| Records |
| Author |
Grémillet; D. |
| Title |
Arctic seabirds versus climate change: a scientific Epos across the North Atlantic |
Type |
Conference - International - Communication |
| Year |
2016 |
Publication |
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| Abstract |
Invited speaker. International Conference of Ecological Sciences. Marseille, Octobre 2016. |
| Programme |
388 |
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Approved |
yes |
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Serial |
6399 |
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| Author |
Van Vliet-Lanoë, B., Schneider, J.-L., Guðmundsson, A., Guillou, H., Bergerat F., Cavailhes T., Chazot G., Liorziou C.A., Guégan, S. |
| Title |
The Rangá Formation in southern Iceland: a continuous Eemian estuarine record forced by glacio-isostasy. Réunion des Sciences de la Terre, Caen, Novembre 2016 (résumé soumis) |
Type |
Conference - National - Communication |
| Year |
2016 |
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316 |
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Approved |
yes |
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Serial |
6398 |
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| Author |
Hejda, Pavel; Chambodut, Aude; Curto, Juan-Jose; Flower, Simon; Kozlovskaya, Elena; Kubašta, Petr; Matzka, Jürgen; Tanskanen, Eija; Thomson, Alan |
| Title |
Incorporation of geomagnetic data and services into EPOS infrastructure |
Type |
Conference - International - Communication |
| Year |
2016 |
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Abbreviated Journal |
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Issue |
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Pages |
6933 |
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| Abstract |
EGU General Assembly 2016, held 17-22 April, 2016 in Vienna AustriaMonitoring of the geomagnetic field has a long history across Europe that dates back to 1830', and is currently experiencing an increased interest within Earth observation and space weather monitoring. Our goals within EPOS-IP are to consolidate the community, modernise data archival and distribution formats for existing services and create new services for magnetotelluric data and geomagnetic models. Specific objectives are: • Enhance existing services providing geomagnetic data (INTERMAGNET- INTErnational Real-time MAGnetic observatory NETwork; World Data Centre for Geomagnetism; IMAGE- International Monitor for Auroral Geomagnetic Effects) and existing services providing geomagnetic indices (ISGI – International Service of Geomagnetic Indices). • Develop and enhance the geomagnetic community's metadata systems by creating a metadata database, filling it and putting in place processes to ensure that it is kept up to date in the future. • Develop and build access to magnetotelluric (MT) data including transfer functions and time series data from temporary, portable MT-arrays in Europe, as well as to lithospheric conductivity models derived from TM-data. • Develop common web and database access points to global and regional geomagnetic field and conductivity models. • Establish links from the geomagnetic data services, products and models to the Integrated Core Services. The immediate task in the current period is to identify data models of existing services, modify them and integrate into a common model of Geomagnetic Thematic Core Services. |
| Programme |
139 |
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yes |
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6397 |
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| Author |
Hejda P., Chambodut A., Curto J-J., Flower S., Kozlovskaya E., Kubasta P., Matzka J., Tanskanen E., Thomson A. |
| Title |
The role of geomagnetic community in the development of EPOS Geomagnetism Thematic Core Services |
Type |
Conference - International - Communication |
| Year |
2016 |
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IAGA Workshop on on Geomagnetic Observatory Instruments, Data acquisition and Processing, Dourbes, Belgium, September 2016European Plate Observing System (EPOS) is aimed at integrating geoscience data across scientific disciplines. EPOS Implementation Phase was supported by a four-year Horizon2020 grant that started on 1 October 2015. The goals of Geomagnetism Thematic Core Services are: • Enhance existing services providing geomagnetic data (INTERMAGNET, WDC for Geomagnetism, IMAGE) and existing services providing geomagnetic indices (ISGI). • Develop and enhance the geomagnetic community's metadata systems by creating a metadata database, filling it and putting in place processes to ensure that it is kept up to date in the future. • Develop and build access to magnetotelluric (MT) data including transfer functions and time series data from temporary, portable MT-arrays in Europe, as well as to lithospheric conductivity models derived from TM-data. • Develop common web and database access points to global and regional geomagnetic field and conductivity models. An important task of the project is to establish communication channels for the interaction with the geomagnetic community and use them for testing and validation of the services and for measuring their impact. |
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139 |
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yes |
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Serial |
6396 |
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| Author |
Eve Udino |
| Title |
Effets de la contrainte énergétique sur le succès reproducteur dans un contexte environnemental changeant :une étude à long-terme chez le manchot Adélie(Pygoscelis adeliae) |
Type |
Master |
| Year |
2016 |
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Abbreviated Journal |
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| Abstract |
Selon la théorie des traits d’histoire de vie, les espèces longévives tendent à maximiser leur succès reproducteur sans compromettre leur survie. Chez le manchot Adélie, de fortes contraintes environnementales conditionnent le succès reproducteur. Le niveau des réserves énergétiques ainsi que leur gestion apparaissent comme des facteurs clés dans la résistance au jeûne prolongé associé à la reproduction. En cas d’atteinte d’une masse critique inférieure, des changements métaboliques, hormonaux et comportementaux surviennent, aboutissant à l’abandon du nid. Dans cette étude, nous avons discriminé les trois statuts reproducteurs possibles du manchot Adélie : succès, échec et abandon. Dans un contexte environnemental changeant, nous cherchons à déterminer si le niveau des réserves énergétiques d’un individu affecte (1) son succès reproducteur, (2) le choix de son partenaire et (3) la taille ainsi que la masse de sa couvée. Pour ce faire, nous avons analysé des données issues des campagnes d’été effectuées à Dumont d’Urville de 2005-2006 à 2015-2016. En 2011, 2012 et 2014 le succès reproducteur à l’émancipation est faible, se situant entre 5% et 30% tandis qu’il varie entre 57% et 93% les autres années. En 2013, il est catastrophique (0%). Conformément à nos attentes, la masse corporelle initiale (MCi) conditionne le statut reproducteur, s’élevant en moyenne à 5,4 kg, 5,2 kg et 4,9 kg chez les individus en succès, échec et abandon, respectivement. Cependant, pour un même statut reproducteur, la MCi moyenne est similaire entre les années, indiquant un faible effet des conditions environnementales. Contrairement à nos attentes, les individus en échec et en abandon ne dépensent pas plus d’énergie que les individus en succès, leur perte de masse spécifique oscillant entre 50 et 55g. En revanche, la masse corporelle lors du départ en mer est 5% plus faible chez les individus en échec et 10% plus faible chez ceux en abandon comparés aux individus en succès. Enfin, la masse et la taille de la couvée sont d’autant plus importantes que la MCi du couple est élevée. Notre étude supporte l’idée que la contrainte énergétique une année donnée affecte plus sensiblement le succès reproducteur que la contrainte environnementale interannuelle. |
| Programme |
1091 |
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Thesis |
Bachelor's thesis |
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Approved |
yes |
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6395 |
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| Author |
Larnier, H., Chambodut, A., Sailhac, P. |
| Title |
Using magnetic observatories as reference stations in magnetotelluric data processing of geomagnetic pulsations |
Type |
Conference - International - Communication |
| Year |
2016 |
Publication |
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Abbreviated Journal |
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IAGA Workshop on on Geomagnetic Observatory Instruments, Data acquisition and Processing, Dourbes, Belgium, September 2016Magnetotellurics (MT) is a passive geophysical exploration technique which uses time series of natural magnetic and electric fields measured at the ground surface. It is based on the induction of electric currents in the ground by large scale geomagnetic waves. A wide collection of waves is used in MT, from lightning strikes emitted waves to magnetic pulsations induced by the interaction of the sun and the magnetosphere. In this work, we have developed a methodology based on the continuous wavelet transform to process MT data in the period range [1-500] seconds based on the time-frequency characteristics of geomagnetic pulsations. In this period range, geomagnetic pulsations are the preponderant signals. To properly detect geomagnetic pulsations in MT time series, we are generating Fourier surrogates of quiet magnetic time series. Then, by comparison between the distribution of wavelets coefficients of these surrogates and the original signal, we are recovering significant wavelet coefficients associated to geomagnetic pulsations. The magnetic observatories are of primary importance in this framework as their data are used as large-scale reference station for the occurrence of geomagnetic events. We are showing several datasets and their consecutive analysis with regards to improvement brought by magnetic observatories data onto the characterization of MT transfer functions. |
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139 |
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yes |
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6394 |
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| Author |
Rogister Y., Hothem L. |
| Title |
Absolute Gravity Measurements: Objectives, Results and Perpectives, POLENET Science Meeting, Columbus, Ohio |
Type |
Conference - International - Communication |
| Year |
2016 |
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337 |
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yes |
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6393 |
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Rogister Y., Hothem L., Bernard J.-D., Amos M., O'BrienJ., Gentle P. |
| Title |
Gravity survey at McMurdo Station, Scott Base, Cape Roberts, and Mario Zucchelli Station, Antarctica, 19 November-11 December 2015 |
Type |
Report |
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2016 |
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This report and the reports of the 2009 and 2011 similar Antarctic gravity campaigns are available from http://eost.unistra.fr/observatoires/observatoires-geophysiques-globaux/obsgravi/recherches-associees/rebond-post-glaciaire/ |
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337 |
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yes |
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6392 |
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L. Romanova, V. Balter, S. Duchesne, P. Gérard, N. Pokatilova, M. Deveaux, E. Crubézy, B. Ludes |
| Title |
La diffusion du thé et du tabac dans l'Arctique Sibérien : la tombe gelée d'Omouk 1 (Yakoutie, Sibérie Orientale). |
Type |
Conference - National - Communication |
| Year |
2016 |
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1038 |
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yes |
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6391 |
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| Author |
D. Nikolaeva, P. Gerard |
| Title |
La population de l'Indigirka (fouilles archéologique 2013-2015). |
Type |
Conference - National - Communication |
| Year |
2016 |
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1038 |
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yes |
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6390 |
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