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Author |
P. Ricaud, E. Bazile, M. del Guasta, C. Lanconelli, P. Grigioni, A. Mahjoub |
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Title |
Genesis of diamond dust, ice fog and thick cloud episodes observed and modelled above Dome C, Antarctica |
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Year |
2017 |
Publication |
Atmos. Chem. Phys. |
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17 |
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8 |
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5221-5237 |
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910 |
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1680-7324 |
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1680-7324 |
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6777 |
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Author |
Armelle Decaulne, Najat Bhiry, Julien Lebrun, Samuel Veilleux, Denis Sarrazin |
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2018 |
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0 |
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0 |
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1-15 |
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We present the results of a study of the morphometric properties of a talus slope in subarctic Quebec (Nunavik) using field-based methods, including geomorphological, granulometric and plant distribution surveys, and statistical analyses. Slope processes are currently active, despite the limited altitudinal difference between the apical-to-distal parts of the slope and the imminent depletion of the debris supply. The near-rectilinear long profiles of the talus highlight the distribution of debris across the slope and demonstrate that free-fall of rock fragments is not the only process operating (redistribution is higher in the westernmost profile, which exhibits a clear concave shape). The spatial distribution of vegetation covering the screes highlights the recent age of parts of the talus, showing that present-day processes are still active, although limited. The short remaining apical rockwall highlights the shortage of debris following deglaciation, as debris are mostly supplied by freeze-thaw processes to the talus, and are then reworked by other processes which need to be better defined in subsequent research. |
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1148 |
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1195-6860 |
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1195-6860 |
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6778 |
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Author |
Hollingsworth James, Ye Lingling, Avouac Jean?Philippe |
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Title |
Dynamically triggered slip on a splay fault in the Mw 7.8, 2016 Kaikoura (New Zealand) earthquake |
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Journal |
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Year |
2017 |
Publication |
Geophysical Research Letters |
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Volume |
44 |
Issue |
8 |
Pages |
3517-3525 |
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Keywords |
correlation earthquake New Zealand rupture seismology slip inversion |
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Abstract We investigate the Mw 7.8, 2016 Kaikoura (New Zealand) earthquake by using optical satellite imagery and seismology to reveal the main features of the rupture process. Correlation of Landsat8 images reveals a 30?40?km surface rupture on the Kekerengu Fault and Jordan Thrust, with up to 12?m of right?lateral slip. A previously unrecognized conjugate strike?slip fault, the Papatea Fault, also slipped coseismically (3?4?m). The global centroid moment tensor (gCMT) centroid indicates both thrust and right?lateral slip and is located ~100?km NE of the main shock epicenter. The significant non?double?couple component of the gCMT (25%) suggests that the main shock is not well represented by a single planar fault. Back projection of teleseismic P waves reveals two main bursts of seismic radiation: (1) at 10?20?s, near the main shock epicenter, and (2) at ~70?s, close to the observed surface ruptures. We determine a finite source kinematic model of the rupture from the inversion of seismic waveforms. We use two faults in our model, defined to match the observed slip on the Kekerengu Fault, and a deeper offshore fault with a lower dip angle to satisfy the long period seismological observations. We compute the equivalent moment tensor from our finite source model and find it to be remarkably consistent with the gCMT solution. Although little is known about the geometry of these faults at depth, if the Kekerengu Fault splays from the deeper thrust, then it provides a rare example where the contribution of slip on a splay fault can be clearly isolated in the seismological waveforms. |
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133 |
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0094-8276 |
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0094-8276 |
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yes |
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6779 |
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Title |
Complex multifault rupture during the 2016 Mw 7.8 Kaik?ura earthquake, New Zealand |
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2017 |
Publication |
Science |
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Volume |
356 |
Issue |
6334 |
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eaam7194 |
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133 |
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0036-8075, 1095-9203 |
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0036-8075, 1095-9203 |
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yes |
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6780 |
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Title |
X-Ray, Radio and SEP Observations of Relativistic Gamma-Ray Events |
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Year |
2017 |
Publication |
Solar Particle Radiation Storms Forecasting and Analysis |
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133-155 |
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The rather frequent occurrence, and sometimes long duration, of ?-ray events at photon energies above 100 MeV challenges our understanding of particle acceleration processes at the Sun. The emission is ascribed to pion-decay photons due to protons with energies above 300 MeV. We study the X-ray and radio emissions and the solar energetic particles (SEPs) in space for a set of 25 Fermi ?-ray events. They are accompanied by strong SEP events, including, in most cases where the parent activity is well-connected, protons above 300 MeV. Signatures of energetic electron acceleration in the corona accompany the impulsive and early post-impulsive ?-ray emission. ?-ray emission lasting several hours accompanies in general the decay phase of long-lasting soft X-ray bursts and decametric-to-kilometric type II bursts. We discuss the impact of these results on the origin of the ?-ray events. |
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227 |
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978-3-319-60050-5 978-3-319-60051-2 |
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978-3-319-60050-5 978-3-319-60051-2 |
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6781 |
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Author |
K.-L. Klein |
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Title |
Relativistic solar particle events (GLEs) and solar eruptive activity |
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Non peer-reviewed symposium |
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2017 |
Publication |
Workshop “10 years nmdb”, athens (greece), 20-23 march 2017 |
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oral; invited talk |
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227 |
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6784 |
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Pazmino, A., S. Godin-beekmann, A. Hauchecorne, C. Claud, F. Lefèvre, S. Khaykin, F. Goutail, J. P. Pommereau, C. Boonne, E. Wolfram, J. Salvador, E. Quel, |
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Evaluation of total ozone recovery inside the Antarctic vortex, |
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Non peer-reviewed symposium |
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2016 |
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209 |
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6785 |
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Author |
Duncan A. Young, Laura E. Lindzey, Donald D. Blankenship, Jamin S. Greenbaum1 and Emmanuel Le Meur |
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Title |
Ice surface elevation change on the George V Coast of East Antarctica: a new hybrid high resolution record |
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2013 |
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1053 |
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6786 |
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Author |
J. Krug, G. Durand, J. Weiss, O. Gagliardini |
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On the effect of undercutting on calving rate using continuum damage mechanic |
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2013 |
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European geosciences union, 8-12 april 2013, vienna, austria. |
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1053 |
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6787 |
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Author |
Etienne Ducasse , Etienne Berthier, Emmanuel Le Meur, Fabien Gillet-chaulet, Gaël Durand, Denis Blumstein |
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Title |
Multitemporal monitoring of astrolabe glacier, terre adelie, antarctica |
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2015 |
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International workshop multitemp 2015, annecy, juillet 2015 |
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1053 |
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6788 |
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