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Showing 1 to 11 of 11 for “"Scotia Sea"”.
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Modelling plate kinematics in the Scotia sea
A new model of plate kinematics in the Scotia Sea region is presented in which continental crustal blocks and the signatures of seafloor spreading are defined semi-automatically using gravity and total field magnetic anomalies and some of their residuals, transformations and derivatives. This study …
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Modeling Studies of Antarctic Krill (<i>Euphausia superba</i>) Survival During Transport Across the Scotia Sea and Environs
… at South Georgia, which is in the eastern Scotia Sea, are hypothesized to be sustained by import of individuals from upstream regions, such as the western Antarctic Peninsula. To test this hypothesis a modeling framework consisting of the Harvard Ocean Prediction System (HOPS) and a …
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Iron biogeochemistry in (sub-) Polar waters
… the high<br/>latitude North Atlantic and the Scotia Sea in the Southern Ocean. The mechanisms of iron<br/>supply and the biological response of resident phytoplankton communities to iron were<br/>addressed in both study areas. Two cruises to the high latitude North Atlantic Ocean (>55 …
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Concentration and isotopic composition of marine nitrous oxide, in particular the oxygen-17 isotope excess
… subtropical and tropical Atlantic Ocean, the Scotia Sea and the Weddell Sea. This indicates a biological source for oxygen isotope excess in N2O, as oceanic N2O was not in equilibrium with the atmosphere (0.9 ‰). δ(15N) values ranged from 2.3 to 25.1 ‰ (relative to Air-N2). δ(18O) measured in …
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Ice-rafted debris in the Southern Ocean : potential uses and limitations of ²³⁰Th-normalized fluxes
… from 22-5 ka BP in two sediment cores from the Scotia Sea using two different methods. The first, commonly used method, uses the linear sedimentation rate (LSR), dry bulk density, and weight percent of IRD in the sample. The second uses ²³⁰ThTh normalization, which has been proposed as an …
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Emiliania huxleyi and climate change: a genetic and biogeographic investigation of bloom dynamics for a key phytoplankton species in the global carbon cycle
… variables during two successive cruises to the Scotia Sea. Multivariate statistical analyses were used to identify the most influential environmental variables controlling mineralizing nannoplankton biogeography. Sea surface temperature (SST) and salinity were identified as primary variables and …
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The Evolution and Impact of Weddell Sea Deep Water
… Sheet is largely marine based and grounded below sea level, which makes it especially vulnerable for sea-level forcing and ocean warming. In turn, the Southern Ocean overturning circulation is partially driven by deep water formation along the Antarctic continent, which is strongly modulated by …
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Trace metal effects on phytoplankton in subpolar seas with special emphasis on coccolithophores
… and the Southern Ocean (Great Calcite Belt, Scotia Sea). The response of coccolithophores to environmental conditions was investigated by examining distribution patterns in situ and in targeted bioassays where natural communities were incubated with elevated levels of trace metal …
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Provenance of Eastern Magallanes Foreland Basin Sediments: Mineralogical and Geochemical Analyses Reveal Paleogene Tectonic Unroofing of the Fuegian andes
… the Cenozoic by forming the Drake Passage in the Scotia Sea. Heavy mineral composition data from the eastern Magallanes basin of southernmost South America indicate that Campanian to middle Eocene sediments had a mafic/ophiolitic provenance which is interpreted as being derived from the …