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Mycorrhizas and dark septate root endophytes in polar regions
1 January, 2009 by Kevin Newsham
We review the distributions and functions of mycorrhizas and dark septate root endophytes in polar regions. Arbuscular mycorrhizas (AM) are present in the Arctic and Antarctic to 82 ºN and…Read more on Mycorrhizas and dark septate root endophytes in polar regions
Responses of plants in polar regions to UVB exposure: a meta-analysis
1 January, 2009 by Kevin Newsham
We report a meta-analysis of data from 34 field studies into the effects of ultraviolet B (UVB) radiation on Arctic and Antarctic bryophytes and angiosperms. The studies measured plant responses…Read more on Responses of plants in polar regions to UVB exposure: a meta-analysis
Ice-ocean processes over the continental shelf of the southern Weddell Sea, Antarctica: a review
1 January, 2009 by Keith Makinson, Keith Nicholls
Interactions between the Southern Ocean and the Weddell Sea ice shelves are important both to the Antarctic Ice Sheet and to the production of globally significant water masses. Here we…Climatology of short-period mesospheric gravity waves over Halley, Antarctica (76 S, 27 W)
1 January, 2009
We present a first detailed climatological study of individual quasi-monochromatic mesospheric, shortperiod gravity-wave events observed over Antarctica. The measurements were made using an all-sky airglow imager located at Halley Station…Emission of methane from plants
1 January, 2009 by Emily Shuckburgh
It has been proposed that plants are capable of producing methane by a novel and unidentified biochemical pathway. Emission of methane with an apparently biological origin was recorded from both…Morphology of the upper continental slope in the Bellingshausen and Amundsen Seas – implications for sedimentary processes at the shelf edge of West Antarctica
1 January, 2009 by Robert Larter
Swath bathymetric and sub-bottom profiler data reveal a variety of submarine landforms such as gullies, slide scars, subtle shelf edge-parallel ridges and elongated depressions, and small debris flows along the…Frost flower surface area and chemistry as a function of salinity and temperature
1 January, 2009 by Eric Wolff, Howard Roscoe
Frost flowers play a role in air-ice exchange in polar regions, contribute to tropospheric halogen chemistry, and affect ice core interpretation. Frost flowers were observed and collected on the Hudson…Read more on Frost flower surface area and chemistry as a function of salinity and temperature
The tectonic context of the Early Palaeozoic southern margin of Gondwana
1 January, 2009
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one…Read more on The tectonic context of the Early Palaeozoic southern margin of Gondwana
Current status of the Antarctic herb tundra formation in the central Argentine Islands
1 January, 2009 by Peter Convey
Changes in the higher plant populations of the Argentine Islands over the last four to five decades have been central to developing an understanding of the likely biological responses to…Read more on Current status of the Antarctic herb tundra formation in the central Argentine Islands
Antarctic subglacial lake exploration: a new frontier in microbial ecology
1 January, 2009 by David Pearce
To date, wherever life has been sought on Earth, it has almost always been found—from high in the stratosphere (Imshenetskii et al., 1975, 1978, 1986; Wainwright et al., 2003) to…Read more on Antarctic subglacial lake exploration: a new frontier in microbial ecology
Microorganisms in the atmosphere over Antarctica
1 January, 2009 by David Pearce, Kevin Hughes
Antarctic microbial biodiversity is the result of a balance between evolution, extinction and colonization, and so it is not possible to gain a full understanding of the microbial biodiversity of…Read more on Microorganisms in the atmosphere over Antarctica
Animal temperature limits and ecological relevance: effects of size, activity and rates of change
1 January, 2009 by Ali Massey, Lloyd Peck, Melody Clark, Simon Morley
1. Climate change is affecting species distributions and will increasingly do so. However, current understanding of which individuals and species are most likely to survive and why is poor. Knowledge…Lack of acclimation in Ophionotus victoriae: brittle stars are not fish
1 January, 2009 by Ali Massey, Lloyd Peck, Michael Thorne, Melody Clark
Acclimation is possibly the most important criterion deciding an animal's ability to survive change. Species with poor abilities to acclimate to small environmental change are likely to be the most…Read more on Lack of acclimation in Ophionotus victoriae: brittle stars are not fish
Stable isotopes reveal individual variation in migration strategies and habitat preferences in a suite of seabirds during the nonbreeding period
1 January, 2009 by Richard Phillips
Information on predator and prey distributions is integral to our understanding of migratory connectivity, food web dynamics and ecosystem structure. In marine systems, although large animals that return to land…Albatross foraging behaviour: no evidence for dual foraging, and limited support for anticipatory regulation of provisioning at South Georgia
1 January, 2009 by Richard Phillips
Many pelagic seabirds are thought to regulate reproductive effort by adopting a dual foraging strategy, alternating or mixing short foraging trips over local shelf waters (maximising provisioning rates) with longer…Southern Ocean deep-water carbon export enhanced by natural iron fertilization
1 January, 2009 by Hugh Venables, Sophie Fielding
The addition of iron to high- nutrient, low- chlorophyll regions induces phytoplankton blooms that take up carbon(1-3). Carbon export from the surface layer and, in particular, the ability of the…Read more on Southern Ocean deep-water carbon export enhanced by natural iron fertilization
Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets
1 January, 2009 by David Vaughan, Hamish Pritchard, Robert Arthern
Many glaciers along the margins of the Greenland and Antarctic ice sheets are accelerating and, for this reason, contribute increasingly to global sea-level rise(1-7). Globally, ice losses contribute similar to…Read more on Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets
Circum-Antarctic age modelling of Quaternary marine cores under the Antarctic Circumpolar Current: ice-core dust-magnetic correlation
1 January, 2009 by Claus-Dieter Hillenbrand
Sediments in the belt under the Antarctic Circumpolar Current (ACC) contain high quantities of siliceous microfossils (mainly diatoms) and very little to zero carbonate. This prevents establishment of the age…Flight morphology and foraging behaviour of male and female Cory’s shearwaters
1 January, 2009 by Richard Phillips
In some seabirds sexually dimorphic in size, males and females segregate at sea or diverge in other aspects of foraging behavior. We examined factors influencing foraging strategies of Cory's Shearwater…Read more on Flight morphology and foraging behaviour of male and female Cory’s shearwaters
Impacts of the oceans on climate change
1 January, 2009 by Michael Meredith, Zhaomin Wang
The oceans play a key role in climate regulation especially in part buffering (neutralising) the effects of increasing levels of greenhouse gases in the atmosphere and rising global temperatures. This…Contrasting sources for glacial and interglacial shelf sediments used to interpret changing ice flow directions in the Larsen Basin, northern Antarctic Peninsula
1 January, 2009 by Claus-Dieter Hillenbrand
Marine sediment cores from the former Larsen A Ice Shelf area reveal three lithological units deposited during ice sheet advance and retreat from the continental shelf. The uppermost Unit 1…Validation of three global ocean models in the Weddell Sea
1 January, 2009 by Angelika Renner, Sally Thorpe
We present a validation of three global z-level eddy-permitting/resolving ocean general circulation models against hydrographic observations and remote sensing sea ice data from the Weddell Sea. The Weddell Sea is…Read more on Validation of three global ocean models in the Weddell Sea
The geochemistry of Middle Jurassic dykes associated with the Straumsvola-Tvora alkaline plutons, Dronning Maud Land, Antarctica and their association with the Karoo large igneous province
1 January, 2009 by Philip Leat, Teal Riley
Jurassic dykes of western Dronning Maud Land (Antarctica) form a minor component of the Karoo large igneous province. An extensive local dyke swarm intrudes Neoproterozoic gneisses and Jurassic syenite plutons…Vegetation cover regulates the quantity, quality and temporal dynamics of dissolved organic carbon and nitrogen in Antarctic soils
1 January, 2009 by Kevin Newsham
Populations of the two native Antarctic vascular plant species (Deschampsia antarctica and Colobanthus quitensis) have expanded rapidly in recent decades, yet little is known about the effects of these expansions…Holocene relative sea-level change and deglaciation on Alexander Island, Antarctic Peninsula, from elevated lake deltas
1 January, 2009 by Dominic Hodgson, James Smith, Stephen Roberts
Field data constraining the rate and spatial pattern of deglaciation and relative sea-level (RSL) change on the Antarctic Peninsula (AP) are relatively sparse, but are needed to improve regional ice…Geolocators map the wintering grounds of threatened Lesser Kestrels in Africa
1 January, 2009 by Vsevolod Afanasyev
Aim To identify the wintering grounds of the threatened western European Lesser Kestrels to focus conservation efforts in those areas. Location Huelva Province, southern Spain, as breeding range, and western…Read more on Geolocators map the wintering grounds of threatened Lesser Kestrels in Africa
Effects of geolocator attachments on breeding parameters of Lesser Kestrels
1 January, 2009 by Vsevolod Afanasyev
Light level geolocators, also known as GLS loggers, are electronic devices intended for tracking the location of wide-ranging animals using ambient light to estimate latitude and longitude. Miniaturized geolocators that…Read more on Effects of geolocator attachments on breeding parameters of Lesser Kestrels
Seasonal changes in basal conditions at Briksdalsbreen, Norway: the winter-spring transition
1 January, 2009
The winter-spring transition is a dynamic time within the glacier system, because it marks a period of instability as the glacier undergoes a change in state from winter to summer.…Quantitative relationships between benthic diatom assemblages and water chemistry in Macquarie Island lakes and their potential for reconstructing past environmental changes
1 January, 2009 by Dominic Hodgson
This study is the first published survey of diatom-environment relationships Oil sub-Antarctic Macquarie Island. Fifty-eight sites in 50 coastal and inland lakes were sampled for benthic diatoms and water chemistry.…A new method for high-resolution methane measurements on polar ice cores using continuous flow analysis
1 January, 2009
Methane (CH4) is the second most important anthropogenic greenhouse gas in the atmosphere. Rapid variations of the CH4 concentration, as frequently registered, for example during the last ice age, have…Growth, dynamics and deglaciation of the last British-Irish ice sheet: the deep-sea ice-rafted detritus record
1 January, 2009 by Victoria Peck
The evolution and dynamics of the last British-Irish Ice Sheet (BIIS) have hitherto largely been reconstructed from onshore and shallow marine glacial geological and geomorphological data. This reconstruction has been…The role of eddies in the Southern Ocean temperature response to the Southern Annular Mode
1 January, 2009 by Gareth Marshall, Howard Roscoe
The role of eddies in modulating the Southern Ocean response to the southern annular mode (SAM) is examined, using an ocean model run at multiple resolutions from coarse to eddy…Effects of simulated light regimes on gene expression in Antarctic krill (Euphausia superba Dana)
1 January, 2009 by Geraint Tarling, Michael Thorne, Melody Clark
A change in photoperiod has been implicated in triggering a transition from an active to a quiescent state in Antarctic krill. We examined this process at the molecular level, to…Geomagnetic activity and polar surface air temperature variability
1 January, 2009 by Mark Clilverd
Here we use the ERA-40 and ECMWF operational surface level air temperature data sets from 1957 to 2006 to examine polar temperature variations during years with different levels of geomagnetic…Read more on Geomagnetic activity and polar surface air temperature variability
Feeding ecology of myctophid fishes in the northern Scotia Sea
1 January, 2009 by Geraint Tarling, Martin Collins, Nadine Johnston, Peter Ward
The diets of 9 species of myctophid fishes, Electrona carlsbergi, E. antarctica, Gymnoscopelus fraseri, G. nicholsi, G. braueri, Protomyctophum bolini, P. choriodon, Krefftichthys anderssoni and Nannobrachium achirus, were investigated during…Read more on Feeding ecology of myctophid fishes in the northern Scotia Sea
Local mixing events in the upper troposphere and lower stratosphere. Part II: seasonal and interannual variability
1 January, 2009 by Emily Shuckburgh
The Lyapunov diffusivity is used to investigate local isentropic mixing events in the upper troposphere lower stratosphere (UTLS) region. The diagnostic highlights the seasonal cycle of the longitudinally varying mixing…Robustness of an effective diffusivity diagnostic in oceanic flows
1 January, 2009 by Emily Shuckburgh
The robustness of Nakamura's effective diffusivity diagnostic for quantifying eddy diffusivities of tracers within a streamwise-average framework is carefully examined in an oceanographic context, and the limits of its applicability…Read more on Robustness of an effective diffusivity diagnostic in oceanic flows
Understanding the regional variability of eddy diffusivity in the Pacific sector of the Southern Ocean
1 January, 2009 by Emily Shuckburgh
A diagnostic framework is presented, based on the Nakamura effective diffusivity, to investigate the regional variation in eddy diffusivity. Comparison of three different diffusivity calculations enables the effects of locally…Evidence for warmer interglacials in East Antarctic ice cores
1 January, 2009 by Eric Wolff, Louise Sime
table isotope ratios of oxygen and hydrogen in the Antarctic ice core record have revolutionized our understanding of Pleistocene climate variations and have allowed reconstructions of Antarctic temperature over the…Read more on Evidence for warmer interglacials in East Antarctic ice cores
Interpreting temperature information from ice cores along the Antarctic Peninsula: ERA40 analysis
1 January, 2009 by Gareth Marshall, Liz Thomas, Louise Sime, Robert Mulvaney
Analysis of ERA40 temperature and accumulation data suggests that annual mean isotopic fluctuations due to temperature change will be geographically very variable across the Peninsula: isotopic variations of 0.4 parts…Damping of tropical instability waves caused by the action of surface currents on stress
1 January, 2009 by Pierre Dutrieux
Ocean eddies and fronts affect surface stress via two mechanisms: (1) ocean surface currents altering the relative motion between air and sea and, hence, the stress fields and (2) ocean…Nature of the Antarctic Peninsula Ice Sheet during the Pliocene: geological evidence and modelling results compared
1 January, 2009 by Claus-Dieter Hillenbrand
In this paper, we examine the nature of the Pliocene Antarctic Peninsula Ice Sheet by comparing the terrestrial and marine geological records of the Antarctic Peninsula and surrounding sea floor…Bedform topography and basal conditions beneath a fast-flowing West Antarctic ice stream
1 January, 2009 by Andy Smith
A grid of seismic reflection lines has been used to image basal topography and infer basal conditions and flow processes beneath similar to 140 km(2) of Rutford Ice Stream, West…Sediment infill of subglacial meltwater channels on the West Antarctic continental shelf
1 January, 2009 by Claus-Dieter Hillenbrand, James Smith
Subglacial meltwater plays a significant yet poorly understood role in the dynamics of the Antarctic ice sheets. Here we present new swath bathymetry from the western Amundsen Sea Embayment, West…Quantifying the metabolic cost to an Antarctic liverwort of responding to an abrupt increase in UVB radiation exposure
1 January, 2009 by Dominic Hodgson, Kevin Newsham, Peter Convey
We quantified the metabolic cost to the Antarctic leafy liverwort Cephaloziella varians of responding to an abrupt increase in ultraviolet B (UVB) radiation exposure in the natural environment at Rothera…Subglacial intermediate volcanism at Kerlingarfjoll, Iceland: magma-water interactions beneath thick ice
1 January, 2009
The products of andesite and dacite glaciovolcanism at Kerlingarfjoll are unlike others previously described in the literature. Three sequences of lithofacies are described and interpreted here. The andesitic deposits at…Using fatty acid analysis to elucidate the feeding habits of Southern Ocean mesopelagic fish
1 January, 2009 by Gabriele Stowasser, Martin Collins
Fatty acid biomarkers were used to investigate the feeding ecology of 17 mesopelagic fish species occurring in the Southern Ocean. Fatty acid signatures of species where little or no dietary…Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period
1 January, 2009
Ice cores provide a record of changes in dust flux to Antarctica, which is thought to reflect changes in atmospheric circulation and environmental conditions in dust source areas(1-9). Isotopic tracers…One hundred questions of importance to the conservation of global biological diversity
1 January, 2009 by Lloyd Peck
We identified 100 scientific questions that, if answered, would have the greatest impact on conservation practice and policy. Representatives from 21 international organizations, regional sections and working groups of the…Read more on One hundred questions of importance to the conservation of global biological diversity
Variability and predictability of Antarctic krill swarm structure
1 January, 2009 by Eugene Murphy, Geraint Tarling, Jonathan Watkins, Sophie Fielding
Swarming is a fundamental part of the life of Euphausia superba, yet we still know very little about what drives the considerable variability in swarm shape, size and biomass. We…Read more on Variability and predictability of Antarctic krill swarm structure
Egg-release behaviour in Antarctic krill
1 January, 2009 by Geraint Tarling
The process of egg release is a complex and crucial step in the life cycle of euphausiids, especially with regards mortality and recruitment success. We examined this process in Antarctic…Soil trampling in an Antarctic Specially Protected Area: tools to assess levels of human impact
1 January, 2009 by Peter Convey
Research in extremely delicate environments must be sensitive to the need to minimize impacts caused simply through the presence of research personnel. This study investigates the effectiveness of current advice…Improving ice core interpretation using in situ and reanalysis data
1 January, 2009 by Liz Thomas, Thomas Bracegirdle
Back trajectory analysis, provided by the British Atmospheric Data Centre using meteorological parameters from the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis ERA-40 (1980-2001) and operational analysis (2002-2006), is…Read more on Improving ice core interpretation using in situ and reanalysis data
Surface circulation at the tip of the Antarctic Peninsula from drifters
1 January, 2009 by Angelika Renner, Sally Thorpe
An array of 40 surface drifters, drogued at 15-m depth, was deployed in February 2007 to the east of the tip of the Antarctic Peninsula as part of the Antarctic…Read more on Surface circulation at the tip of the Antarctic Peninsula from drifters
Impacts of local human activities on the Antarctic environment
1 January, 2009 by Kevin Hughes, Peter Convey
We review the scientific literature, especially from the past decade, on the impacts of human activities on the Antarctic environment. A range of impacts has been identified at a variety…Read more on Impacts of local human activities on the Antarctic environment
Stable water isotopes in HadCM3: isotopic signature of El Nino-Southern Oscillation and the tropical amount effect
1 January, 2009 by Louise Sime
Stable water isotopes have been added to the full hydrological cycle of the Hadley Centre Climate model (HadCM3) coupled atmosphere-ocean GCM. Simulations of delta O-18 in precipitation and at the…Exploitation of the marine ecosystem in the sub-Antarctic: historical impacts and current consequences
1 January, 2009 by Philip Trathan
The Southern Ocean is ofren portrayed as rhe last great wilderness. However, the marine living resources of the sub-Antarctic islands haw been harvested for over two centuries. ExploitaLion began with…Vision in lanternfish (Myctophidae): Adaptations for viewing bioluminescence in the deep-sea
1 January, 2009 by Martin Collins
The sensitivity hypothesis seeks to explain the correlation between the wavelength of visual pigment absorption maxima (lambda(max)) and habitat type in fish and other marine animals in terms of the…Strong wind events in the Antarctic
1 January, 2009 by Andrew Orr, Gareth Marshall, John Turner, Tony Phillips
We use quality controlled in situ meteorological observations collected at Antarctic research stations over the last 60 years to carry out the first continent-wide investigation into the occurrence, variability, and…Contrasting climate change in the two polar regions
1 January, 2009 by John Turner
The two polar regions have experienced remarkably different climatic changes in recent decades. The Arctic has seen a marked reduction in sea-ice extent throughout the year, with a peak during…Read more on Contrasting climate change in the two polar regions
Impact of different energies of precipitating particles on NOx generation in the middle and upper atmosphere during geomagnetic storms
1 January, 2009 by Mark Clilverd
Energetic particle precipitation couples the solar wind to the Earth's atmosphere and indirectly to Earth's climate. Ionisation and dissociation increases, due to particle precipitation, create odd nitrogen (NOx) and odd…Taxonomic affinities of dark septate root endophytes of Colobanthus quitensis and Deschampsia antarctica, the two native Antarctic vascular plant species
1 January, 2009 by David Pearce, Kevin Newsham
Although dark septate fungal endophytes (DSE) occur widely in association with plant roots in cold-stressed habitats, little is known of the taxonomic status of DSE in Antarctica. Here we investigate…Nitrogen form influences the response of Deschampsia antarctica to dark septate root endophytes
1 January, 2009 by Kevin Newsham
Fungi with dematiaceous septate hyphae, termed dark septate endophytes (DSE), are common in plant roots, particularly in cold-stressed habitats, but their effects on their host plants remain obscure. Here, we…Dynamics of the Earth’s particle radiation environment
1 January, 2009 by Richard Horne
The physical processes affecting the dynamics of the Earth's particle radiation environment are reviewed along with scientific and engineering models developed for its description. The emphasis is on models that…Read more on Dynamics of the Earth’s particle radiation environment
The adaptive value of energy storage and capital breeding in seasonal environments
1 January, 2009 by Geraint Tarling
Timing of reproduction in a seasonal cycle is a life history trait with important fitness consequences. Capital breeders produce offspring from stored resources and, by decoupling feeding and reproduction, may…Read more on The adaptive value of energy storage and capital breeding in seasonal environments
Ice sheets: indicators and instruments of climate change
1 January, 2009 by David Vaughan
Ice sheets of Greenland and Antarctica are uniquely arresting and captivating features of the Earth’s natural environment. The hyperbole attached to their description, their sheer size and remoteness from the…Read more on Ice sheets: indicators and instruments of climate change
Benthoctopus rigbyae n. sp., a new species of cephalopod (Octopoda; Incirrata) from near the Antarctic Peninsula
1 January, 2009
Among the many octopods collected during recent Antarctic trawling surveys were 93 specimens of an undescribed octopod with biserial suckers. Although most similar in appearance to the sub-Antarctic Benthoctopus levis…Theory and observations of Ekman flux in the chlorophyll distribution downstream of South Georgia.
1 January, 2009 by Hugh Venables, Michael Meredith
A large phytoplankton bloom occurs downstream of South Georgia, an island on the northern edge of the Scotia Sea, Atlantic sector of the Southern Ocean. This is due to natural…The importance of dispersal related and local factors in shaping the taxonomic structure of diatom metacommunities
1 January, 2009 by Dominic Hodgson
To date, little is known about the relative importance of dispersal related versus local factors in shaping microbial metacommunities. A common criticism regarding existing datasets is that the level of…Quantifying habitat use and preferences of pelagic seabirds using individual movement data: a review
1 January, 2009 by Richard Phillips
Colonial seabirds are relatively easy to observe, count, measure and manipulate, and consequently have long been used as models for testing ecological hypotheses. A combination of animal tracking and satellite…Wind field and sex constrain the flight speeds of central-place foraging albatrosses
1 January, 2009 by Gareth Marshall, Philip Trathan, Richard Phillips
By extracting energy from the highly dynamic wind and wave fields that typify pelagic habitats, albatrosses are able to proceed almost exclusively by gliding flight. Although energetic costs of gliding…Read more on Wind field and sex constrain the flight speeds of central-place foraging albatrosses
Freshwater transport at Fimbulisen, Antarctica
1 January, 2009 by Povl Abrahamsen, Keith Nicholls
The intricate near-circumpolar system of fronts and currents surrounding Antarctica isolates much of Earth's freshwater from the saline oceans immediately north. The Antarctic Slope Front sustains bathymetrically steered flow at…Kinetic equation of linear fractional stable motion and applications to modeling the scaling of intermittent bursts
1 January, 2009
Lévy flights and fractional Brownian motion have become exemplars of the heavy-tailed jumps and longranged memory widely seen in physics. Natural time series frequently combine both effects, and linear fractional…Early larval development of the Sydney rock oyster Saccostrea glomerata under near-future predictions of CO2-driven ocean acidification
1 January, 2009 by Lloyd Peck
Anthropogenic emissions of carbon dioxide (CO2) from fossil fuel combustion and deforestation are rapidly increasing the atmospheric concentration of CO2 and reducing the pH of the oceans. This study shows…Pockmarks: refuges for marine benthic biodiversity
1 January, 2009 by David Barnes
Pockmarks are one of the most obvious and abundant structural features of the North Sea seabed, yet their influence on fauna is virtually unknown. We report the distribution of benthic…Read more on Pockmarks: refuges for marine benthic biodiversity
Benthic ecology of pockmarks in the Inner Oslofjord, Norway
1 January, 2009 by David Barnes
Despite pockmarks being one of the most widespread small-scale topographic features of the seabed, almost nothing is known of their influence on fauna. Here we present the first ecological study…Read more on Benthic ecology of pockmarks in the Inner Oslofjord, Norway
Late Cenozoic ice sheet cyclicity in the western Amundsen Sea Embayment – evidence from seismic records
1 January, 2009 by Robert Larter
Multichannel seismic reflection profiles provide a record of the glacial development in the western Amundsen Sea Embayment during the Neogene. We identified a northwest-dipping reflector series of more than 1…Role of krill versus bottom-up factors in controlling phytoplankton biomass in the northern Antarctic waters of South Georgia
1 January, 2009 by Peter Ward, Sophie Fielding
The extent to which Antarctic phytoplankton stocks are controlled by 'bottom-up' and/or 'top-down' factors is highly variable. Here we consider data collected at South Georgia during 3 summer surveys that…An Ordovician lobopodian from the Soom Shale Lagerstatte, South Africa
1 January, 2009 by Rowan Whittle
The first lobopodian known from the Ordovician is described from the Soom Shale Lagerstatte, South Africa. The organism shows features homologous to Palaeozoic marine lobopodians described from the Middle Cambrian…Read more on An Ordovician lobopodian from the Soom Shale Lagerstatte, South Africa
Numerical simulation of the Filchner overflow
1 January, 2009
The plume of Ice Shelf Water (ISW) flowing into the Weddell Sea over the Filchner sill contributes to the formation of Antarctic Bottom Water. The Filchner overflow is simulated using…Palaeoproterozoic to Palaeozoic magmatic and metamorphic events in the Shackleton Range, East Antarctica: Constraints from zircon and monazite dating, and implications for the amalgamation of Gondwana
1 January, 2009
A comprehensive set of new geochronological data from different parts of the Shackleton Range in East Antarctica, comprising U–Pb single zircon and Th–U–Pb single and multi-grain monazite data, combined with…