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Title |
Contextual variations in calls of two nonoscine birds: the blue petrel Halobaena caerulea and the Antarctic prion Pachyptila desolata |
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Year |
2021 |
Publication |
Behavioral Ecology |
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Volume |
32 |
Issue |
4 |
Pages |
769-779 |
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354 |
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1045-2249 |
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yes |
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8259 |
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Author |
David Byrne, Jeff Polton, Colin Bell |
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Title |
Creation of a global tide analysis dataset: Application of NEMO and an offline objective analysis scheme |
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Year |
2021 |
Publication |
Journal of Operational Oceanography |
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Pages |
1-14 |
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Abstract |
The accurate prediction of tides is vital for the operation of many industries, early warning of coastal flooding and scientific understanding of ocean processes. In this paper, we describe the creation method of a global dataset of tidal harmonics using NEMO (Nucleus for European Modelling of the Ocean) for the first time and an offline objective analysis scheme. Data are assimilated as part of a post-processing step, reducing the computational resources required. A reduced ensemble of tidal harmonics is generated, where each member is run for a shorter period of time than a central background state. This ensemble is used to estimate a single background covariance state, which is used for analysis. Output is validated using an ensemble of objective analyses. For each ensemble member, random selections of observations are omitted and validation is performed at these locations. Improvements in both Mean Absolute Error (MAE) and correlation coefficients (R2) are seen across all 6 of the largest diurnal and semi-diurnal constituents. MAEs in amplitude and phase are reduced by up to 78% and 89%, respectively, and correlations by as much as 0.14. In addition, the majority of locations (between 70 and 80%) see significant improvement. |
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688 |
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1755-876X |
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1755-876X |
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yes |
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Serial |
8338 |
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Author |
Natasha Roy, James Woollett, Najat Bhiry, Isabel Lemus-Lauzon, Ann Delwaide, Dominique Marguerie |
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Title |
Anthropogenic and climate impacts on subarctic forests in the Nain region, Nunatsiavut: Dendroecological and historical approaches |
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Journal |
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Year |
2021 |
Publication |
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Abbreviated Journal |
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Volume |
28 |
Issue |
3-4 |
Pages |
361-376 |
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1080 |
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1195-6860 |
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yes |
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Serial |
8251 |
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Author |
Alain Royer, Florent Domine, Alexandre Roy, Alexandre Langlois, Nicolas Marchand, Gautier Davesne |
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Title |
New northern snowpack classification linked to vegetation cover on a latitudinal mega-transect across northeastern Canada |
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Year |
2021 |
Publication |
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Abbreviated Journal |
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Issue |
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Pages |
1-18 |
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1042 |
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1195-6860 |
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1195-6860 |
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yes |
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7971 |
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Title |
Fifty million years of beetle evolution along the Antarctic Polar Front |
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Journal |
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Year |
2021 |
Publication |
Proceedings of the National Academy of Sciences |
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Volume |
118 |
Issue |
24 |
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Keywords |
Antarctica herbivory island biogeography paleoclimate species radiation |
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136 |
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0027-8424, 1091-6490 |
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yes |
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Serial |
8087 |
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Author |
Mike Lockwood, Carl Haines, Luke A. Barnard, Mathew J. Owens, Chris J. Scott, Aude Chambodut, Kathryn A. McWilliams |
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Title |
Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 4. Polar Cap motions and origins of the Universal Time effect |
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Year |
2021 |
Publication |
Journal of Space Weather and Space Climate |
Abbreviated Journal |
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Volume |
11 |
Issue |
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Pages |
15 |
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Programme |
139 |
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ISSN |
2115-7251 |
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yes |
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Serial |
8076 |
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Title |
The ? Pictoris b Hill sphere transit campaign – I. Photometric limits to dust and rings |
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Journal |
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Year |
2021 |
Publication |
Astronomy & Astrophysics |
Abbreviated Journal |
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Volume |
648 |
Issue |
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Pages |
A15 |
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Programme |
1066 |
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ISSN |
0004-6361, 1432-0746 |
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Approved |
yes |
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Call Number |
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Serial |
8195 |
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Journal |
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Year |
2021 |
Publication |
Communications Earth & Environment |
Abbreviated Journal |
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Volume |
2 |
Issue |
1 |
Pages |
1-8 |
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Keywords |
Physical oceanography |
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Abstract |
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Programme |
688 |
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ISSN |
2662-4435 |
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Approved |
yes |
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Call Number |
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Serial |
8387 |
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Title |
Fine-scale structures as spots of increased fish concentration in the open ocean |
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Journal |
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Year |
2021 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
15805 |
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Keywords |
Fisheries Marine biology Physical oceanography |
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Abstract |
Oceanic frontal zones have been shown to deeply influence the distribution of primary producers and, at the other extreme of the trophic web, top predators. However, the relationship between these structures and intermediate trophic levels is much more obscure. In this paper we address this knowledge gap by comparing acoustic measurements of mesopelagic fish concentrations to satellite-derived fine-scale Lagrangian Coherent Structures in the Indian sector of the Southern Ocean. First, we demonstrate that higher fish concentrations occur more frequently in correspondence with strong Lagrangian Coherent Structures. Secondly, we illustrate that, while increased fish densities are more likely to be observed over these structures, the presence of a fine-scale feature does not imply a concomitant fish accumulation, as other factors affect fish distribution. Thirdly, we show that, when only chlorophyll-rich waters are considered, front intensity modulates significantly more the local fish concentration. Finally, we discuss a model representing fish movement along Lagrangian features, specifically built for mid-trophic levels. Its results, obtained with realistic parameters, are qualitatively consistent with the observations and the spatio-temporal scales analysed. Overall, these findings may help to integrate intermediate trophic levels in trophic models, which can ultimately support management and conservation policies. |
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109 |
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ISSN |
2045-2322 |
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yes |
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Call Number |
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Serial |
8384 |
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Title |
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago |
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Journal |
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Year |
2021 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
11917 |
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Keywords |
Animal migration Behavioural ecology Ecology Stable isotope analysis |
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Programme |
1041 |
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ISSN |
2045-2322 |
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2045-2322 |
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yes |
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Call Number |
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Serial |
8180 |
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