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Title  |
A compact incoherent broadband cavity-enhanced absorption spectrometer for trace detection of nitrogen oxides, iodine oxide and glyoxal at levels below parts per billion for field applications |
Type |
Journal |
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Year |
2020 |
Publication |
Atmospheric Measurement Techniques |
Abbreviated Journal |
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Volume |
13 |
Issue |
8 |
Pages |
4317-4331 |
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Programme |
1028,1177 |
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Bachelor's thesis |
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ISSN |
1867-1381 |
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yes |
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Call Number |
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Serial |
7854 |
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Title |
A comprehensive quantification of global nitrous oxide sources and sinks |
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Journal |
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Year |
2020 |
Publication |
Nature |
Abbreviated Journal |
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Volume |
586 |
Issue |
7828 |
Pages |
248-256 |
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416 |
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ISSN |
1476-4687 |
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1476-4687 |
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yes |
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Serial |
7968 |
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Title |
A framework for mapping the distribution of seabirds by integrating tracking, demography and phenology |
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Journal |
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Year |
2020 |
Publication |
Journal of Applied Ecology |
Abbreviated Journal |
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Volume |
57 |
Issue |
3 |
Pages |
514-525 |
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Keywords |
albatrosses at-sea threats conservation distributions longline fisheries megafauna petrels seabird density |
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Abstract |
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Programme |
388 |
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ISSN |
1365-2664 |
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yes |
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Call Number |
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Serial |
7655 |
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Title |
A geochemical investigation of an Early Inuit semi-subterranean winter dwelling in a periglacial context |
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Journal |
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Year |
2020 |
Publication |
Journal of archaeological science: reports |
Abbreviated Journal |
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Volume |
33 |
Issue |
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Pages |
102552 |
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Keywords |
C-N analysis Cryosolic soils geochemistry FTIR ICP-AES Inuit archaeology Nunavik Semi-subterranean house |
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Abstract |
Geochemical investigations using FTIR, ICP-AES and C-N analyses were carried out on a single-family semi-subterranean Inuit house in order to assess the contribution of Inuit domestic activities in the formation of cryosolic soils in a periglacial archaeological context (Kuuvik Bay, Nunavik, Canada). The geochemical elements data were analyzed using box plots and enrichment factors. The information was also summarized and visualized through principal component analysis (PCA). These complementary statistical approaches provided evidence of a moderate but identifiable and significant imprint of Inuit domestic activities on soil geochemistry. The box plots indicate moderate Ca, Mn, Cu and P enrichments and more noticeable Mg, Fe and S enrichments. These enrichment factors and the ICP-AES data show that samples from the peripheral wall and the tunnel entrance of the house and its vicinity are significantly enriched. While FTIR analysis highlighted the main soil element contents (e.g., organic and mineral components), ICP-AES analysis was used to further document variations in the background elements throughout the site. However, the obtained results do not allow us to undertake a spatial analysis of Inuit activities or to describe them in detail. In addition, the data highlight the difficulty of documenting the natural variability of element contents in cryosolic soils, especially in archaeological contexts. Cryo-pedological processes in the active layer as well as house cleaning and nutrient inputs resulting from Inuit occupations may have attenuated chemical signatures of previous Inuit domestic activities. |
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Programme |
1080 |
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Campaign |
LOTECHAIN |
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Thesis |
Bachelor's thesis |
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ISSN |
2352-409X |
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Approved |
yes |
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Call Number |
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Serial |
8206 |
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Author |
Weisen Shen, Douglas A. Wiens, Andrew J. Lloyd, Andrew A. Nyblade |
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Title |
A Geothermal Heat Flux Map of Antarctica Empirically Constrained by Seismic Structure |
Type |
Journal |
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Year |
2020 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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Volume |
47 |
Issue |
14 |
Pages |
e2020GL086955 |
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Keywords |
Antarctica crust and uppermost mantle geothermal heat flux ice sheet modeling |
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Abstract |
The geothermal heat flux (GHF) is an important boundary condition for modeling the movement of the Antarctic ice sheet but is difficult to measure systematically at a continental scale. Earlier GHF maps suffer from low resolution and possibly biased assumptions in tectonism and crustal heat generation, resulting in significant uncertainty. We present a new GHF map for Antarctica constructed by empirically relating the upper mantle structure to known GHF in the continental United States. The new map, compared with previously seismologically determined one, has improved resolution and lower uncertainties. New features in this map include high GHF in the southern Transantarctic Mountains where warmer uppermost mantle is introduced by lithospheric removal and in the Thwaites Glacier region. Additionally, a modest GHF in the central West Antarctic Rift system near the Siple Coast and an absence of large-scale regions with GHF greater than 90 mW/m2 are found. |
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Programme |
133 |
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Edition |
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ISSN |
1944-8007 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7887 |
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Author |
Sanne Muis, Maialen Irazoqui Apecechea, Job Dullaart, Joao de Lima Rego, Kristine Skovgaard Madsen, Jian Su, Kun Yan, Martin Verlaan |
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Title |
A High-Resolution Global Dataset of Extreme Sea Levels, Tides, and Storm Surges, Including Future Projections |
Type |
Journal |
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Year |
2020 |
Publication |
Frontiers in Marine Science |
Abbreviated Journal |
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Volume |
7 |
Issue |
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Pages |
263 |
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Keywords |
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Abstract |
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Programme |
688 |
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Series Issue |
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Edition |
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ISSN |
2296-7745 |
ISBN |
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Conference |
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Approved |
yes |
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Call Number |
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Serial |
8031 |
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Author |
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Title |
A Micro-Mechanical Model for the Transformation of Dry Polar Firn Into Ice Using the Level-Set Method |
Type |
Journal |
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Year |
2020 |
Publication |
Frontiers in Earth Science |
Abbreviated Journal |
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Volume |
8 |
Issue |
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Pages |
101 |
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Keywords |
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Abstract |
Interpretation of greenhouse gas records in polar ice cores requires a good understanding of the mechanisms controlling gas trapping in polar ice, and therefore of the processes of densification and pore closure in firn (compacted snow). Current firn densification models are based on a macroscopic description of the firn and rely on empirical laws and/or idealized geometries to obtain the equations governing the densification and pore closure. Here, we propose a physically-based methodology explicitly representing the porous structure and its evolution over time. In order to handle the complex geometry and topological changes that occur during firn densification, we rely on a Level-Set representation of the interface between the ice and the pores. Two mechanisms are considered for the displacement of the interface: (i) mass surface diffusion driven by local pore curvature and (ii) ice dislocation creep. For the latter, ice is modeled as a viscous material and the flow velocities are solutions of the Stokes equations. First applications show that the model is able to densify firn and split pores. Using the model in cold and arid conditions of the Antarctic plateau, we show that gas trapping models do not have to consider the reduced compressibility of closed pores compared to open pores in the deepest part of firns. Our results also suggest that the mechanism of curvature-driven surface diffusion does not result in pore splitting, and that ice creep has to be taken into account for pores to close. Future applications of this type of model could help quantify the evolution and closure of firn porous networks for various accumulation and temperature conditions. |
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Programme |
1153 |
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ISSN |
2296-6463 |
ISBN |
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yes |
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Call Number |
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Serial |
8268 |
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Author |
Tranchant Y.-T., C. Chupin, L. Testut, V. Ballu, O. Laurain, P. Bonnefond |
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Title |
A new high-resolution coastal model in Kerguelen Island for CAL/VAL operations |
Type |
Peer-reviewed symposium |
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Year |
2020 |
Publication |
12th coastal altimetry workshop coastal altimetry training, 4-7 february 2020, esa-esrin, frascati, italy |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Abstract |
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Programme |
688 |
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Approved |
yes |
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Call Number |
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Serial |
8494 |
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Author |
Yves Cherel |
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Title |
A review of Southern Ocean squids using nets and beaks |
Type |
Journal |
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Year |
2020 |
Publication |
Marine Biodiversity |
Abbreviated Journal |
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Volume |
50 |
Issue |
6 |
Pages |
98 |
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Abstract |
This review presents an innovative approach to investigate the teuthofauna from the Southern Ocean by combining two complementary data sets, the literature on cephalopod taxonomy and biogeography, together with predator dietary investigations. Sixty squids were recorded south of the Subtropical Front, including one circumpolar Antarctic (Psychroteuthis glacialis Thiele, 1920), 13 circumpolar Southern Ocean, 20 circumpolar subantarctic, eight regional subantarctic, and 12 occasional subantarctic species. A critical evaluation removed five species from the list, and one species has an unknown taxonomic status. The 42 Southern Ocean squids belong to three large taxonomic units, bathyteuthoids (n?=?1 species), myopsids (n?=?1), and oegopsids (n?=?40). A high level of endemism (21 species, 50%, all oegopsids) characterizes the Southern Ocean teuthofauna. Seventeen families of oegopsids are represented, with three dominating families, onychoteuthids (seven species, five endemics), ommastrephids (six species, three endemics), and cranchiids (five species, three endemics). Recent improvements in beak identification and taxonomy allowed making new correspondence between beak and species names, such as Galiteuthis suhmi (Hoyle 1886), Liguriella podophtalma Issel, 1908, and the recently described Taonius notalia Evans, in prep. Gonatus phoebetriae beaks were synonymized with those of Gonatopsis octopedatus Sasaki, 1920, thus increasing significantly the number of records and detailing the circumpolar distribution of this rarely caught Southern Ocean squid. The review extends considerably the number of species, including endemics, recorded from the Southern Ocean, but it also highlights that the corresponding species to two well-described beaks (Moroteuthopsis sp. B and Psychroteuthis sp. B) are still unknown. |
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Programme |
109 |
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ISSN |
1867-1624 |
ISBN |
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Approved |
yes |
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Serial |
8072 |
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Author |
David Renault |
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Title |
A Review of the Phenotypic Traits Associated with Insect Dispersal Polymorphism, and Experimental Designs for Sorting out Resident and Disperser Phenotypes |
Type |
Journal |
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Year |
2020 |
Publication |
Insects |
Abbreviated Journal |
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Volume |
11 |
Issue |
4 |
Pages |
214 |
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Keywords |
fecundity hostile matrix life-history mating morphology movement range expansion reproduction wing-dimorphic wing-monomorphic |
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Abstract |
Dispersal represents a key life-history trait with several implications for the fitness of organisms, population dynamics and resilience, local adaptation, meta-population dynamics, range shifting, and biological invasions. Plastic and evolutionary changes of dispersal traits have been intensively studied over the past decades in entomology, in particular in wing-dimorphic insects for which literature reviews are available. Importantly, dispersal polymorphism also exists in wing-monomorphic and wingless insects, and except for butterflies, fewer syntheses are available. In this perspective, by integrating the very latest research in the fast moving field of insect dispersal ecology, this review article provides an overview of our current knowledge of dispersal polymorphism in insects. In a first part, some of the most often used experimental methodologies for the separation of dispersers and residents in wing-monomorphic and wingless insects are presented. Then, the existing knowledge on the morphological and life-history trait differences between resident and disperser phenotypes is synthetized. In a last part, the effects of range expansion on dispersal traits and performance is examined, in particular for insects from range edges and invasion fronts. Finally, some research perspectives are proposed in the last part of the review. |
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Programme |
136 |
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Thesis |
Bachelor's thesis |
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Approved |
yes |
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Call Number |
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Serial |
7656 |
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