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Author |
Favier Vincent, Agosta Ccile, Genthon Christophe, Arnaud Laurent, Trouvillez Alexandre, Galle Hubert, |
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Title |
Modeling the mass and surface heat budgets in a coastal blue ice area of Adelie Land, Antarctica
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Type |
Journal Article |
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Year |
2011 |
Publication |
J. Geophys. Res. |
Abbreviated Journal |
0148-0227 |
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Volume |
116 |
Issue |
F3 |
Pages |
F03017- |
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Keywords |
Antarctica, blue ice, cryosphere, energy balance, melting, 0738 Cryosphere: Ice (1863), 0762 Cryosphere: Mass balance (1218, 1223), 0764 Cryosphere: Energy balance, 0768 Cryosphere: Thermal regime, 0798 Cryosphere: Modeling (1952, 4316), |
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Abstract |
Meteorological data recorded from 12 December 2008 to 30 June 2010 were analyzed to assess the surface energy balance (SEB) in a blue ice area of Cap Prudhomme, Adelie Land (6641′S, 13955′E). The SEB was computed with a newly developed model forced by direct measurements and with a voluntarily limited number of parameters to better assess model sensitivity. Incoming short-wave radiation was corrected for the slope and orientation of the local terrain assuming direct and diffuse radiation components. Turbulent heat fluxes were assessed using the bulk aerodynamic approach. Heat conduction in the ice was computed by solving the thermal diffusion equation. Snow accumulation was modeled using ERA interim total precipitation and a one-dimensional erosion model. The surface heat budget and accumulation/erosion model accurately reproduced field observations. The occurrence of blue ice is linked with higher rates of erosion than in the surrounding snow covered areas, which may be caused by local flow divergence or snow not being redistributed from higher elevations. Melting occurs between December and February when incoming short-wave radiation is high. However, the SEB was closely linked to air temperature through the incoming long-wave radiation and the turbulent sensible heat flux. Several warm events caused by cyclones intruding into the continent led to significant warming of the ice and high melting rates. Intruding cyclones were also associated with high precipitation that led to significant accumulation. Except in blue ice areas, modeling suggests that expected higher precipitation in a warmer climate will result in more accumulation.
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411;1013 |
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Bachelor's thesis |
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AGU |
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0148-0227 |
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yes |
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3294 |
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Author |
Saraux Claire, Le Bohec Celine, Durant Joel M, Viblanc Vincent A, Gauthier-Clerc Michel, Beaune David, Park Young-Hyang, Yoccoz Nigel G, Stenseth Nils C, Le Maho Yvon, |
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Title |
Reliability of flipper-banded penguins as indicators of climate change
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Type |
Journal Article |
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Year |
2011 |
Publication |
NATURE |
Abbreviated Journal |
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Volume |
469 |
Issue |
7329 |
Pages |
203-206 |
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Programme |
137 |
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Bachelor's thesis |
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Publisher |
Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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0028-0836 |
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yes |
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3300 |
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Author |
Koubbi Philippe, O'Brien Colleen, Loots Christophe, Giraldo Carolina, Smith Martina, Tavernier Eric, Vacchi Marino, Vallet Carole, Chevallier Jean, Moteki Masato, |
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Title |
Spatial distribution and inter-annual variations in the size frequency distribution and abundances of Pleuragramma antarcticum larvae in the Dumont dUrville Sea from 2004 to 2010
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Type |
Journal Article |
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Year |
2011 |
Publication |
Polar Science |
Abbreviated Journal |
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Volume |
5 |
Issue |
2 |
Pages |
225-238 |
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Keywords |
Pleuragramma antarcticum, East Antarctic shelf, Fish larvae, Life cycle, Inter-annual variations, |
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Abstract |
This paper investigates the abundance and distribution of Pleuragramma antarcticum larvae by size class in the Dumont dUrville Sea from 2004 to 2010. Samples were collected between Dumont dUrville station and the Mertz Glacier Tongue onboard the RV lAstrolabe for studying the inter-annual and spatial distribution of fish larvae and the TRV Umitaka Maru for looking at life stages vertical distributions. The seabed depression adjacent to the Mertz Glacier Tongue and in Commonwealth Bay hosted high abundances of small P. antarcticum larvae, while larger larvae were found in lower abundance and further offshore. We found that canyons, sea ice, stability of the water column and temperatures are important features for determining suitable areas for young larvae. |
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Programme |
1142 |
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Bachelor's thesis |
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ISSN |
1873-9652 |
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yes |
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Serial |
3301 |
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Author |
Hosie Graham, Koubbi Philippe, Riddle Martin, Ozouf-Costaz Catherine, Moteki Masato, Fukuchi Mitsuo, Ameziane Nadia, Ishimaru Takashi, Goffart Anne, |
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Title |
CEAMARC, the Collaborative East Antarctic Marine Census for the Census of Antarctic Marine Life (IPY # 53): An overview
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Type |
Journal Article |
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Year |
2011 |
Publication |
Polar Science |
Abbreviated Journal |
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Volume |
5 |
Issue |
2 |
Pages |
75-87 |
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Keywords |
CEAMARC, CAML, Marine biodiversity, Pelagic, Benthos, |
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Abstract |
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Programme |
1124;1142 |
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Bachelor's thesis |
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1873-9652 |
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yes |
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Call Number |
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Serial |
3316 |
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Author |
Moteki Masato, Koubbi Philippe, Pruvost Patrice, Tavernier Eric, Hulley Percy-Alexander, |
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Title |
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Type |
Journal Article |
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Year |
2011 |
Publication |
Polar Science |
Abbreviated Journal |
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Volume |
5 |
Issue |
2 |
Pages |
211-224 |
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Keywords |
Pelagic fish, Community structure, East Antarctica, Mesopelagic fish, Notothenioids, |
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Abstract |
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Programme |
1142 |
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Thesis |
Bachelor's thesis |
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ISSN |
1873-9652 |
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yes |
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Call Number |
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Serial |
3328 |
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Author |
Delmont Tom O, Malandain Cedric, Prestat Emmanuel, Larose Catherine, Monier Jean-Michel, Simonet Pascal, Vogel Timothy M, |
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Title |
Metagenomic mining for microbiologists
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Type |
Journal Article |
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Year |
2011 |
Publication |
ISME JOURNAL |
Abbreviated Journal |
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Volume |
5 |
Issue |
12 |
Pages |
1837-1843 |
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Abstract |
Microbial ecologists can now start digging into the accumulating mountains of metagenomic data to uncover the occurrence of functional genes and their correlations to microbial community members. Limitations and biases in DNA extraction and sequencing technologies impact sequence distributions, and therefore, have to be considered. However, when comparing metagenomes from widely differing environments, these fluctuations have a relatively minor role in microbial community discrimination. As a consequence, any functional gene or species distribution pattern can be compared among metagenomes originating from various environments and projects. In particular, global comparisons would help to define ecosystem specificities, such as involvement and response to climate change (for example, carbon and nitrogen cycle), human health risks (eg, presence of pathogen species, toxin genes and viruses) and biodegradation capacities. Although not all scientists have easy access to high-throughput sequencing technologies, they do have access to the sequences that have been deposited in databases, and therefore, can begin to intensively mine these metagenomic data to generate hypotheses that can be validated experimentally. Information about metabolic functions and microbial species compositions can already be compared among metagenomes from different ecosystems. These comparisons add to our understanding about microbial adaptation and the role of specific microbes in different ecosystems. Concurrent with the rapid growth of sequencing technologies, we have entered a new age of microbial ecology, which will enable researchers to experimentally confirm putative relationships between microbial functions and community structures. |
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Programme |
399 |
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Bachelor's thesis |
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Publisher |
International Society for Microbial Ecology |
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ISSN |
1751-7362 |
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yes |
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Serial |
3335 |
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Author |
Gilg, O., B. Sittler, And I. Hanski. |
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Book Chapter |
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2011 |
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Programme |
1036 |
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Bachelor's thesis |
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yes |
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3342 |
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Author |
Gauthier, G., Doyle, F. I., Gilg, O., Menyushina, I. E., Morrison, R. I. G., Ovsyanikov, N., Pokrovsky, I., Reid, D. G., Sokolov, A. and Therrien, J.-F. |
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Title |
Birds of prey. |
Type |
Book Chapter |
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Year |
2011 |
Publication |
ArcticWOLVES: Arctic Wildlife Observatories Linking Vulnerable EcoSystems. |
Abbreviated Journal |
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1036 |
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Bachelor's thesis |
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yes |
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3343 |
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Title |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation
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Journal Article |
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Year |
2012 |
Publication |
Climate Dynamics |
Abbreviated Journal |
0930-7575 |
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Volume |
38 |
Issue |
1 |
Pages |
75-86 |
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Keywords |
Earth and Environmental Science, |
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Abstract |
The GLACIOCLIM-SAMBA (GS) Antarctic accumulation monitoring network, which extends from the coast of Adelie Land to the Antarctic plateau, has been surveyed annually since 2004. The network includes a 156-km stake-line from the coast inland, along which accumulation shows high spatial and interannual variability with a mean value of 362 mm water equivalent a 1 . In this paper, this accumulation is compared with older accumulation reports from between 1971 and 1991. The mean and annual standard deviation and the km-scale spatial pattern of accumulation were seen to be very similar in the older and more recent data. The data did not reveal any significant accumulation trend over the last 40 years. The ECMWF analysis-based forecasts (ERA-40 and ERA-Interim), a stretched-grid global general circulation model (LMDZ4) and three regional circulation models (PMM5, MAR and RACMO2), all with high resolution over Antarctica (27125 km), were tested against the GS reports. They qualitatively reproduced the meso-scale spatial pattern of the annual-mean accumulation except MAR. MAR significantly underestimated mean accumulation, while LMDZ4 and RACMO2 overestimated it. ERA-40 and the regional models that use ERA-40 as lateral boundary condition qualitatively reproduced the chronology of interannual variability but underestimated the magnitude of interannual variations. Two widely used climatologies for Antarctic accumulation agreed well with the mean GS data. The model-based climatology was also able to reproduce the observed spatial pattern. These data thus provide new stringent constraints on models and other large-scale evaluations of the Antarctic accumulation. |
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411;1013 |
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Bachelor's thesis |
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Springer Berlin / Heidelberg |
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0930-7575 |
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yes |
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3347 |
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Author |
Joliet F. |
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Title |
Onlookers make the landscape: an inuit landscape imagery for the Tursujuq national Park Project (Nunavik, Canada)
Colloque International ICAS VII, juin 2011, 22-26 juin, Akureyri, Islande |
Type |
Conference - International - Communication |
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Year |
2011 |
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1043 |
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Bachelor's thesis |
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yes |
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Call Number |
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3357 |
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