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Author
Title Type Journal
Year (down) 2022 Publication Marine Ecology Progress Series Abbreviated Journal
Volume 697 Issue Pages 149-165
Keywords Activity pattern At-sea distribution Bill width Geolocation GPS Pachyptila macgillivrayi Seabirds Southern Indian Ocean Trophic position
Abstract
Programme 109,394
Campaign
Address
Corporate Author Thesis Bachelor's thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0171-8630, 1616-1599 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8564
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Author
Title Contrasting bottom-up effects of warming ocean on two king penguin populations Type Journal
Year (down) 2022 Publication Global Change Biology Abbreviated Journal
Volume 29 Issue 4 Pages 998-1008
Keywords breeding success climate change king penguin marine ecosystem ocean temperature Southern Ocean
Abstract
Programme 394
Campaign
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1365-2486 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8566
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Author Yves Cherel, Karine Delord, Christophe Barbraud, Henri Weimerskirch
Title Diet, isotopic niche, and spatial distribution of the white-headed petrel (Pterodroma lessonii) at Kerguelen Islands Type Journal
Year (down) 2022 Publication Polar Biology Abbreviated Journal
Volume 45 Issue 11 Pages 1607-1621
Keywords Fish Food Myctophidae Procellariiformes Seabirds Southern ocean Squid
Abstract
Programme 109
Campaign
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1432-2056 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8567
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Author V. Haberle, A. Marchaudon, A. Chambodut, P.-L. Blelly
Title Direct Determination of Geomagnetic Baselines During Quiet Periods for Low- and Mid-Latitude Observatories Type Journal
Year (down) 2022 Publication Journal of Geophysical Research: Space Physics Abbreviated Journal
Volume 127 Issue 8 Pages e2022JA030407
Keywords magnetic baseline magnetic observatory data quiet geomagnetic field Sq current
Abstract The geomagnetic field is composed of a variety of sources that act on a wide range of timescales and amplitudes. The separation of magnetic storm effects from quiet variations is needed to accurately quantify impacts of space weather events. The extraction of such quiet contributions within geomagnetic measurements is achieved by the determination of baselines, which, ideally, is done by a simple algorithm which captures quiet sources suitably well, while being applicable to an extensive network of magnetic observatories independent of the period of time. In this work, we apply signal filtering techniques on the horizontal components of geomagnetic field measurements from low- and mid-latitude observatories to determine baselines. The variations within the baseline are investigated for magnetically quiet periods between 1991 and 2019, focusing on long-term trends, seasonal and local time dependencies, and day-to-day variability. The analysis confirms that the contributing quiet sources include the secular variation and the solar quiet (Sq) current system. The non-negligible day-to-day variability, that is typical for Sq in low- and mid-latitudes, is embedded within the baseline. Thus, the filter approach extracts quiet magnetic field variations well. Comparisons with other baseline methods show good agreements. We conclude that the filter approach can be used to determine baselines automatically during magnetically quiet periods without the need of further apriori information and is applicable on a wide network of magnetic observatories. It marks the first step for deriving magnetic indices for (near) real-time space weather applications.
Programme 139
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2169-9402 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8568
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Author
Title Every hooked beak is maintained by a prey: Ecological signal in cephalopod beak shape Type Journal
Year (down) 2022 Publication Functional Ecology Abbreviated Journal
Volume 36 Issue 8 Pages 2015-2028
Keywords 3D geometric morphometrics beak cephalopod ecology phylogenetic signal
Abstract Beaks are among the few hard parts of coleoid cephalopods and are informative for species identification. Although mandible shape has been shown to be adaptive in many vertebrate taxa, it has been suggested that the shape of coleoid beaks does not bear any ecological signal. Yet, previous studies only explored beak shape in 2D and none have provided an in-depth investigation of the potential relationship with ecological variables such as habitat use or diet. The goal of the present study was to understand whether variation in cephalopod beak shape reflects ecology and/or is more driven by phylogenetic relatedness as suggested previously. We imaged 101 lower and 108 upper beaks in 3D using underwater photogrammetry and micro-CT scanning. Our 3D morphometric analysis conducted on 75 species of cephalopod shows that there is a significant but moderate phylogenetic signal. However, comparative phylogenetically informed analyses demonstrate that beak shape is also driven by ecology. We detected significant differences in beak shape between species inhabiting different habitats (pelagic, benthic or demersal) and of different trophic levels. Our results further suggest that beak shape variation can be summarized along a continuum between two main functions: fast closing versus hard biting. These results provide novel insights into the drivers of beak shape diversity in coleoid cephalopods and suggest that beak shape has evolved adaptively in relation to diet and habitat use. Read the free Plain Language Summary for this article on the Journal blog.
Programme 109
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1365-2435 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8569
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Author
Title Fisheries bycatch mitigation measures as an efficient tool for the conservation of seabird populations Type Journal
Year (down) 2022 Publication Journal of Applied Ecology Abbreviated Journal
Volume 59 Issue 7 Pages 1674-1685
Keywords
Abstract
Programme 109
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1365-2664 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8570
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Author Ivan D. Haigh, Marta Marcos, Stefan A. Talke, Philip L. Woodworth, John R. Hunter, Ben S. Hague, Arne Arns, Elizabeth Bradshaw, Philip Thompson
Title GESLA Version 3: A major update to the global higher-frequency sea-level dataset Type Journal
Year (down) 2022 Publication Geoscience Data Journal Abbreviated Journal
Volume 10 Issue 3 Pages 293-314
Keywords sea level records sea level rise storm surges storm tides tide gauge
Abstract This paper describes a major update to the quasi-global, higher-frequency sea-level dataset known as GESLA (Global Extreme Sea Level Analysis). Versions 1 (released 2009) and 2 (released 2016) of the dataset have been used in many published studies, across a wide range of oceanographic and coastal engineering-related investigations concerned with evaluating tides, storm surges, extreme sea levels, and other related processes. The third version of the dataset (released 2021), presented here, contains double the number of years of data, and nearly four times the number of records, compared to Version 2. The dataset consists of records obtained from multiple sources around the world. This paper describes the assembly of the dataset, its processing, and its format, and outlines potential future improvements.
Programme 688
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Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2049-6060 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8571
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Author Kristin N. Barton, Nairita Pal, Steven R. Brus, Mark R. Petersen, Brian K. Arbic, Darren Engwirda, Andrew F. Roberts, Joannes J. Westerink, Damrongsak Wirasaet, Michael Schindelegger
Title Global Barotropic Tide Modeling Using Inline Self-Attraction and Loading in MPAS-Ocean Type Journal
Year (down) 2022 Publication Journal of Advances in Modeling Earth Systems Abbreviated Journal
Volume 14 Issue 11 Pages e2022MS003207
Keywords barotropic tides E3SM MPAS-Ocean numerical ocean modeling self-attraction and loading surface tides
Abstract We examine ocean tides in the barotropic version of the Model for Prediction Across Scales (MPAS-Ocean), the ocean component of the Department of Energy Earth system model. We focus on four factors that affect tidal accuracy: self-attraction and loading (SAL), model resolution, details of the underlying bathymetry, and parameterized topographic wave drag. The SAL term accounts for the tidal loading of Earth's crust and the self-gravitation of the ocean and the load-deformed Earth. A common method for calculating SAL is to decompose mass anomalies into their spherical harmonic constituents. Here, we compare a scalar SAL approximation versus an inline SAL using a fast spherical harmonic transform package. Wave drag accounts for energy lost by breaking internal tides that are produced by barotropic tidal flow over topographic features. We compare a series of successively finer quasi-uniform resolution meshes (62.9, 31.5, 15.7, and 7.87 km) to a variable resolution (45 to 5 km) configuration. We ran MPAS-Ocean in a single-layer barotropic mode forced by five tidal constituents. The 45 to 5 km variable resolution mesh obtained the best total root-mean-square error (5.4 cm) for the deep ocean (1,000 m) tide compared to TPXO8 and ran twice as fast as the quasi-uniform 8 km mesh, which had an error of 5.8 cm. This error is comparable to those found in other forward (non-assimilative) ocean tide models. In future work, we plan to use MPAS-Ocean to study tidal interactions with other Earth system components, and the tidal response to climate change.
Programme 688
Campaign
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1942-2466 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8572
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Author Lucas Sawade, Stephen Beller, Wenjie Lei, Jeroen Tromp
Title Global centroid moment tensor solutions in a heterogeneous earth: the CMT3D catalogue Type Journal
Year (down) 2022 Publication Geophysical Journal International Abbreviated Journal
Volume 231 Issue 3 Pages 1727-1738
Keywords
Abstract
Programme 133
Campaign
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0956-540X ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8573
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Author
Title Images of the East African Rift System by Global Adaptive-Resolution Surface-Wave Tomography Type Journal
Year (down) 2022 Publication Journal of Geophysical Research: Solid Earth Abbreviated Journal
Volume 127 Issue 6 Pages e2021JB023570
Keywords East African Rift System surface-wave velocity model
Abstract In this study we map the entire East African Rift System (EARS) within a global surface-wave velocity model to better constrain the structure of the underlying mantle, as well as patterns that might be associated with its continuation in the Mozambique Channel. We use all publicly available seismograms from the African continent, amounting to 1296 stations and more than 30 years of recordings. From these data, we obtain dispersion curves using both ambient noise and teleseismic earthquakes. To our measurements, we add global counterparts and jointly invert them for phase-velocity maps. We exploit a linearized inversion based on the ray theory, with an adaptive parameterization that allows for maximizing the resolution of the final maps based on the density of data coverage. We thus image the main African cratons and also some of the Archean blocks within them. We highlight the discontinuous nature of magmatic activity along the EARS and also display low-velocity anomalies beneath the Comores Archipelago, Madagascar and Bassas da India volcanic islands and seamounts. This last low-velocity anomaly is in the direct continuation of the EARS and could unveil an important magmatic system in the Mozambique Channel.
Programme 133
Campaign
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2169-9356 ISBN Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 8574
Permanent link to this record