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Author |
Brucker Ludovic, Dinnat Emmanuel P, Picard Ghislain, Champollion Nicolas, |
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Title |
Effect of Snow Surface Metamorphism on Aquarius L-Band Radiometer Observations at Dome C, Antarctica
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Journal Article |
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Year |
2014 |
Publication |
IEEE Transactions on Geoscience and Remote Sensing |
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Volume |
52 |
Issue |
11 |
Pages |
7408-7417 |
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Keywords |
AD 2011 08, Antarctic Plateau, Antarctica, Aquarius, Aquarius L-band radiometer observations, Dome C, L-band, Microwave radiometry, Ocean temperature, Sea surface, Snow, brightness temperature, cryosphere, horizontal polarization, hydrological techniques, microwave observations, microwave radiometry, radiometer calibration, remote sensing, remote sensing grain index, sea surface salinity retrievals, sensor intercalibration, shallow-penetration TB channels, snow, snow surface metamorphism effect, snow-ice properties, subkelvin accuracy, surface-based near-infrared photographs, vertical polarization, |
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1110 |
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0196-2892 |
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5867 |
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Author |
Libois Quentin, Picard Ghislain, Arnaud Laurent, Morin Samuel, Brun Eric, |
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Title |
Modeling the impact of snow drift on the decameter-scale variability of snow properties on the Antarctic Plateau
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Type |
Journal Article |
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Year |
2014 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
0148-0227 |
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Volume |
119 |
Issue |
20 |
Pages |
11,662-11,681 |
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411,1110 |
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Bachelor's thesis |
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0148-0227 |
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5857 |
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Chapter 12. Conclusions: present and future of Southern Ocean Biogeography |
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Book Chapter |
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2014 |
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1091 |
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5855 |
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Ropert-Coudert Y, Hindell MA, Phillips R, Charrassin JB, Trudelle L, Raymond B |
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Title |
Chapter 8. Biogeographic patterns of birds and mammals |
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Book Chapter |
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2014 |
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364-387 |
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1091 |
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yes |
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5850 |
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Title |
Biogeographic Atlas of the Southern Ocean |
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Book Whole |
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Year |
2014 |
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Publisher: Scientific Committee on Antarctic Research, Cambridge, 480 pp. ISBN: 978-0-948277-28-3 |
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1091 |
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yes |
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5849 |
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Title |
Inter-Annual Variability of Fledgling Sex Ratio in King Penguins.
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Type |
Journal Article |
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Year |
2014 |
Publication |
PloS one |
Abbreviated Journal |
1932-6203 |
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Volume |
9 |
Issue |
12 |
Pages |
e114052-e114052 |
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137 |
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Public Library of Science |
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1932-6203 |
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yes |
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5848 |
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Title |
Rovers minimize human disturbance in research on wild animals.
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Type |
Journal Article |
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Year |
2014 |
Publication |
Nature methods |
Abbreviated Journal |
Nat. Methods |
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Volume |
11 |
Issue |
12 |
Pages |
1242-4 |
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Keywords |
Adaptation, Psychological, Animals, Animals, Wild, Behavior, Animal, Heart Rate, Heart Rate: physiology, Human Activities, Humans, Robotics, Spheniscidae, Spheniscidae: physiology, Stress, Physiological, |
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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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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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1548-7091 |
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yes |
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5846 |
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Author |
Labarrere B., Prinzing A., Winkworth R., Hennion F. |
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Title |
Response capacities of sub-Antarctic endemic species to climate change. 2014 Scientific Committee on Antarctic Research Open Science Conference, Auckland, New Zealand, 25-28th August. |
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Conference - International - Poster |
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2014 |
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The sub-Antarctic islands are facing rapid and intense climate change but their isolation also means that dispersal between islands is unlikely to offer an escape route for their floras. Instead the plants on these islands will need to adapt in order to survive. Autochthonous plant species from the Kerguelen Islands are adapted to harsh ecological conditions that include low temperatures, consistent rainfall, and salt spray. These species, especially when growing close to the extremes of their ecological range, may be particularly sensitive to climate change and indeed already exhibit signs of stress during dry summer periods.
In our previous studies we found that species endemic to the Kerguelen province exhibit strong phenotypic integration (i.e. their traits are strongly correlated). Such integration may limit their ability to respond to climate change. The current study focuses on patterns of trait variability and phenotypic integration across abiotic and biotic gradients. Our aim is to estimate the capacity for plastic and adaptive responses in sub-Antarctic plant species.
We performed in situ measurements and experiments in controlled chambers. We measured plant traits and metabolites in situ in populations occupying habitats that differed in both abiotic (pH, conductivity, water saturation) and biotic (diversity of surrounding community) parameters. Populations growing in different environmental conditions show differences in both levels of trait variability and phenotypic integration. We also examined the interactions between these two components and the environment. Experiments characterized tolerance to different combinations of abiotic conditions (light, temperature) using seedlings grown from seed collected on the Kerguelen Islands and those from plants cultivated in growth chambers. We determined trait variability and phenotypic integration within and between populations grown under different conditions.
The significance of phenotypic integration in determining a species ability to adapt to environmental change is not known yet. This goal requires further analyses to determine the relationship between phenotypic integration and plant performance. Understanding this relationship will help to predict the outcomes of climate change for Kerguelen plant species. Considering that environmental changes are more severe at higher latitudes, these insights could be important for the conservation of autochthonous sub-Antarctic species.
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1116 |
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5844 |
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Author |
Labarrere B., Prinzing A., Winkworth R. & Hennion F. |
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Conference - National - Communication |
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2014 |
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5839 |
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Author |
K.-L. Klein |
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Conference - International - Communication |
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2014 |
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Radiation doses at aircraft altitudes are mainly due to energetic particles from the universe that create secondaries in the Earth's atmosphere. The primary cosmic rays at energies of about 1 to several tens of GeV come permanently from our galaxy, presumably from acceleration regions in supernovae or their remnants. The Sun has a twofold influence: on the one hand its variable magnetic field modulates the penetration of galactic cosmic rays in the heliosphere on time scales ranging from a few days, due to coronal mass ejections, to the solar activity cycle. On the other hand the Sun itself may on occasion accelerate protons and ions to GeV energies and thereby create a supplementary radiation dose at times of high solar activity, when the galactic cosmic ray intensity itself is reduced by the heliospheric magnetic field. This talk will illustrate the French SIEVERT system of aircrew dosimetry, with emphasis on solar energetic particle events. Only very strong and extremely rare solar events appear to make relevant contributions to the radiation doses aboard aircraft. We will illustrate some difficulties with forecasting these events, even on rather short term (some tens of minutes), and relate recent work on the quantitative assessment of extreme solar energetic particle events. |
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5838 |
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