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How do cephalopods become available to seabirds: can fish gut contents from tuna fishing vessels be a major food source of deep-dwelling cephalopods?

1 January, 2013

Cephalopods are important prey for numerous seabird species. However, the physical mechanisms by which cephalopods (particularly species considered as deep-dwelling) become available to seabirds are poorly understood, and it has…

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Higher precision estimates of regional polar warming by ensemble regression of climate model projections

19 December, 2012 by Thomas Bracegirdle

This study presents projections of twenty-first century wintertime surface temperature changes over the high-latitude regions based on the third Coupled Model Inter-comparison Project (CMIP3) multi-model ensemble. The state-dependence of the…

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The effect of energetic electron precipitation on middle mesospheric night-time ozone during and after a moderate geomagnetic storm

19 December, 2012 by David Newnham

Using a ground-based microwave radiometer at Troll Station, Antarctica (72°S, 2.5°E, L = 4.76), we have observed a decrease of 20–70% in the mesospheric ozone, coincident with increased nitric oxide,…

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Dietary variation in chick-feeding and self-provisioning Cape Petrel Daption capense and Snow Petrel Pagodroma nivea at Signy Island, South Orkney Islands, Antarctica

17 December, 2012 by Philip Trathan

Food web knowledge is a prerequisite for adequate resource management in the Antarctic ecosystem. Accurate dietary specifications for the major consumers within the Antarctic ecosystem are needed. Procellariid species are…

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Southern Weddell Sea shelf edge geomorphology: Implications for gully formation by the overflow of high-salinity water

1 December, 2012 by Deb Shoosmith, Claus-Dieter Hillenbrand, Robert Larter

Submarine gullies are the most common morphological features observed on Antarctic continental slopes. The processes forming these gullies, however, remain poorly constrained. In some areas, gully heads incise the continental…

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Representation of the Antarctic Circumpolar Current in the CMIP5 climate models and future changes under warming scenarios

1 December, 2012 by Andrew Meijers, Emily Shuckburgh, Jean-Baptiste Sallee, Thomas Bracegirdle

The representation of the Antarctic Circumpolar Current (ACC) in the fifth Coupled Models Intercomparison Project (CMIP5) is generally improved over CMIP3. The range of modeled transports in the historical (1976–2006)…

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A compilation of parameters for a krill-fishery predator model of the Scotia Sea and Antarctic Peninsula (working paper version)

2 April, 2012 by Sally Thorpe, Simeon Hill

We describe the compilation and derivation of parameters for use in krill-fishery-predator models of the Scotia Sea – Antarctic Peninsula region. The primary aim is to provide input for the…

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Combined THEMIS and ground-based observations of a pair of substorm-associated electron precipitation events

1 February, 2012 by Mark Clilverd, Neil Cobbett

Using ground-based subionospheric radio wave propagation data from two very low frequency (VLF) receiver sites, riometer absorption data, and THEMIS satellite observations, we examine in detail energetic electron precipitation (EEP)…

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