foraging near the surface at night and close to the bottom during daylight hours. Also, the seal doubled the prey capture attempts in December compared to November. This study reveals the importance of ocean physical properties on seal's diving and foraging behavior, and how this changes, although small, can impact on seals diet and body composition during their post-breeding trips. |
| Programme |
1201 |
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Edition |
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| ISSN |
0924-7963 |
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 |
8771 |
| Permanent link to this record |
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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 |
| Campaign |
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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 |
8062 |
| Permanent link to this record |
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| Author |
Le Moan E |
| Title |
Utilisation de modèles mixtes pour décrire la réponse de l’oursin spatangue Abatus cordatus (Verrill, 1876), espèce endémique des Kerguelen, aux changements environnementaux |
Type |
Master 1 |
| Year |
2021 |
Publication |
Master 1 Sciences de la Mer, Sorbonne Universités |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
15 pp |
| Keywords |
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| Abstract |
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| Programme |
1044 |
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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 |
8069 |
| Permanent link to this record |
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| Author |
Grégoire Mureau |
| Title |
Étude des impacts des événements extrêmes sur le massif dunaire de la plage de Sanvík (Islande) |
Type |
Master 1 |
| Year |
2021 |
Publication |
Université de bretagne occidentale |
Abbreviated Journal |
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| Volume |
https://www-iuem.univ-brest.fr/pops/attachments/26 |
Issue |
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Pages |
62 p. |
| Keywords |
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| Abstract |
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| Programme |
1216 |
| Campaign |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8383 |
| Permanent link to this record |
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| Author |
Lucien Goulet |
| Title |
Télédétection radar en bande X appliquée à la neige sur la péninsule de Brøgger (Svalbard) |
Type |
Master 1 |
| Year |
2021 |
Publication |
Université grenoble alpes, master sciences de la terre et de l'environnement |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
23 |
| Keywords |
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| Abstract |
Dans un contexte de changement climatique, il est important de déterminer avec précision l’évolution actuelle et future des processus environnementaux pouvant avoir un impact sur les populations. Ainsi, connaitre l’évolution saisonnière du couvert neigeux s’avère crucial car c’est une composante du cycle de l’eau, jouant un rôle de stockage au printemps. La télédétection spatiale joue un rôle important pour le suivi de l’évolution du manteau neigeux aux échelles continentale et régionale. Des études ont déjà mis en avant certains avantages du radar en bande X (notamment son signal de phase). L’analyse du lien entre la réponse de plusieurs paramètres polarimétriques (K0, K3, K4, K7, CCOH et le CPD) et des données météorologiques (dont l’épaisseur du manteau), a permis de conforter l’utilité de la bande X pour la cible neige. On note un intérêt pour l’intensité totale (K0) qui s’avère être intéressante pour l’étude de la hauteur totale de neige. La différence de phase (CPD), ne s’avère pas concluante pour retracer l’épaisseur totale du manteau neigeux dans notre cas d’application. En revanche, elle offre un bon diagnostic des chutes de neige fraiche et pour la cartographie du métamorphisme de la neige. |
| Programme |
1126 |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8756 |
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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 |
| Permanent link to this record |
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| Author |
Hippolyte LEURIDAN (based in LSCE, internship will be supervised both by LSCE - Michel RAMONET -, and IGE - Olivier MAGAND-, laboratories) |
| Title |
Investigation of Radon measurements as a tracer of atmospheric mercury sources using Amsterdam Island records (Indian Ocean) |
Type |
Master 2 |
| Year |
2021 |
Publication |
Internship from soac master (air quality thema) |
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 |
Since The Signature Of The Minamata Convention On Mercury In 2017, National Regulation Coordinated At An International Level Will Come Into Force In Order To Limit Anthropogenic Emissions And Therefore Protect The Human Health And Ecosystem From This Highly Toxic Pollutant. One Need To Evaluate The Efficiency Of National Measures, And Long-term Monitoring Of Atmospheric Mercury (Hg) Is An Important Tool To Address The Changes Over Time Of Emission Sources, Transport, And Deposition Patterns.the Global Mercury Observation System (Gmos) Project Was Funded By The European Commission (Http://www.gmos.eu) And Started In November 2010 With The Overall Goal To Develop A Coordinated Global Observing System To Monitor Hg On A Global Scale, Including A Large Network Of Ground-based Monitoring Stations. To Date, More Than 40 Ground-based Monitoring Sites Constitute The Global Network Covering Many Regions Where Little To No Observational Data Were Available Before Gmos (Sprovieri Et Al., 2016). All Gmos Work Is Now Continued In The Framework Of The International Frame Work Of Gos4m (Global Observation System For Mercury – Http://www.gos4m.org)although Essential To Fully Understand The Cycling Of Mercury At The Global Scale, Mercury Species Records In The Southern Hemisphere Were Really Scarce Before Gmos. In This Context, An Atmospheric Mercury Monitoring Station Has Been Set Up On Amsterdam Island (37◦48 S, 77◦34 E) In The Remote Southern Indian Ocean In 2012. Since 2012, We Continuously Measured Gaseous Mercury Species With A 15 Min Frequency. Angot Et Al. (2014) Discussed The First Two Years Of This Record, Using Principally Wind Sector Analysis And Air Mass Back Trajectories. They Also Include In Their Analysis The Unique Continuous Record Of Radon 222 And 220 (Thoron) (Polian Et Al., 1986; Kritz Et Al., 1990). Radon 222 And 220 (Thoron) Activities Can Be Used To Distinguish Local Soil Outgassing From Remote Continental Source. Combined With Meteorological Data, The Change Of Activities Are Then Powerful Tool To Classify Air Mass Origin For The Atmospheric Gaseous Mercury Record. Rapid And Sharp Variations Of Radon 222 Activity, Referred To As &Ldquo;radonic Storms” (Lambert Et Al., 1970) And Ascribed To Strong Continental Air Mass Advection, Are Then Observed At Amsterdam Island. The Occurrence Of Radonic Storms Was Estimated To Be About 4 % In 2012 And 7 % In 2013. Considering The Works Realized In 2014, The Goal Of This Internship Is To Deeper Explore The Relationships Between The Collected Gaseous Elemental Mercury And Observed Radon (222rn / 220rn) Activities In The Entire Data Set. In Particular, We Will Study The Specific And Coupled Trend Of These Compounds, The Frequency And Intensity Of Radonic Storm Occurrence And Their Potential Link With The Gaseous Elemental Mercury Cycle. Local Meteorology Data As Well As Backtrajectories Simulation (Hysplit And/or Flexpart Model) Will Be Also Used. |
| Programme |
1028 |
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Approved |
yes |
| Call Number |
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Serial |
8055 |
| Permanent link to this record |
