Publications

12133 to 12144 of 14082 results

1. Potential seaways across West Antarctica

   The West Antarctic ice sheet (WAIS) has long been considered vulnerable to rapid retreat and today parts are rapidly losing ice. Projection of future change in WAIS is, however, hampered […]

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2. Contemporary and historical separation of transequatorial migration between genetically distinct seabird populations

   Pelagic seabirds are highly mobile, reducing the likelihood of allopatric speciation where disruption of gene flow between populations is caused by physically insurmountable, extrinsic barriers. Spatial segregation during the non-breeding […]

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3. Holocene stability of the Amundsen-Weddell ice divide, West Antarctica

   We analyze Holocene ice flow using global positioning system and radio-echo sounding data acquired near the Amundsen-Weddell ice divide, between Pine Island Glacier and the Institute Ice Stream, West Antarctica. […]

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4. Phase transitions of wax esters adjust buoyancy in diapausing Calanoides acutus

   We study the composition and biophysical properties of wax esters extracted from the Antarctic copepod, Calanoides acutus, to explore if these factors adjust buoyancy in diapausing copepods. Levels of wax […]

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5. Seabed foraging by Antarctic krill: Implications for stock assessment, bentho-pelagic coupling, and the vertical transfer of iron

   A compilation of more than 30 studies shows that adult Antarctic krill (Euphausia superba) may frequent benthic habitats year-round, in shelf as well as oceanic waters and throughout their circumpolar […]

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6. Crenarchaea and phytoplankton coupling in sedimentary archives: Common trigger or metabolic dependence?

   The concentrations of chlorins (chlorophyll transformation products indicative of phytoplankton production) and crenarchaeol (a marker for Crenarchaea abundance) are significantly positively correlated (Spearman’s rank correlation coefficient r(s) > 0.75) in […]

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7. The multi-seasonal NOy budget in coastal Antarctica and its link with surface snow and ice core nitrate: results from the CHABLIS campaign

   Measurements of a suite of individual NOy components were carried out at Halley station in coastal Antarctica as part of the CHABLIS campaign (Chemistry of the Antarctic Boundary Layer and […]

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8. Nitric acid enhancements in the mesosphere during the January 2005 and December 2006 solar proton events

   We investigate enhancements of mesospheric nitric acid (HNO(3)) in the Northern Hemisphere polar night regions during the January 2005 and December 2006 solar proton events (SPEs). The enhancements are caused […]

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9. Lea protein expression during cold-induced dehydration in the Arctic Collembola Megaphorura arctica

   The Arctic springtail Megaphorura arctica (Tullberg, 1876) employs a strategy known as cryoprotective dehydration to survive winter temperatures as low as -25 degrees C. During cryoprotective dehydration, water is lost […]

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10. South polar skuas from a single breeding population overwinter in different oceans though show similar migration patterns

    Seabirds in seasonal environments are often long-distance migrants and, for many species and populations, their ranges throughout the non-breeding period are unknown. As conditions during the non-breeding season often affect […]

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11. Till genesis at the bed of an Antarctic Peninsula palaeo-ice stream as indicated by micromorphological analysis

    Sediment cores from cross-shelf troughs on the NE Antarctic Peninsula shelf recovered tills with variable shear strengths that represent different subglacial depositional regimes. In addition to detailed qualitative micromorphological descriptions, […]

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12. Streaming flow of an Antarctic Peninsula palaeo-ice stream, both by basal sliding and deformation of substrate

    Acoustic sub-bottom profiler surveys on the northeast Antarctic Peninsula shelf indicate that parts of the seabed are underlain by an acoustically transparent layer that is thin on the inner shelf […]

    Read more of: Streaming flow of an Antarctic Peninsula palaeo-ice stream, both by basal sliding and deformation of substrate