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The summertime plankton community at South Georgia (Southern Ocean): comparing the historical (1926/27) and modern (post 1995) records.

1 January, 2008 by Michael Meredith, Peter Ward

The earliest comprehensive plankton sampling programme in the Southern Ocean was 32 undertaken during the early part of last century by Discovery Investigations to gain a 33 greater scientific understanding…

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The interpretation of spikes and trends in concentration of nitrate in polar ice cores, based on evidence from snow and atmospheric measurements

1 January, 2008 by Anna Jones, Eric Wolff

Nitrate is frequently measured in ice cores, but its interpretation remains immature. Using daily snow surface concentrations of nitrate at Halley (Antarctica) for 2004 - 2005, we show that sharp…

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Mapping ionospheric backscatter measured by the SuperDARN HF radars – Part 2: Assessing SuperDARN virtual height models

1 January, 2008 by Gareth Chisham

The Super Dual Auroral Radar Network (SuperDARN) network of HF coherent backscatter radars form a unique global diagnostic of large-scale ionospheric and magnetospheric dynamics in the northern and southern hemispheres.…

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RRS James Clark Ross Cruise 139, 05 Dec-12 Dec 2005. Drake Passage Repeat Hydrography: WOCE Southern Repeat Section 1b – Burdwood Bank to Elephant Island

1 January, 2008 by Michael Meredith

This report describes the eleventh occupation of the Drake Passage section, established during the World Ocean Circulation Experiment as repeat section SR1b. It was first occupied by Southampton Oceanography Centre…

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Radio echo sounding of Pine Island Glacier, West Antarctica: Aperture synthesis processing and analysis of feasibility from space

1 August, 2007 by David Vaughan, Hugh Corr

Airborne radio echo sounding of the West Antarctic Ice Sheet over Pine Island Glacier was performed in the austral summer of 2004/2005 under the National Science Foundation's West Antarctic Ice…

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Glacial/interglacial changes in mineral dust and sea-salt records in polar ice cores: sources, transport, and deposition

24 February, 2007 by Eric Wolff

Sea salt and mineral dust records as represented by Na+ and Ca2+ concentrations, respectively, in Greenland and Antarctic ice cores show pronounced glacial/interglacial variations. For the Last Glacial Maximum (LGM)…

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Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: investigating the roles of ocean and sea ice transport

1 February, 2007 by Eugene Murphy, Jonathan Watkins, Sally Thorpe

Antarctic krill, Euphausia superba Dana, has a heterogeneous circumpolar distribution in the Southern Ocean. Krill have a close association with sea ice which provides access to a critical food source…

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The Italian-British Antarctic geophysical and geological survey in northern Victoria Land 2005-06 – towards the International Polar Year 2007-08

1 January, 2007 by Fausto Ferraccioli

During the summer season 2005-06 a major scientific collaboration between the British Antarctic Survey (BAS) and the Italian Programma Nazionale di Ricerche in Antartide (PNRA) carried out airborne geophysical investigations…

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Aeromagnetic anomaly patterns reveal buried faults along the eastern margin of the Wilkes Subglacial Basin (East Antarctica)

1 January, 2007 by Fausto Ferraccioli

The Wilkes Subglacial Basin (WSB) is the major morphological feature recognized in the hinterland of the Transantarctic Mountains. The origin of this basin remains contentious and relatively poorly understood due…

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Are Antarctic Peninsula Ice Sheet grounding events manifest in sedimentary cycles on the adjacent continental rise?

1 January, 2007 by Claus-Dieter Hillenbrand

The direct record of Late Miocene–Early Pliocene Antarctic Peninsula Ice Sheet expansions from a previously published seismostratigraphic study of the outer shelf at Ocean Drilling Program Site 1097 is compared…

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Application of liposome and stable isotope tracer techniques to study polyunsaturated fatty acid biosynthesis in marine zooplankton

1 January, 2007

We investigated the ability of four species of marine zooplankton to synthesize polyunsaturated fatty acids (PUFAs) during pulse-chase tracer experiments. Liposomes containing a deuterium labelled precursor fatty acid, D5-18:3n-3, were…

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Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams

1 January, 2007

Subglacial bed conditions exert a significant control on ice stream behavior and evolution, and can be characterized by determining bed roughness from FFT analysis of radar-imaged basal reflectors. Here we…

Read more on Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams

Variations in behaviour and condition of a Southern Ocean top predator in relation to in situ oceanographic conditions

1 January, 2007 by Michael Meredith, Sally Thorpe

Responses by marine top predators to environmental variability have previously been almost impossible to observe directly. Using novel, animal-mounted instruments simultaneously recording movements, diving behaviour and in-situ oceanographic properties, we…

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Climate change effects on organic matter decomposition rates in ecosystems from the Maritime Antarctic and Falkland Islands

1 January, 2007 by Peter Convey

Antarctic terrestrial ecosystems have poorly developed soils and currently experience one of the greatest rates of climate warming on the globe. We investigated the responsiveness of organic matter decomposition in…

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The effect of environmental change on vascular plant and cryptogam communities from the Falkland Islands and the Maritime Antarctic

1 January, 2007 by Peter Convey

Background: Antarctic terrestrial vegetation is subject to one of the most extreme climates on Earth. Currently, parts of Antarctica are one of the fastest warming regions on the planet. During…

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Energetic cost of synthesizing proteins in Antarctic limpet, Nacella concinna (Strebel, 1908), is not temperature dependent

1 January, 2007 by Andrew Clarke, Lloyd Peck

The energetic cost of protein synthesis is thought to account for a significant proportion of total metabolism. However, attempts to estimate the energetic cost of synthesizing proteins have resulted in…

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Life in the fast lane: The free-ranging activity, heart rate and metabolism of an Antarctic fish tracked in temperate waters

1 January, 2007 by Lloyd Peck

The fish species Notothenia angustata inhabits temperate waters (10 °C), yet retains physiological traits that show it once existed at sub-zero temperatures. We determined the free-ranging activity, heart rate and…

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