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Title |
Measurement of the 17O-excess (17O) of tropospheric ozone using a nitrite-coated filter
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Type |
Journal Article |
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Year |
2012 |
Publication |
Rapid Communications in Mass Spectrometry |
Abbreviated Journal |
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Volume |
26 |
Issue |
10 |
Pages |
1219-1231 |
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Keywords |
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Abstract |
RATIONALE |
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Programme |
1011 |
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Thesis |
Bachelor's thesis |
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Publisher |
John Wiley & Sons, Ltd |
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Series Volume  |
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Edition |
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ISSN |
1097-0231 |
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Approved |
yes |
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Call Number |
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Serial |
3613 |
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Author |
Sims, G., M. C. B. Ashley, X. Cui, J. R. Everett, L. Feng, X. Gong, S. Hengst, Z. Hu, C. Kulesa, J. S. Lawrence, D. M. Luong-Van, P. Ricaud, Z. Shang, J. W. V. Storey, L. Wang, H. Yang, J. Yang, X. Zhou, Z. Zhu |
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Title |
Precipitable Water Vapor above Dome A, Antarctica, Determined from Diffuse Optical Sky Spectra |
Type |
Journal Article |
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Year |
2012 |
Publication |
Publications of the Astronomical Society of the Pacific |
Abbreviated Journal |
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Volume |
124 |
Issue |
911 |
Pages |
74-83 |
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Abstract |
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Programme |
910 |
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Thesis |
Bachelor's thesis |
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ISSN |
0004-6280 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3632 |
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Title |
Nitrous acid at Concordia (inland site) and Dumont d'Urville (coastal site), East Antarctica
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Type |
Journal Article |
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Year |
2012 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
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Volume |
117 |
Issue |
D8 |
Pages |
D08303- |
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Keywords |
East Antarctica, LOPAP, nitrous acid, 0322 Constituent sources and sinks, 0365 Troposphere: composition and chemistry, 0368 Troposphere: constituent transport and chemistry, |
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Abstract |
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Programme |
414;903 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
2156-2202 |
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Approved |
yes |
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Call Number |
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Serial |
3817 |
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Title |
Vibrations of Mertz Glacier ice tongue, East Antarctica
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Type |
Journal Article |
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Year |
2012 |
Publication |
Journal of Glaciology |
Abbreviated Journal |
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Volume |
58 |
Issue |
210 |
Pages |
665-676 |
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Keywords |
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Abstract |
At the time of its calving in February 2010, Mertz Glacier, East Antarctica, was characterized by a 145 km long, 35 km wide floating tongue. In this paper, we use GPS data from the Collaborative Research into Antarctic Calving and Iceberg Evolution (CRAC-ICE) 2007/08 and 2009/10 field seasons to investigate the dynamics of Mertz Glacier. Two months of data were collected at the end of the 2007/08 field season from two kinematic GPS stations situated on each side of the main rift of the glacier tongue and from rock stations located around the ice tongue during 2008/09. Using Precise Point Positioning with integer ambiguity fixing, we observe that the two GPS stations recorded vibrations of the ice tongue with several dominant periods. We compare these results with a simple elastic model of the ice tongue and find that the natural vibration frequencies are similar to those observed. This information provides a better understanding of their possible effects on rift propagation and hence on the glacier calving processes.
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Programme |
688;1050 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
0022-1430 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3824 |
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Author |
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Title |
Observation of low shear wave velocity at the base of the polar ice sheets: evidence for enhanced anisotropy
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Type |
Journal Article |
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Year |
2012 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
190 |
Issue |
1 |
Pages |
391 -405 |
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Keywords |
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Abstract |
We analyse seismic data from the broad-band stations located on the Antarctic and Greenland ice sheets to determine the large-scale seismic parameters of the polar ice sheets. The P-to-S converted waves at the ice/rock interface and inside the ice sheets and their multiples (the P receiver functions) are used to estimate the in situ P velocity Vp and the P-to-S velocity ratio Vp/Vs of the polar ice. The thickness of the whole ice layer is precisely known either from radio echo soundings or from ice core drillings allowing thus an accurate determination of Vp and Vp/Vs. At some places in and near the Wilkes Basin, a sedimentary layer is probably squeezed between the ice and the bedrock. We find that the polar ice caps have a two-layer structure, the upper layer of variable thickness about 2/3 of the total thickness with velocities very close to the ice standard values and the lower layer preserving a standard Vp but with about 25 per cent smaller shear wave velocity and a more or less constant thickness. The shear-velocity drop in the lower layer may be the evidence of a strong anisotropy induced by preferred orientation of ice crystals and by fine layering of soft and hard ice layers. A large variation of ice viscosity with depth is therefore expected and heterogeneous flowing of the polar ice sheet. This heterogeneous flowing may invalidate the use at great depth of the ice dating models based on monotonic layer thinning.
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Programme |
906 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0956-540X |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3828 |
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Author |
Wookey James |
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Title |
Direct probabilistic inversion of shear wave data for seismic anisotropy
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Type |
Journal Article |
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Year |
2012 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
189 |
Issue |
2 |
Pages |
1025 -1037 |
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Keywords |
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Abstract |
Shear wave splitting is perhaps the most unambiguous signature of the effect of anisotropic materials on the propagation of seismic waves. It has been used extensively to study anisotropy in the Earth, at global scales from the inner core to the tectonics of the uppermost mantle and crust, and at smaller scales for imaging deformation in hydrocarbon reservoirs. Well-established techniques exist for measuring shear wave splitting in a single (three-component) seismogram and more recently these have been extended to treat shear wave splitting in a tomographic fashion: determining non-uniform anisotropic models using large data sets of splitting measurements. Here, I propose an extension to a recent shear wave splitting tomography methodology which incorporates the data analysis into the inversion itself. This methodology uses a non-linear neighbourhood algorithm inversion to explore the parameter space defined by an anisotropic model consisting of a number of uniform domains. Each candidate model is assessed by applying the splitting it predicts to the entire data set. This approach is computationally expensive, but is highly amenable to parallelization. I apply the methodology to three simple synthetic cases to demonstrate the utility of the method. Finally, I apply the approach to the problem of inferring two-layer anisotropy from SKS splitting, which is a commonly attempted problem in global seismology. This uses data from the seismic station EKTN, where two-layer splitting has been previously inferred. This highlights some of the inherent trade-offs with such studies, and emphasizes the need to incorporate extra information to resolve these. This method is applicable to shear wave anisotropy analysis in a broad range of settings from global to reservoir scale.
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Programme |
133 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Edition |
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ISSN |
0956-540X |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3841 |
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Author |
Joliet F. |
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Title |
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Type |
Conference - International - Article with Reading Comitee |
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Year |
2012 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
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Abstract |
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Programme |
1043 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3856 |
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Author |
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Title |
Vultures of the Seas: Hyperacidic Stomachs in Wandering Albatrosses as an Adaptation to Dispersed Food Resources, including Fishery Wastes
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Type |
Journal Article |
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Year |
2012 |
Publication |
PLoS ONE |
Abbreviated Journal |
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Volume |
7 |
Issue |
6 |
Pages |
e37834- |
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Keywords |
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Abstract |
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Programme |
109 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Public Library of Science |
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Edition |
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ISSN |
1932-6203 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3882 |
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Author |
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Title |
Robots in ecology: welcome to the machine
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Type |
Journal Article |
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Year |
2012 |
Publication |
Open journal of ecology |
Abbreviated Journal |
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Volume |
2 |
Issue |
2 |
Pages |
49-57 |
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Keywords |
Animal Behavior;Biodiversity Monitoring;Autonomous Vehicle;Drone;Cyborg;Population Biology;Robot Ethics;Robotics Network, |
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Abstract |
Robots have primarily been developed for warfare, yet they also serve peaceful purposes. Their use in Ecology is in its infancy, but they may soon become essential tools in a broad variety of eco-logical sub-disciplines. Autonomous robots, in particular drones sent to previously inaccessi-ble areas, have revolutionized data acquisition, not only for abiotic parameters, but also for re-cording the behavior of undisturbed animals and collecting biological material. Robots will also play an essential role in population Ecology, as they will allow for automatic census of indi-viduals through image processing, or via detec-tion of animals marked electronically. These new technologies will enable automated experimen-tation for increasingly large sample sizes, both in the laboratory and in the field. Finally, inter-active robots and cyborgs are becoming major players in modern studies of animal behavior. Such rapid progress nonetheless raises ethical, environmental, and security issues.
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Programme |
333 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
2162-1985 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3958 |
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Author |
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Title |
Physiological consequences of exposure to perfluoroalkyl substances, organochlorine compounds and mercury in an Arctic breeding seabird |
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Thesis |
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Year |
2018 |
Publication |
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Abbreviated Journal |
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Pages |
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Keywords |
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Abstract |
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Programme |
330 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6986 |
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