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Title |
Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean |
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Journal |
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Year |
2021 |
Publication  |
Journal of Geophysical Research: Oceans |
Abbreviated Journal |
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Volume |
126 |
Issue |
3 |
Pages |
e2020JC016970 |
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Keywords |
data rescue salt-marsh proxies sea-level changes South Atlantic tide gauges |
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688 |
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ISSN |
2169-9291 |
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yes |
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Call Number |
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Serial |
8603 |
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Author |
R. Sulzbach, H. Dobslaw, M. Thomas |
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Title |
High-Resolution Numerical Modeling of Barotropic Global Ocean Tides for Satellite Gravimetry |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Oceans |
Abbreviated Journal |
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Volume |
126 |
Issue |
5 |
Pages |
e2020JC017097 |
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Keywords |
M2-tide minor tides pole-rotation self-attraction and loading tide-generating potential topographic wavedrag |
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688 |
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2169-9291 |
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yes |
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Call Number |
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Serial |
8605 |
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Author |
Steven Franke, Daniela Jansen, Sebastian Beyer, Niklas Neckel, Tobias Binder, John Paden, Olaf Eisen |
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Title |
Complex Basal Conditions and Their Influence on Ice Flow at the Onset of the Northeast Greenland Ice Stream |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Earth Surface |
Abbreviated Journal |
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Volume |
126 |
Issue |
3 |
Pages |
e2020JF005689 |
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Keywords |
basal roughness bed conditions Greenland Ice Sheet ice stream Northeast Greenland Ice Stream radio-echo sounding |
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Abstract |
Abstract The ice stream geometry and large ice surface velocities at the onset region of the Northeast Greenland Ice Stream (NEGIS) are not yet well reproduced by ice sheet models. The quantification of basal sliding and a parametrization of basal conditions remains a major gap. In this study, we assess the basal conditions of the onset region of the NEGIS in a systematic analysis of airborne ultra-wideband radar data. We evaluate basal roughness and basal return echoes in the context of the current ice stream geometry and ice surface velocity. We observe a change from a smooth to a rougher bed where the ice stream widens, and a distinct roughness anisotropy, indicating a preferred orientation of subglacial structures. In the upstream region, the excess ice mass flux through the shear margins is evacuated by ice flow acceleration and along-flow stretching of the ice. At the downstream part, the generally rougher bed topography correlates with a decrease in flow acceleration and lateral variations in ice surface velocity. Together with basal water routing pathways, this hints to two different zones in this part of the NEGIS: the upstream region collecting water, with a reduced basal traction, and downstream, where the ice stream is slowing down and is widening on a rougher bed, with a distribution of basal water toward the shear margins. Our findings support the hypothesis that the NEGIS is strongly interconnected to the subglacial water system in its onset region, but also to the subglacial substrate and morphology. |
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Programme |
1180 |
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ISSN |
2169-9003 |
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yes |
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Call Number |
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Serial |
7272 |
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Title |
Antarctic Atmospheric River Climatology and Precipitation Impacts |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
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Volume |
126 |
Issue |
8 |
Pages |
e2020JD033788 |
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Keywords |
Antarctica atmospheric rivers climatology meteorology |
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Abstract |
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Programme |
411 |
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ISSN |
2169-8996 |
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yes |
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Call Number |
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Serial |
8327 |
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Author |
A. Barbero, J. Savarino, R. Grilli, C. Blouzon, G. Picard, M. M. Frey, Y. Huang, N. Caillon |
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Title |
New Estimation of the NOx Snow-Source on the Antarctic Plateau |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
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Volume |
126 |
Issue |
20 |
Pages |
e2021JD035062 |
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Keywords |
Antarctic Plateau flux chamber nitrate photolysis snowpack emissions |
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Abstract |
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Programme |
1177 |
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ISSN |
2169-8996 |
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yes |
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Call Number |
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Serial |
8393 |
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Title |
Regional Characteristics of Atmospheric Sulfate Formation in East Antarctica Imprinted on 17O-Excess Signature |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
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Volume |
126 |
Issue |
6 |
Pages |
e2020JD033583 |
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Keywords |
aerosols Antarctica isotope methanesulfonate sulfate |
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Abstract |
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Programme |
1177 |
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ISSN |
2169-8996 |
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yes |
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Call Number |
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Serial |
8412 |
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Author |
Benjamin Pohl, Vincent Favier, Jonathan Wille, Danielle G Udy, Tessa R Vance, Julien Pergaud, Niels Dutrievoz, Juliette Blanchet, Christoph Kittel, Charles Amory, Gerhard Krinner, Francis Codron |
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Title |
Relationship Between Weather Regimes and Atmospheric Rivers in East Antarctica |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
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Volume |
126 |
Issue |
24 |
Pages |
e2021JD035294 |
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Keywords |
atmospheric rivers East Antarctica snowfall amounts temperature anomalies weather regimes |
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Abstract |
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Programme |
411 |
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ISSN |
2169-8996 |
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Approved |
yes |
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Call Number |
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Serial |
8430 |
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Author |
Richard D. Ray, Bryant D. Loomis, Victor Zlotnicki |
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Title |
The mean seasonal cycle in relative sea level from satellite altimetry and gravimetry |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geodesy |
Abbreviated Journal |
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Volume |
95 |
Issue |
7 |
Pages |
80 |
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Keywords |
Annual geocenter motion Annual land motion Annual/semiannual cycle Satellite altimetry |
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Abstract |
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Programme |
688 |
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Edition |
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ISSN |
1432-1394 |
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Approved |
yes |
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Call Number |
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Serial |
8610 |
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Title |
The biology and feeding ecology of Arctic charr in the Kerguelen Islands |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Fish Biology |
Abbreviated Journal |
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Volume |
98 |
Issue |
2 |
Pages |
526-536 |
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Programme |
1041 |
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ISSN |
1095-8649 |
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yes |
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Call Number |
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Serial |
8178 |
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Author |
G. Hubert, S. Aubry |
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Title |
Simulation of atmospheric cosmic-rays and their impacts based on pre-calculated databases, physical models and computational methods |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Computational Science |
Abbreviated Journal |
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Volume |
51 |
Issue |
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Pages |
101307 |
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Keywords |
Ambient dose equivalent Atmospheric cosmic-rays Cosmogenic nuclide production Multi-physics Single event effect |
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Abstract |
The atmospheric cosmic-ray environment is composed of secondary particles produced when primary cosmic rays interact with the nucleus of atmospheric atoms. Modeling of atmospheric radiations is essential for investigating their impacts on human activities such as radiation risks in aviation or scientific fields such as cosmogenic dating. The nuclear transport codes are a common and accurate way to model the cosmic ray interaction in the atmosphere with minimal approximations. However, tracking all produced secondary particles in each event in the whole depth of the atmosphere and sampling many events to obtain the statistically meaningful results would be a computational challenge and disadvantageous from the point of view of time consumption. This paper presents a computational platform names ATMOS CORE based on pre-calculated databases coupled to physical models and computational methods. The fields of application concern the atmospheric cosmic-rays characterization as well as their effects on electronics systems, on the ambient dose for aircrews or the cosmogenic nuclide production for dating activities. Some comparisons between simulations and measurements are also presented and discussed. |
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Programme |
1112 |
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ISSN |
1877-7503 |
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yes |
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Call Number |
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Serial |
7957 |
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