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Yvon Le Maho, Jason D. Whittington, Nicolas Hanuise, Louise Pereira, Matthieu Boureau, Mathieu Brucker, Nicolas Chatelain, Julien Courtecuisse, Francis Crenner, Benjamin Friess, Edith Grosbellet, Laëtitia Kernaléguen, Frédérique Olivier, Claire Saraux, Nathanaël Vetter, Vincent A. Viblanc, Bernard Thierry, Pascale Tremblay, René Groscolas, Céline Le Bohec |
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Title |
Rovers minimize human disturbance in research on wild animals |
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Journal |
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Year |
2014 |
Publication |
Nature Methods |
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Volume |
11 |
Issue |
12 |
Pages |
1242-1244 |
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Abstract |
Investigating wild animals while minimizing human disturbance remains an important methodological challenge. When approached by a remote-operated vehicle (rover) which can be equipped to make radio-frequency identifications, wild penguins had significantly lower and shorter stress responses (determined by heart rate and behavior) than when approached by humans. Upon immobilization, the rover—unlike humans—did not disorganize colony structure, and stress rapidly ceased. Thus, rovers can reduce human disturbance of wild animals and the resulting scientific bias. |
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137 |
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1548-7105 |
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1548-7105 |
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yes |
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6692 |
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Steven L. Chown, Cassandra M. Brooks, Aleks Terauds, Céline Le Bohec, Céline van Klaveren-Impagliazzo, Jason D. Whittington, Stuart H. M. Butchart, Bernard W. T. Coetzee, Ben Collen, Peter Convey, Kevin J. Gaston, Neil Gilbert, Mike Gill, Robert Höft, Sam Johnston, Mahlon C. Kennicutt Ii, Hannah J. Kriesell, Yvon Le Maho, Heather J. Lynch, Maria Palomares, Roser Puig-Marcó, Peter Stoett, Melodie A. McGeoch |
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Title |
Antarctica and the strategic plan for biodiversity |
Type |
Journal |
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Year |
2017 |
Publication |
PLOS Biology |
Abbreviated Journal |
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Volume |
15 |
Issue |
3 |
Pages |
e2001656 |
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Keywords |
Antarctic Ocean Antarctica Biodiversity Conservation science Invasive species Marine conservation Marine ecology Marine ecosystems |
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Abstract |
The Strategic Plan for Biodiversity, adopted under the auspices of the Convention on Biological Diversity, provides the basis for taking effective action to curb biodiversity loss across the planet by 2020—an urgent imperative. Yet, Antarctica and the Southern Ocean, which encompass 10% of the planet’s surface, are excluded from assessments of progress against the Strategic Plan. The situation is a lost opportunity for biodiversity conservation globally. We provide such an assessment. Our evidence suggests, surprisingly, that for a region so remote and apparently pristine as the Antarctic, the biodiversity outlook is similar to that for the rest of the planet. Promisingly, however, much scope for remedial action exists. |
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137 |
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1545-7885 |
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1545-7885 |
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yes |
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Serial |
6704 |
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Author |
O. I. Berngardt, J. M. Ruohoniemi, J.-P. St‐Maurice, A. Marchaudon, M. J. Kosch, A. S. Yukimatu, N. Nishitani, S. G. Shepherd, M. F. Marcucci, H. Hu, T. Nagatsuma, M. Lester |
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Title |
Global Diagnostics of Ionospheric Absorption During X-Ray Solar Flares Based on 8- to 20-MHz Noise Measured by Over-the-Horizon Radars |
Type |
Journal |
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Year |
2019 |
Publication |
Space Weather |
Abbreviated Journal |
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Volume |
17 |
Issue |
6 |
Pages |
907-924 |
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Keywords |
\special t4ht@.D layer; \special t4ht@.E layer; decameter radars; ionosphere; radionoise absorption; X-ray solar flares |
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Abstract |
An analysis of noise attenuation during 80 solar flares between 2013 and 2017 was carried out at frequencies 8–20 MHz using 34 Super Dual Auroral Radar Network radars and the EKB ISTP SB RAS radar. The attenuation was determined on the basis of noise measurements performed by the radars during the intervals between transmitting periods. The location of the primary contributing ground sources of noise was found by consideration of the propagation paths of radar backscatter from the ground. The elevation angle for the ground echoes was determined through a new empirical model. It was used to determine the paths of the noise and the location of its source. The method was particularly well suited for daytime situations, which had to be limited for the most part to only two crossings through the D region. Knowing the radio path was used to determine an equivalent vertical propagation attenuation factor. The change in the noise during solar flares was correlated with solar radiation lines measured by GOES/XRS, GOES/EUVS, SDO/AIA, SDO/EVE, SOHO/SEM, and PROBA2/LYRA instruments. Radiation in the 1 to 8 Å and near 100 Å are shown to be primarily responsible for the increase in the radionoise absorption, and by inference, for an increase in the D and E region density. The data are also shown to be consistent with a radar frequency dependence having a power law with an exponent of −1.6. This study shows that a new data set can be made available to study D and E regions. |
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Programme |
312 |
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Bachelor's thesis |
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1542-7390 |
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1542-7390 |
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yes |
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7476 |
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J. Gaillardet, I. Braud, F. Hankard, S. Anquetin, O. Bour, N. Dorfliger, J. R. de Dreuzy, S. Galle, C. Galy, S. Gogo, L. Gourcy, F. Habets, F. Laggoun, L. Longuevergne, T. Le Borgne, F. Naaim-Bouvet, G. Nord, V. Simonneaux, D. Six, T. Tallec, C. Valentin, G. Abril, P. Allemand, A. Arènes, B. Arfib, L. Arnaud, N. Arnaud, P. Arnaud, S. Audry, V. Bailly Comte, C. Batiot, A. Battais, H. Bellot, E. Bernard, C. Bertrand, H. Bessière, S. Binet, J. Bodin, X. Bodin, L. Boithias, J. Bouchez, B. Boudevillain, I. Bouzou Moussa, F. Branger, J. J. Braun, P. Brunet, B. Caceres, D. Calmels, B. Cappelaere, H. Celle-Jeanton, F. Chabaux, K. Chalikakis, C. Champollion, Y. Copard, C. Cotel, P. Davy, P. Deline, G. Delrieu, J. Demarty, C. Dessert, M. Dumont, C. Emblanch, J. Ezzahar, M. Estèves, V. Favier, M. Faucheux, N. Filizola, P. Flammarion, P. Floury, O. Fovet, M. Fournier, A. J. Francez, L. Gandois, C. Gascuel, E. Gayer, C. Genthon, M. F. Gérard, D. Gilbert, I. Gouttevin, M. Grippa, G. Gruau, A. Jardani, L. Jeanneau, J. L. Join, H. Jourde, F. Karbou, D. Labat, Y. Lagadeuc, E. Lajeunesse, R. Lastennet, W. Lavado, E. Lawin, T. Lebel, C. Le Bouteiller, C. Legout, Y. Lejeune, E. Le Meur, N. Le Moigne, J. Lions, A. Lucas, J. P. Malet, C. Marais-Sicre, J. C. Maréchal, C. Marlin, P. Martin, J. Martins, J. M. Martinez, N. Massei, A. Mauclerc, N. Mazzilli, J. Molénat, P. Moreira-Turcq, E. Mougin, S. Morin, J. Ndam Ngoupayou, G. Panthou, C. Peugeot, G. Picard, M. C. Pierret, G. Porel, A. Probst, J. L. Probst, A. Rabatel, D. Raclot, L. Ravanel, F. Rejiba, P. René, O. Ribolzi, J. Riotte, A. Rivière, H. Robain, L. Ruiz, J. M. Sanchez-Perez, W. Santini, S. Sauvage, P. Schoeneich, J. L. Seidel, M. Sekhar, O. Sengtaheuanghoung, N. Silvera, M. Steinmann, A. Soruco, G. Tallec, E. Thibert, D. Valdes Lao, C. Vincent, D. Viville, P. Wagnon, R. Zitouna |
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Title |
OZCAR: The French Network of Critical Zone Observatories |
Type |
Journal |
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Year |
2018 |
Publication |
Vadose Zone Journal |
Abbreviated Journal |
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Volume |
17 |
Issue |
1 |
Pages |
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Programme |
1013,1053,1108,1110 |
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Bachelor's thesis |
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ISSN |
1539-1663 |
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1539-1663 |
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yes |
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Serial |
7354 |
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Author |
Sydney Vach, Samuel N. Quinn, Andrew Vanderburg, Stephen R. Kane, Karen A. Collins, Adam L. Kraus, George Zhou, Amber A. Medina, Richard P. Schwarz, Kevin I. Collins, Dennis M. Conti, Chris Stockdale, Bob Massey, Olga Suarez, Tristan Guillot, Djamel Mekarnia, Lyu Abe, Georgina Dransfield, Nicolas Crouzet, Amaury H. M. J. Triaud, François-Xavier Schmider, Abelkrim Agabi, Marco Buttu, Coel Hellier, Elise Furlan, Crystal L. Gnilka, Steve B. Howell, Carl Ziegler, César Briceño, Nicholas Law, Andrew W. Mann, Alexander Rudat, Knicole D. Colon, Mark E. Rose, Michelle Kunimoto, Maximilian N. Günther, David Charbonneau, David R. Ciardi, George R. Ricker, Roland K. Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins |
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Title |
TOI-712: A System of Adolescent Mini-Neptunes Extending to the Habitable Zone |
Type |
Journal |
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Year |
2022 |
Publication |
The Astronomical Journal |
Abbreviated Journal |
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Volume |
164 |
Issue |
2 |
Pages |
71 |
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Keywords |
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Abstract |
As an all-sky survey, NASA’s Transiting Exoplanet Survey Satellite (TESS) mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets that enable study of the evolutionary processes that occur within the first billion years. Here we report the discovery of a young, multiplanet system orbiting the bright K4.5V star, TOI-712 (V = 10.838, , R ⋆ = 0.674 ± 0.016 R ⊙, K). From the TESS light curve, we measure a rotation period of 12.48 days and derive an age between about 500 Myr and 1.1 Gyr. The photometric observations reveal three transiting mini-Neptunes (, , ), with orbital periods of P b = 9.531 days, P c = 51.699 days, and P d = 84.839 days. After modeling the three-planet system, an additional Earth-sized candidate is identified, TOI-712.05 (P = 4.32 days, R P = 0.81 ± 0.11 R ⊕). We calculate that the habitable zone falls between 0.339 and 0.844 au (82.7 and 325.3 days), placing TOI-712 d near its inner edge. Among planetary systems harboring temperate planets, TOI-712 (T = 9.9) stands out as a relatively young star bright enough to motivate further characterization. |
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1066 |
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ISSN |
1538-3881 |
ISBN |
1538-3881 |
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yes |
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Serial |
8598 |
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Author |
Noah Vowell, Joseph E. Rodriguez, Samuel N. Quinn, George Zhou, Andrew Vanderburg, Andrew W. Mann, Matthew J. Hooton, Keivan G. Stassun, Saburo Howard, Allyson Bieryla, David W. Latham, Steve B. Howell, Tristan Guillot, Carl Ziegler, Karen A. Collins, Theron W. Carmichael, Jon M. Jenkins, Avi Shporer, Lyu ABE, Philippe Bendjoya, Jonathan L. Bush, Marco Buttu, Kevin I. Collins, Jason D. Eastman, Matthew J. Fields, Thomas Gasparetto, Maximilian N. Günther, Veselin B. Kostov, Adam L. Kraus, Kathryn V. Lester, Alan M. Levine, Colin Littlefield, Wenceslas Marie-Sainte, Djamel Mékarnia, Hugh P. Osborn, David Rapetti, George R. Ricker, S. Seager, Ramotholo Sefako, Gregor Srdoc, Olga Suarez, Guillermo Torres, Amaury H. M. J. Triaud, R. Vanderspek, Joshua N. Winn |
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Title |
HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star |
Type |
Journal |
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Year |
2023 |
Publication |
The Astronomical Journal |
Abbreviated Journal |
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Volume |
165 |
Issue |
6 |
Pages |
268 |
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Keywords |
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Abstract |
We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large (R b = R J) brown dwarf on a highly eccentric (e = ) orbit with a 39 days period. The host star is a bright (V = 7.3 mag), T eff = 10,400 K star with a mass of M * = M ⊙ and radius of R * = R ⊙, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion's mass of M b = M J as well as the host star's rotation rate ( km s−1). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models. |
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1066 |
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1538-3881 |
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1538-3881 |
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yes |
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Serial |
8683 |
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Author |
A. Henry, E. V. Bezrukova, A. V. Teten’kin, M. I. Kuz’min |
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Title |
New Data on Vegetation and Climate Reconstruction in the Baikal-Patom Highland (Eastern Siberia) in the Last Glacial Maximum and Early Holocene |
Type |
Journal |
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Year |
2018 |
Publication |
Doklady Earth Sciences |
Abbreviated Journal |
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Volume |
478 |
Issue |
2 |
Pages |
241-244 |
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Abstract |
The first results of anthracological investigation for Eastern Siberia on the carbonaceous remains of woody and shrubby plants at the archaeological sites Kovrizhka III and IV in the lower reaches of the Vitim River are presented. The results of anthracological studies enabled us to obtain new data on changes in vegetation and climate along the lower reaches of the Vitim River. As a result, new data on human habitation in the lower reaches of the Vitim River in the last glacial maximum and early Holocene were obtained. |
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Programme |
1140 |
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1531-8354 |
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1531-8354 |
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yes |
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Serial |
7241 |
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Author |
Jean-François Magnaval, Isabelle Leparc-Goffart, Morgane Gibert, Alla Gurieva, Jonathan Outreville, Praskovia Dyachkovskaya, Richard Fabre, Sardana Fedorova, Dariya Nikolaeva, Damien Dubois, Olga Melnitchuk, Pascale Daviaud-Fabre, Marie Marty, Anatoly Alekseev, Eric Crubezy |
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Title |
A Serological Survey About Zoonoses in the Verkhoyansk Area, Northeastern Siberia (Sakha Republic, Russian Federation) |
Type |
Journal |
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Year |
2016 |
Publication |
Vector-Borne and Zoonotic Diseases |
Abbreviated Journal |
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Volume |
16 |
Issue |
2 |
Pages |
103-109 |
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Abstract |
In 2012, a seroprevalence survey concerning 10 zoonoses, which were bacterial (Lyme borreliosis and Q fever), parasitic (alveolar echinococcosis [AE] and cystic echinococcosis [CE], cysticercosis, toxoplasmosis, toxocariasis, and trichinellosis), or arboviral (tick-borne encephalitis and West Nile virus infection), was conducted among 77 adult volunteers inhabiting Suordakh and Tomtor Arctic villages in the Verkhoyansk area (Yakutia). Following serological testing by enzyme-linked immunosorbent assay and/or western blot, no positive result was found for cysticercosis, CE, toxocariasis, trichinellosis, and both arboviral zoonoses. Four subjects (5.2%) had anti-Toxoplasma IgG, without the presence of specific IgM. More importantly, eight subjects (10.4%) tested positive for Lyme borreliosis, two (2.6%) for recently acquired Q fever, and one (1.3%) for AE. Lyme infection and Q fever, whose presence had not been reported so far in Arctic Yakutia, appeared therefore to be a major health threat for people dwelling, sporting, or working in the Arctic area of the Sakha Republic. |
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Programme |
1038 |
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Edition |
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ISSN |
1530-3667 |
ISBN |
1530-3667 |
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yes |
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Call Number |
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Serial |
6914 |
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Author |
Januka Attanayake, Christine Thomas, Vernon F. Cormier, Meghan S. Miller, Keith D. Koper |
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Title |
Irregular Transition Layer Beneath the Earth's Inner Core Boundary From Observations of Antipodal PKIKP and PKIIKP Waves |
Type |
Journal |
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Year |
2018 |
Publication |
Geochemistry, Geophysics, Geosystems |
Abbreviated Journal |
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Volume |
19 |
Issue |
10 |
Pages |
3607-3622 |
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Keywords |
inner core boundary inner core solidification inner core structure PKIIKP PKIKP transition |
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Abstract |
Standard Earth models assume a simple uniform inner core boundary (ICB) separating the liquid iron outer core from the solid iron inner core. Metallurgical and geodynamic experiments, however, predict lateral variations along this boundary originating from thermochemical and geodynamic instabilities during solidification. We search for evidence of this lateral heterogeneity by exploiting the sensitivity of antipodal PKIIKP waveforms to the shear wave velocity structure of the uppermost inner core beneath their reflection points on the underside of the ICB. Measuring PKIIKP/PKIKP energy ratios from 33 rare antipodal seismograms in the 178o to 180o distance range, we find this ratio varying between 0.1 and 1.1. Synthetic seismograms demonstrate that a laterally homogeneous liquid-solid ICB cannot account for this variability. Observations instead support a spatially variable ICB transition consisting of either (1) gradients in seismic velocities and density in which they smoothly increase from those at the outer core to those in the bulk of the inner core over a maximum depth of 10 km or (2) a layered transition with localized double discontinuities in velocities and densities separated by 4–10 km. A layered transition can generate a coda following PKIKP if shear velocity is small (<2 km/s) in the transition. Our results imply that the ICB is not uniform and might appear patchy with lateral rigidity variations. Nonuniform small-scale structural features that we infer to be present at the ICB are consistent with nonlinear solidification mechanisms driven by small-scale outer core convection in the lowermost outer core. |
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Programme |
133 |
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ISSN |
1525-2027 |
ISBN |
1525-2027 |
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yes |
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Call Number |
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7385 |
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Author |
G. A. Cox, W. J. Brown, L. Billingham, R. Holme |
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Title |
MagPySV: A Python Package for Processing and Denoising Geomagnetic Observatory Data |
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Year |
2018 |
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Geochemistry, Geophysics, Geosystems |
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19 |
Issue |
9 |
Pages |
3347-3363 |
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Abstract |
Measurements obtained at ground-based observatories are crucial to understanding the geomagnetic field and its secular variation (SV). However, current data processing methods rely on piecemeal closed-source codes or are performed on an ad hoc basis, hampering efforts to reproduce data sets underlying published results. We present MagPySV, an open-source Python package designed to provide a consistent and automated means of generating high-resolution SV data sets from hourly means distributed by the Edinburgh World Data Centre. It applies corrections for documented baseline changes, and optionally, data may be excluded using the ap index, which removes effects from documented high solar activity periods such as geomagnetic storms. Robust statistics are used to identify and remove outliers. Developing existing denoising methods, we use principal component analysis of the covariance matrix of residuals between observed SV and that predicted by a global field model to remove a proxy for external field contamination from observations. This method creates a single covariance matrix for all observatories of interest combined and applies the denoising to all locations simultaneously, resulting in cleaner time series of the internally generated SV. In our case studies, we present cleaned data in two geographic regions: monthly first differences are used to investigate geomagnetic jerk morphology in Europe, an area previously well-studied at lower resolution, and annual differences are investigated for northern high latitude regions, which are often neglected due to their high noise content. MagPySV may be run on the command line or within an interactive Jupyter notebook; two notebooks reproducing the case studies are supplied. |
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139 |
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ISSN |
1525-2027 |
ISBN |
1525-2027 |
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yes |
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Call Number |
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Serial |
7450 |
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