Records |
Author |
Douglas Thomas A, Domine Florent, Barret Manuel, Anastasio Cort, Beine Harry J, Bottenheim Jan, Grannas Amanda, Houdier Stephan, Netcheva Stoyka, Rowland Glenn, Staebler Ralf, Steffen Alexandra, |
Title |
Frost flowers growing in the Arctic ocean-atmosphere-sea ice-snow interface: 1. Chemical composition |
Type |
Journal Article |
Year |
2012 |
Publication |
J. Geophys. Res. |
Abbreviated Journal |
|
Volume |
117 |
Issue |
|
Pages |
D00R09 ST - |
Keywords |
frost flowers polar atmospheric chemistry sea ice 0738 Cryosphere: Ice (1863) 0750 Cryosphere: Sea ice (4540) 0793 Cryosphere: Biogeochemistry (0412, 0414, 1615, 4805, 4912) 1022 Geochemistry: Composition of the hydrosphere 1050 Geochemistry: Marine geochemistry (4835, 4845, 4850), |
Abstract |
Frost flowers, intricate featherlike crystals that grow on refreezing sea ice leads, have been implicated in lower atmospheric chemical reactions. Few studies have presented chemical composition information for frost flowers over time and many of the chemical species commonly associated with Polar tropospheric reactions have never been reported for frost flowers. We undertook this study on the sea ice north of Barrow, Alaska to quantify the major ion, stable oxygen and hydrogen isotope, alkalinity, light absorbance by soluble species, organochlorine, and aldehyde composition of seawater, brine, and frost flowers. For many of these chemical species we present the first measurements from brine or frost flowers. Results show that major ion and alkalinity concentrations, stable isotope values, and major chromophore (NO3- and H2O2) concentrations are controlled by fractionation from seawater and brine. The presence of these chemical species in present and future sea ice scenarios is somewhat predictable. However, aldehydes, organochlorine compounds, light absorbing species, and mercury (part 2 of this research and Sherman et al. (2012)) are deposited to frost flowers through less predictable processes that probably involve the atmosphere as a source. The present and future concentrations of these constituents in frost flowers may not be easily incorporated into future sea ice or lower atmospheric chemistry scenarios. Thinning of Arctic sea ice will likely present more open sea ice leads where young ice, brine, and frost flowers form. How these changing ice conditions will affect the interactions between ice, brine, frost flowers and the lower atmosphere is unknown. |
Programme |
1017 |
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Edition |
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ISSN |
0148-0227 |
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Approved |
yes |
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Serial |
1740 |
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Author |
Elodie Da Silva, Emma R. Woolliams, Nicolas Picot, Jean-Christophe Poisson, Henriette Skourup, Geir Moholdt, Sara Fleury, Sajedeh Behnia, Vincent Favier, Laurent Arnaud, Jérémie Aublanc, Valentin Fouqueau, Nicolas Taburet, Julien Renou, Hervé Yesou, Angelica Tarpanelli, Stefania Camici, Renée Mie Fredensborg Hansen, Karina Nielsen, Frédéric Vivier, François Boy, Roger Fjørtoft, Mathilde Cancet, Ramiro Ferrari, Ghislain Picard, Mohammad J. Tourian, Nicolaas Sneeuw, Eric Munesa, Michel Calzas, Adrien Paris, Emmanuel Le Meur, Antoine Rabatel, Guillaume Valladeau, Pascal Bonnefond, Sylvie Labroue, Ole Andersen, Mahmoud El Hajj, Filomena Catapano, Pierre Féménias |
Title |
Towards Operational Fiducial Reference Measurement (FRM) Data for the Calibration and Validation of the Sentinel-3 Surface Topography Mission over Inland Waters, Sea Ice, and Land Ice |
Type |
Journal |
Year |
2023 |
Publication |
Remote Sensing |
Abbreviated Journal |
|
Volume |
15 |
Issue |
19 |
Pages |
4826 |
Keywords |
FRM inland water surface height land ice height S3 land STM SAR altimeter sea ice thickness uncertainties |
Abstract |
The Copernicus Sentinel-3 Surface Topography Mission (STM) Land Altimetry provides valuable surface elevation information over inland waters, sea ice, and land ice, thanks to its synthetic aperture radar (SAR) altimeter and its orbit that covers high-latitude polar regions. To ensure that these measurements are reliable and to maximise the return on investment, adequate validation of the geophysical retrieval methods, processing algorithms, and corrections must be performed using independent observations. The EU-ESA project St3TART (started July 2021) aims to generalise the concept of Fiducial Reference Measurements (FRMs) for the Copernicus Sentinel-3 STM. This work has gathered existing data, made new observations during field campaigns, and ensured that these observations meet the criteria of FRM standards so that they can be used to validate Sentinel-3 STM Land Altimetry products operationally. A roadmap for the operational provision of the FRM, including the definition, consolidation, and identification of the most relevant and cost-effective methods and protocols to be maintained, supported, or implemented, has been developed. The roadmap includes guidelines for SI traceability, definitions of FRM measurement procedures, processing methods, and uncertainty budget estimations. |
Programme |
411 |
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Edition |
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ISSN |
2072-4292 |
ISBN |
2072-4292 |
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Approved |
yes |
Call Number |
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Serial |
8698 |
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Author |
Cottin Manuelle, Raymond Ben, Kato Akiko, Amélineau Françoise, Maho Yvon Le, Raclot Thierry, Galton-Fenzi Ben, Meijers Andrew, Ropert-Coudert Yan, |
Title |
Foraging strategies of male Adélie penguins during their first incubation trip in relation to environmental conditions
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Type |
Journal Article |
Year |
2012 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
|
Volume |
159 |
Issue |
8 |
Pages |
1843-1852 |
Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
Abstract |
Knowledge of habitat use by top marine predators in response to environmental conditions is crucial in the current context of global changes occurring in the Southern Ocean. We examined the at-sea locations of male Ad,lie penguins (Pygoscelis adeliae) breeding at Dumont d'Urville during their first, long incubation trip. Compared with the chick-rearing period, penguins performed longer trips, going to oceanic waters as far as 320 km from the colony. We observed 3 strategies: (1) five individuals covered large distances to the north, targeting open-ocean areas and following the currents of two persistent eddies; (2) five individuals foraged to the north-west, close to the Antarctic shelf slope at the limit of the pack ice; and (3) three individuals covered much shorter distances (northwards or eastwards). The foraging range also seemed to be limited by the body condition of the penguins before their departure to sea. |
Programme |
1091 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
Publisher |
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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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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0025-3162 |
ISBN |
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Medium |
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Area |
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Approved |
yes |
Call Number |
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Serial |
4285 |
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Author |
Kaiser Stefanie, Brandão Simone N, Brix Saskia, Barnes David K A, Bowden David A, Ingels Jeroen, Leese Florian, Schiaparelli Stefano, Arango Claudia P, Badhe Renuka, Bax Narissa, Blazewicz-Paszkowycz Magdalena, Brandt Angelika, Brenke Nils, Catarino Ana I, David Bruno, Ridder Chantal De, Dubois Philippe, Ellingsen Kari E, Glover Adrian G, Griffiths Huw J, Gutt Julian, Halanych Kenneth M, Havermans Charlotte, Held Christoph, Janussen Dorte, Lörz Anne-Nina, Pearce David A, Pierrat Benjamin, Riehl Torben, Rose Armin, Sands Chester J, Soler-Membrives Anna, Schüller Myriam, Strugnell Jan M, Vanreusel Ann, Veit-Köhler Gritta, Wilson Nerida G, Yasuhara Moriaki, |
Title |
Patterns, processes and vulnerability of Southern Ocean benthos: a decadal leap in knowledge and understanding
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Type |
Journal Article |
Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar. Biol. |
Volume |
160 |
Issue |
9 |
Pages |
2295-2317 |
Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
Abstract |
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Programme |
1044;1124 |
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Thesis |
Bachelor's thesis |
Publisher |
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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 Volume |
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Series Issue |
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Edition |
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ISSN |
0025-3162 |
ISBN |
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Medium |
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Area |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
4308 |
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Author |
Giraldo Carolina, Mayzaud Patrick, Tavernier Eric, Irisson Jean-Olivier, Penot Florian, Becciu Jonathan, Chartier Amélie, Boutoute Marc, Koubbi Philippe, |
Title |
Lipid components as a measure of nutritional condition in fish larvae (Pleuragramma antarcticum) in East Antarctica
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Type |
Journal Article |
Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar Biol |
Volume |
160 |
Issue |
4 |
Pages |
877-887 |
Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
Abstract |
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Programme |
1142 |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Edition |
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ISSN |
0025-3162 |
ISBN |
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Medium |
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Area |
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Approved |
yes |
Call Number |
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Serial |
4396 |
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Author |
Chaigne Adrien, Authier Matthieu, Richard Pierre, Cherel Yves, Guinet Christophe, |
Title |
Shift in foraging grounds and diet broadening during ontogeny in southern elephant seals from Kerguelen Islands
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Type |
Journal Article |
Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar. Biol. |
Volume |
160 |
Issue |
4 |
Pages |
977-986 |
Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
Abstract |
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Programme |
109 |
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Address |
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Thesis |
Bachelor's thesis |
Publisher |
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Place of Publication |
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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 |
0025-3162 |
ISBN |
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Medium |
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Approved |
yes |
Call Number |
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Serial |
4402 |
Permanent link to this record |
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Author |
Vaillant Maryline Le, Bohec Céline Le, Wienecke Barbara, Maho Yvon Le, Kato Akiko, Ropert-Coudert Yan, |
Title |
How age and sex drive the foraging behaviour in the king penguin
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Type |
Journal Article |
Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
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Volume |
160 |
Issue |
5 |
Pages |
1147-1156 |
Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
Abstract |
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Programme |
137 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
Publisher |
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Place of Publication |
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Editor |
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Language |
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Series Editor |
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Series Title |
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Edition |
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ISSN |
0025-3162 |
ISBN |
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Approved |
yes |
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Serial |
4464 |
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Author |
Serdal Ayhan, Mario Pauli, Steffen Scherr, Benjamin Göttel, Akanksha Bhutani, Sven Thomas, Timo Jaeschke, Jean-Michel Panel, Frédéric Vivier, Laurence Eymard, Alain Weill, Nils Pohl, Thomas Zwick |
Title |
Millimeter-Wave Radar Sensor for Snow Height Measurements |
Type |
Journal |
Year |
2017 |
Publication |
IEEE Transactions on Geoscience and Remote Sensing |
Abbreviated Journal |
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Volume |
55 |
Issue |
2 |
Pages |
854-861 |
Keywords |
Frequency-modulated continuous-wave (FMCW) radar high accuracy Laser radar Measurement by laser beam millimeter wave Millimeter wave radar Radar measurements range detection Snow snow height snow thickness Temperature measurement |
Abstract |
A small and lightweight frequency-modulated continuous-wave (FMCW) radar system is used for the determination of snow height by measuring the distance to the snow surface from a platform. The measurements have been performed at the Centre des Études de la Neige (Col de Porte), which is located near Grenoble in the French Alps. It is shown that the FMCW radar at millimeter-wave frequencies is an extremely promising approach for distance measurements to snow surfaces, e.g., in the mountains or in an Arctic environment. The characteristics of the radar sensor are described in detail. The relevant accuracy to measure the distance to a snow layer is shown at different heights and over an extended time duration. A dedicated laser snow telemeter is used as reference. In addition, the reflection from different types of snow is shown. |
Programme |
1015 |
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ISSN |
1558-0644 |
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Approved |
yes |
Call Number |
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Serial |
8161 |
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Author |
ZalianCyrus, ChadidMerieme, |
Title |
Antarctica photometric survey using PDM13
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Type |
Conference - International - Article with Reading Comitee |
Year |
2013 |
Publication |
Proceedings of the International Astronomical Union |
Abbreviated Journal |
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Volume |
9 |
Issue |
Symposium S301 |
Pages |
511-512 |
Keywords |
Frequency analysis, phase dispersion minimization, graphical interface, Antarctica photometric survey, |
Abstract |
PDM13 is a new graphic interface program dedicated to frequency domain analysis based on the Phase Dispersion Minimization technique (PDM, Stellingwerf 2012). In this paper, we will present the different algorithms running in PDM13, including the Auto-Segmentation, the Gauss-Newton and the PDM algorithms. More details on this triptych are available in our recent paper (Zalian et al., submitted). Their aim is to offer a simple and powerful way to extract frequency. Amongst the numerous improvements offered by the program, we will particularly focus on the reduction of aliases and the ability to look directly for multiple-period phenomena and the Blazhko effect. After that, we will show the first results from PDM13 using the Antarctica photometric survey. |
Programme |
1096 |
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yes |
Call Number |
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Serial |
4908 |
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Author |
Stéphanie Jenouvrier, Lise M. Aubry, Christophe Barbraud, Henri Weimerskirch, Hal Caswell |
Title |
Interacting effects of unobserved heterogeneity and individual stochasticity in the life history of the southern fulmar |
Type |
Journal |
Year |
2017 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
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Volume |
87 |
Issue |
1 |
Pages |
212-222 |
Keywords |
frailty individual quality latent life expectancy lifetime reproductive success |
Abstract |
Individuals are heterogeneous in many ways. Some of these differences are incorporated as individual states (e.g. age, size, breeding status) in population models. However, substantial amounts of heterogeneity may remain unaccounted for, due to unmeasurable genetic, maternal or environmental factors. Such unobserved heterogeneity (UH) affects the behaviour of heterogeneous cohorts via intra-cohort selection and contributes to inter-individual variance in demographic outcomes such as longevity and lifetime reproduction. Variance is also produced by individual stochasticity, due to random events in the life cycle of wild organisms, yet no study thus far has attempted to decompose the variance in demographic outcomes into contributions from UH and individual stochasticity for an animal population in the wild. We developed a stage-classified matrix population model for the southern fulmar breeding on Ile des Pétrels, Antarctica. We applied multievent, multistate mark–recapture methods to estimate a finite mixture model accounting for UH in all vital rates and Markov chain methods to calculate demographic outcomes. Finally, we partitioned the variance in demographic outcomes into contributions from UH and individual stochasticity. We identify three UH groups, differing substantially in longevity, lifetime reproductive output, age at first reproduction and in the proportion of the life spent in each reproductive state. –14% of individuals at fledging have a delayed but high probability of recruitment and extended reproductive life span. –67% of individuals are less likely to reach adulthood, recruit late and skip breeding often but have the highest adult survival rate. –19% of individuals recruit early and attempt to breed often. They are likely to raise their offspring successfully, but experience a relatively short life span. Unobserved heterogeneity only explains a small fraction of the variances in longevity (5.9%), age at first reproduction (3.7%) and lifetime reproduction (22%). UH can affect the entire life cycle, including survival, development and reproductive rates, with consequences over the lifetime of individuals and impacts on cohort dynamics. The respective role of UH vs. individual stochasticity varies greatly among demographic outcomes. We discuss the implication of our finding for the gradient of life-history strategies observed among species and argue that individual differences should be accounted for in demographic studies of wild populations. |
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109 |
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Edition |
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1365-2656 |
ISBN |
1365-2656 |
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Approved |
yes |
Call Number |
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Serial |
7165 |
Permanent link to this record |