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Author |
Hubert Guillaume, Cheminet Adrien, |
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Title |
Radiation Effects Investigations Based on Atmospheric Radiation Model (ATMORAD) Considering GEANT4 Simulations of Extensive Air Showers and Solar Modulation Potential.
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Journal Article |
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Year |
2015 |
Publication |
Radiation research |
Abbreviated Journal |
Radiat. Res. |
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Volume |
184 |
Issue |
1 |
Pages |
83-94 |
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Keywords |
Atmosphere, Computer Simulation, Cosmic Radiation, Models, Theoretical, Neutrons, Solar Activity, |
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Abstract |
The natural radiative atmospheric environment is composed of secondary cosmic rays produced when primary cosmic rays hit the atmosphere. Understanding atmospheric radiations and their dynamics is essential for evaluating single event effects, so that radiation risks in aviation and the space environment (space weather) can be assessed. In this article, we present an atmospheric radiation model, named ATMORAD (Atmospheric Radiation), which is based on GEANT4 simulations of extensive air showers according to primary spectra that depend only on the solar modulation potential (force-field approximation). Based on neutron spectrometry, solar modulation potential can be deduced using neutron spectrometer measurements and ATMORAD. Some comparisons between our methodology and standard approaches or measurements are also discussed. This work demonstrates the potential for using simulations of extensive air showers and neutron spectroscopy to monitor solar activity.
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1112 |
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The Radiation Research Society |
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0033-7587 |
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yes |
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6201 |
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Author |
Cayer Donald, Bhiry Najat, |
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Journal Article |
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Year |
2014 |
Publication |
Arctic, Antarctic, and Alpine Research |
Abbreviated Journal |
Arct. Antarct. Alp. Res. |
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Volume |
46 |
Issue |
1 |
Pages |
55-65 |
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1080 |
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Institute of Arctic and Alpine Research (INSTAAR), University of Colorado |
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1523-0430 |
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yes |
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5544 |
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Journal Article |
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Year |
2014 |
Publication |
Arctic, Antarctic, and Alpine Research |
Abbreviated Journal |
Arct. Antarct. Alp. Res. |
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Volume |
46 |
Issue |
1 |
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40-54 |
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1080 |
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Institute of Arctic and Alpine Research (INSTAAR), University of Colorado |
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1523-0430 |
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5549 |
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Author |
Colin Southwell, Louise Emmerson, Akinori Takahashi, Akiko Kato, Christophe Barbraud, Karine Delord, Henri Weimerskirch |
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Title |
Recent studies overestimate colonization and extinction events for Adelie Penguin breeding colonies |
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Journal |
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Year |
2017 |
Publication |
The Auk |
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134 |
Issue |
1 |
Pages |
39-50 |
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Abstract |
Modeling metapopulation dynamics is potentially a useful and powerful tool for ecologists and conservation biologists. However, the key processes driving metapopulation dynamics are colonization and extinction events, which are notoriously difficult to study. A recent global assessment of Adelie Penguin (Pygoscelis adeliae) breeding populations reported multiple potential colonization and extinction events from occupancy observations using recent high-resolution satellite imagery and examination of historical occupancy literature, but emphasized that the events should be confirmed with direct observations. We evaluated these conclusions by developing a comprehensive database of direct observations of Adelie Penguin breeding site occupancy across East Antarctica. The database allowed 16 of 19 proposed colonization and extinction events in this region to be evaluated using direct observations that were concurrent in space and time (same breeding season) with observations from satellite imagery. We concluded that none of the 16 proposed colonization and extinction events had occurred. One true extinction event may have been correctly identified from satellite imagery, but a conclusive evaluation was not possible because the direct and satellite observations were not concurrent in time. The evaluation identified several sources of error in observations from satellite imagery, including errors of omission through failure to detect small colonies and errors of commission through misidentification of other biological and physical features as Adelie Penguin guano. The occupancy database corrected issues of poor precision and accuracy in locations of historical occupancy data. Our results improve understanding of key parameters for Adelie Penguin metapopulation dynamics and facilitate improved interpretation of satellite imagery in the future. |
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109 |
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0004-8038 |
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0004-8038 |
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yes |
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6650 |
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Author |
Colin Southwell, Louise Emmerson, Akinori Takahashi, Akiko Kato, Christophe Barbraud, Karine Delord, Henri Weimerskirch |
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Journal |
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Year |
2017 |
Publication |
The Auk: Ornithological Advances |
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Volume |
134 |
Issue |
1 |
Pages |
39-50 |
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Abstract |
Abstract. Modeling metapopulation dynamics is potentially a useful and powerful tool for ecologists and conservation biologists. However, the key processes dri |
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109 |
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0004-8038 |
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0004-8038 |
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yes |
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Serial |
7180 |
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Author |
Picard, G et al. |
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Title |
Spectral albedo and derive specific surface area of snow at Dome C, 2012-2015 |
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Report |
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Year |
2016 |
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1110 |
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yes |
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6431 |
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Author |
Delord K., Barbraud C., Bost C.A., Cherel Y., Guinet C. & Weimerskirch H. |
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Title |
Atlas of top predators from French Southern Territories in the Southern Indian Ocean. CEBC-CNRS. |
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Book Whole |
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2013 |
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252 |
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394 |
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yes |
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4810 |
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Author |
Isabelle Badenhausser, Lise Chambrin, Marc Lebouvier |
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Book |
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2020 |
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Pages |
151 p |
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136 |
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978-2-7380-1440-5 |
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yes |
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7975 |
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Author |
Hullé M., Buchard C., Georges R., Vernon P. |
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2018 |
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136 |
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7479 |
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Title |
Environmental drivers of under-ice phytoplankton bloom dynamics in the Arctic Ocean |
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2020 |
Publication |
Elementa: Science of the Anthropocene |
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8 |
Issue |
30 |
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1164 |
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2325-1026 |
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8115 |
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