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Title |
An objective rationale for the choice of regularisation parameter with application to global multiple-frequency S-wave tomography
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Type |
Journal Article |
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Year |
2013 |
Publication |
Solid Earth |
Abbreviated Journal |
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Volume |
4 |
Issue |
2 |
Pages |
357-371 |
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Programme |
133, 906 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1869-9529 |
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Approved |
yes |
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Call Number |
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Serial |
4359 |
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Author |
Picard G, Brucker L, Roy A, Dupont F, Fily M, Royer A, |
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Title |
Simulation of the microwave emission of multi-layered snowpacks using the dense media radiative transfer theory: the DMRT-ML model
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Type |
Journal Article |
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Year |
2012 |
Publication |
Geoscientific Model Development Discussions |
Abbreviated Journal |
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Volume |
5 |
Issue |
4 |
Pages |
3647-3694 |
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Keywords |
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Abstract |
DMRT-ML is a physically-based numerical model designed to compute the thermal microwave emission of a given snowpack. Its main application is the simulation of brightness temperatures at frequencies in the range 1-200 GHz similar to those acquired routinely by space-based microwave radiometers. The model is based on the Dense Media Radiative Transfer (DMRT) theory for the computation of the snow scattering and extinction coefficients and on the Discrete Ordinate Method (DISORT) to numerically solve the radiative transfer equation. The snowpack is modeled as a stack of multiple horizontal snow layers and an optional underlying interface representing the soil or the bottom ice. The model handles both dry and wet snow conditions. Such a general design allows the user to account for a wide range of snow conditions. Hitherto, the model has been used to simulate the thermal emission of the deep firn on ice sheets, shallow snowpacks overlying soil in Arctic and Alpine regions, and overlying ice on the large ice-sheet margins and glaciers. DMRT-ML has thus been validated in three very different conditions: Antarctica, Barnes Ice Cap (Canada) and Canadian tundra. It has been recently used in conjunction with inverse methods to retrieve snow grain size from remote sensing data. The model is written in Fortran90 and available to the snow remote sensing community as an open-source software. |
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Programme |
1073 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1991-962X |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
3968 |
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Author |
Passalacqua, O., Gagliardini, O., Parrenin, F., Todd, J., Gillet-Chaulet, F., and Ritz, C |
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Title |
Performance and applicability of a 2.5-D ice-flow model in the vicinity of a dome |
Type |
Journal Article |
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Year |
2016 |
Publication |
Geosci. model dev. |
Abbreviated Journal |
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Volume |
9 |
Issue |
7 |
Pages |
2301-2313 |
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Abstract |
In ice-flow modelling, computing in 3-D requires a lot of resources, but 2-D models lack physical likelihood when the flow is diverging. That is why 2-D models accounting for the divergence, so-called 2.5-D models, are an interesting trade-off. However, the applicability of these 2.5-D models has never been systematically examined. We show that these models are ineffective in the case of highly diverging flows, but also for varying temperature, which was not suspected. |
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Programme |
902 |
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Thesis |
Bachelor's thesis |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1991-9603 |
ISBN |
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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 |
6527 |
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Author |
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Title |
The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities |
Type |
Journal |
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Year |
2015 |
Publication |
Geoscientific Model Development |
Abbreviated Journal |
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Volume |
8 |
Issue |
10 |
Pages |
2991-3005 |
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Keywords |
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Abstract |
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Programme |
1015,1244 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1991-959X |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8162 |
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Author |
Landais A, Dreyfus G, Capron E, Pol K, Loutre M F, Raynaud D, Lipenkov V Y, Arnaud L, Masson-Delmotte V, Paillard D, Jouzel J, Leuenberger M, |
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Title |
Towards orbital dating of the EPICA Dome C ice core using dO2/N2 |
Type |
Journal Article |
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Year |
2011 |
Publication |
Clim. Past Discuss. |
Abbreviated Journal |
1814-9324 |
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Volume |
7 |
Issue |
3 |
Pages |
2217-2259 |
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Keywords |
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Abstract |
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Programme |
902;1013 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Copernicus Publications |
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Original Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1814-9359 |
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 |
3589 |
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Author |
Bruhwiler L M P, Michalak A M, Tans P P |
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Title |
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Type |
Journal Article |
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Year |
2011 |
Publication |
Biogeosciences |
Abbreviated Journal |
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Volume |
8 |
Issue |
5 |
Pages |
1309-1331 |
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Abstract |
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Programme |
416 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Copernicus Publications |
Place of Publication |
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Editor |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1726-4189 |
ISBN |
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Medium |
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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 |
1685 |
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Author |
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Title |
Bacterial diversity of autotrophic enriched cultures from remote, glacial Antarctic, Alpine and Andean aerosol, snow and soil samples
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Type |
Journal Article |
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Year |
2009 |
Publication |
Biogeosciences |
Abbreviated Journal |
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Volume |
6 |
Issue |
1 |
Pages |
33-44 |
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Keywords |
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Abstract |
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Programme |
355 |
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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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Publisher |
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Place of Publication |
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Summary Language |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1726-4170 |
ISBN |
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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 |
2843 |
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Author |
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Title |
High frequency Barium profiles in shells of the Great Scallop Pecten maximus: a methodical long-term and multi-site survey in Western Europe |
Type |
Journal Article |
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Year |
2009 |
Publication |
Biogeosciences |
Abbreviated Journal |
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Volume |
6 |
Issue |
2 |
Pages |
157-170 |
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Keywords |
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Abstract |
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Programme |
1090 |
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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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Publisher |
Copernicus Publications |
Place of Publication |
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Editor |
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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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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1726-4189 |
ISBN |
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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 |
3 |
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Author |
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Title |
What can we learn from HF signal scattered from a discrete arc?
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Type |
Journal Article |
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Year |
2009 |
Publication |
Ann. Geophys. |
Abbreviated Journal |
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Volume |
27 |
Issue |
5 |
Pages |
1887 -1896 |
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Keywords |
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Abstract |
We present observations of a discrete southward propagating arc which appeared in the mid-night sector at latitudes equatorward of main substorm activity. The arc observations were made simultaneously by the ALFA (Auroral Light Fine Analysis) optical camera, the SuperDARN-CUTLASS HF radar and the Demeter satellite during a coordinated multi-instrumental campaign conducted at the KEOPS/ESRANGE site in December 2006. The SuperDARN HF signal which is often lost in the regions of strong electron precipitation yields in our case clear backscatter from an isolated arc of weak intensity. Consequently we are able to study arc dynamics, the formation of meso-scale irregularities of the electron density along the arc, compare the arc motion with the convection of surrounding plasma and discuss the contribution of ionospheric ions in the arc erosion and its propagation. |
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Programme |
312;911 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Copernicus Publications |
Place of Publication |
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Editor |
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Summary Language |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1432-0576 |
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 |
2088 |
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Author |
Coco I, Amata E, Marcucci M F, Ambrosino D, Villain J-P, Hanuise C, |
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Title |
The effects of an interplanetary shock on the high-latitude ionospheric convection during an IMF By-dominated period
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Type |
Journal Article |
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Year |
2008 |
Publication |
Ann. Geophys. |
Abbreviated Journal |
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Volume |
26 |
Issue |
9 |
Pages |
2937-2951 |
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Keywords |
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Abstract |
On 6 January 1998 an interplanetary shock hit the magnetosphere around 14:15 UT and caused a reconfiguration of the northern high-latitude ionospheric convection. We use SuperDARN, spacecraft and ground magnetometer data to study such reconfiguration. We find that the shock front was tilted towards the morning flank of the magnetosphere, while the Interplanetary Magnetic Field (IMF) was By-dominated, with By<0, IMF Bz>0 and |By|>>Bz. As expected, the magnetospheric compression started at the first impact point of the shock on the magnetopause causing an increase of the Chapman-Ferraro current from dawn to dusk and yielding an increase of the geomagnetic field at the geostationary orbit and on the ground. Moreover, the high-latitude magnetometer data show vortical structures clearly related to the interaction of the shock with the magnetosphere-ionosphere system. In this context, the SuperDARN convection maps show that at very high latitudes above the northern Cusp and in the morning sector, intense sunward convection fluxes appear, well correlated in time with the SI arrival, having a signature typical for Bz>0 dominated lobe reconnection. We suggest that in this case the dynamic pressure increase associated to the shock plays a role in favouring the setting up of a new lobe merging line albeit |By|>>Bz≥0. |
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Programme |
312;911 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Copernicus Publications |
Place of Publication |
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Editor |
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Language |
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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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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1432-0576 |
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 |
2731 |
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