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Title  |
Evaluation of candidate models for the 13th generation International Geomagnetic Reference Field |
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Journal |
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Year |
2021 |
Publication |
Earth, Planets and Space |
Abbreviated Journal |
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Volume |
73 |
Issue |
1 |
Pages |
48 |
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Keywords |
Geomagnetism IGRF Magnetic field modeling |
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Programme |
139 |
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1880-5981 |
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yes |
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Serial |
7937 |
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Author |
Pengcheng Wang, Natacha B. Bernier, Keith R. Thompson, Tsubasa Kodaira |
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Title |
Evaluation of a global total water level model in the presence of radiational S2 tide |
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Journal |
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Year |
2021 |
Publication |
Ocean Modelling |
Abbreviated Journal |
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Volume |
168 |
Issue |
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Pages |
101893 |
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Keywords |
NEMO Radiational and gravitational tide Storm surge Tidal nudging Total water level |
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688 |
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ISSN |
1463-5003 |
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yes |
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Serial |
8356 |
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Author |
Jun Xie, Risheng Chu, Sidao Ni |
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Title |
Evaluating Global Tomography Models With Antipodal Ambient Noise Cross-Correlation Functions |
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Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Solid Earth |
Abbreviated Journal |
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Volume |
126 |
Issue |
3 |
Pages |
e2020JB020444 |
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Keywords |
ambient noise cross-correlation functions antipodal surface waves mantle heterogeneity tomography model evaluation |
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133 |
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2169-9356 |
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yes |
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7993 |
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Author |
Alexis Burr |
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Year |
2021 |
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Volume |
Thesis started in October 2021 |
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1216 |
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yes |
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Call Number |
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Serial |
8347 |
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Journal |
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Year |
2021 |
Publication |
Atmospheric Chemistry and Physics |
Abbreviated Journal |
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Volume |
21 |
Issue |
4 |
Pages |
3035-3057 |
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Programme |
1192 |
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ISSN |
1680-7316 |
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yes |
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Call Number |
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Serial |
8604 |
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Title |
Effects of Climate and Atmospheric Nitrogen Deposition on Early to Mid-Term Stage Litter Decomposition Across Biomes |
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Journal |
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Year |
2021 |
Publication |
Frontiers in Forests and Global Change |
Abbreviated Journal |
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Volume |
4 |
Issue |
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Abstract |
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Programme |
136 |
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ISSN |
2624-893X |
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Approved |
yes |
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Call Number |
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Serial |
8301 |
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Title |
Echo occurrence in the southern polar ionosphere for the SuperDARN Dome C East and Dome C North radars |
Type |
Journal |
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Year |
2021 |
Publication |
Polar Science |
Abbreviated Journal |
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Volume |
28 |
Issue |
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Pages |
100684 |
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Keywords |
Echo occurrence IRI model Polar cap radars Ray-tracing |
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Abstract |
In this paper, echo occurrence rates for the Dome C East (DCE) and the new Dome C North (DCN) radars are studied. We report the ionospheric and ground scatter echo occurrence rates for selected periods around equinoxes and solstices in the final part of the solar cycle XXIV. The occurrence maps built in Altitude Adjusted Corrected Geomagnetic latitude and Magnetic Local Time coordinates show peculiar patterns highly variable with season. The comparisons of the radar observations with the International Reference Ionosphere model electron density and with ray tracing simulations allow us to explain the major features of observed patterns in terms of electron density variations. The study shows the great potential of the DCE and DCN radar combination to the Super Dual Auroral Radar Network (SuperDARN) convection mapping in terms of monitoring key regions of the high-latitude ionosphere critical for understanding of the magnetospheric dynamics. |
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312 |
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ISSN |
1873-9652 |
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yes |
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Call Number |
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Serial |
8020 |
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Author |
Pamela E. Michael, Chris Wilcox, Christophe Barbraud, Karine Delord, Michael Sumner, Henri Weimerskirch |
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Title |
Dynamic enforcement of bycatch via reproductive value can increase theoretical efficiency |
Type |
Journal |
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Year |
2021 |
Publication |
Marine Policy |
Abbreviated Journal |
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Volume |
132 |
Issue |
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Pages |
104684 |
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Keywords |
Albatross Bycatch Dynamic enforcement Dynamic ocean management Monitoring Reproductive value |
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Abstract |
Managing marine systems is challenging, as many marine species are highly mobile. Albatross exemplify this paradigm, overlapping multiple threats at sea, including bycatch. The typical characterization of bycatch, the number of individuals, ignores the long-term, population-wide repercussions of bycatch. Including an estimate of the reproductive value (RV, the loss of future reproductive contributions, given bycatch) is a complementary tool, incorporating the population-wide repercussions of bycatch. While bycatch management via dynamic spatial management allows management boundaries to move, it requires monitoring and enforcement to be effective. We provide a proof of concept to optimize bycatch enforcement activities by dynamically targeting areas of concentrated future productivity characterized by RV. This paper examined a population of black-browed albatross (Thalassarche melanophris) as a case study. We calculate RV and apply it to at-sea distributions. This creates spatiotemporally explicit surfaces used to prioritize times and locations for bycatch mitigation enforcement. Dynamic enforcement has greater theoretical efficiency than static enforcement, but this difference decreases with increasing population-wide RV subject to enforcement. Though there are implementation challenges, many can be reduced with existing tools providing various opportunities. Incorporating RV when characterizing the impacts of bycatch on a population and strategically applying dynamic bycatch enforcement based on RV can be a powerful, efficient component of dynamic ocean management. |
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109 |
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ISSN |
0308-597X |
ISBN |
0308-597X |
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yes |
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Call Number |
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Serial |
8342 |
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Author |
Najat Bhiry, Dominique Marguerie, Tommy Weetaluktuk, Myosotis Desroches Bourgon, David Aoustin, Pierre M. Desrosiers, Dominique Todisco |
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Title |
Dorset and Thule Inuit occupations of Qikirtajuaq (Smith Island), Nunavik, Canada: a palaeoecological approach |
Type |
Journal |
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Year |
2021 |
Publication |
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Abbreviated Journal |
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Volume |
Boreas |
Issue |
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Pages |
826-843 |
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Abstract |
Qikirtajuaq is a long island facing the Inuit village of Akulivik on the northeastern coast of Hudson Bay (Canada) that is rich in archaeological sites. Kangiakallak-1 (JeGn-2), one of the main sites on this island, is a large multicomponent site that includes Dorset and Thule Inuit winter houses. This study documents the dynamics of palaeoenvironmental conditions in the successive occupations of the Kangiakallak-1 settlement based on plant macrofossils, pollen and non-pollen palynomorph analyses and archaeological research. The data indicate that Dorset inhabitants constructed their dwelling at about 772 cal. a BP. The site was reused by the Thule Inuit a few decades later, starting at about 671 cal. a BP. Thus, Kangiakallak-1 is one of the few sites, at least in Nunavik (northern Quebec, Canada), that were rapidly reoccupied by the Thule Inuit after the departure of the Dorset inhabitants, which indicates a possible overlap between the two cultures in the Akulivik region. The palaeoecological data show that both Dorset and Thule inhabitants left clear footprints at the local scale in the form of several nitrophilous species that became established in and near the houses and persisted over a long period. The deposition of domestic waste (including bone fragments, skin, burnt fat and charcoal fragments) inside the subterranean dwellings fertilized the soil and led to the growth of unique nitrophilous plants. These changes transformed the houses into exceptional floristic refuges. |
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Programme |
1080 |
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ISSN |
0300-9483 |
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yes |
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Call Number |
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Serial |
8520 |
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Title |
Divergence time and species delimitation of microbivalves in the Southern Ocean: the case of Kidderia species |
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Journal |
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Year |
2021 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
44 |
Issue |
7 |
Pages |
1365-1377 |
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Abstract |
The systematics of Subantarctic and Antarctic near-shore marine benthic invertebrates requires major revision and highlights the necessity to incorporate additional sources of information in the specimen identification chart in the Southern Ocean (SO). In this study, we aim to improve our understanding of the biodiversity of Kidderia (Dall 1876) through molecular and morphological comparisons of Antarctic and Subantarctic taxa. The microbivalves of the genus Kidderia are small brooding organisms that inhabit intertidal and shallow subtidal rocky ecosystems. This genus represents an interesting model to test the vicariance and dispersal hypothesis in the biogeography of the SO. However, the description of Kidderia species relies on a few morphological characters and biogeographic records that raise questions about the true diversity in the group. Here we will define the specimens collected with genetic tools, delimiting their respective boundaries across provinces of the SO, validating the presence of two species of Kidderia. Through the revision of taxonomic issues and species delimitation, it was possible to report that the Antarctic species is Kidderia subquadrata and the species recorded in the Subantarctic islands Diego Ramirez, South Georgia and the Kerguelen Archipelago is Kidderia minuta. The divergence time estimation suggests the origin and diversification of Kidderia lineages are related to historical vicariant processes probably associated with the separation of the continental landmasses close to the late Eocene. |
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1044 |
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Edition |
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ISSN |
1432-2056 |
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yes |
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Call Number |
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Serial |
8004 |
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