Modelling the rheology of sea ice as a collection of diamond-shaped floes
In polar oceans, seawater freezes to form a layer of sea ice of several metres thickness that can cover up to 8% of the Earth’s surface. The modelled sea ice […]
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Read more of: Modelling the rheology of sea ice as a collection of diamond-shaped floes
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Sea ice is a mushy layer
Read more of: Sea ice is a mushy layerSea ice is a two-phase, two-component, reactive porous medium: an example of what is known in other contexts as a mushy layer. The fundamental conservation laws underlying the mathematical description […]
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Spatial structure of ionospheric convection velocities in regions of open and closed magnetic field topology
Read more of: Spatial structure of ionospheric convection velocities in regions of open and closed magnetic field topologyWe present a spatial structure function analysis of ionospheric velocity, measured by the Halley Super Dual Auroral Radar Network (SuperDARN) radar over five years. We show evidence for scale-free velocity […]
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Disturbance, colonization and development of Antarctic benthic communities
Read more of: Disturbance, colonization and development of Antarctic benthic communitiesA decade has yielded much progress in understanding polar disturbance and community recovery—mainly through quantifying ice scour rates, other disturbance levels, larval abundance and diversity, colonization rates and response of […]
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Status and distribution of wandering, black-browed and grey-headed albatrosses breeding at South Georgia
Read more of: Status and distribution of wandering, black-browed and grey-headed albatrosses breeding at South GeorgiaLong-term studies at Bird Island, South Georgia, show that numbers of wandering, black-browed and grey-headed albatrosses have been decreasing since the late 1970s. To determine the status of the total […]
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Latest Jurassic-earliest Cretaceous age for a fossil flora from the Latady Basin, Antarctic Peninsula
Read more of: Latest Jurassic-earliest Cretaceous age for a fossil flora from the Latady Basin, Antarctic PeninsulaDating Jurassic terrestrial floras in the Antarctic Peninsula has proved problematic and controversial. Here U–Pb series dating on detrital zircons from a conglomerate interbedded with fossil plant material provide a […]
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Phase space density analysis of the outer radiation belt energetic electron dynamics
Read more of: Phase space density analysis of the outer radiation belt energetic electron dynamicsWe present an analysis of the electron phase space density in the Earth’s outer radiation belt during three magnetically disturbed periods to determine the likely roles of inward radial diffusion […]
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A role for newly forming sea ice in springtime polar tropospheric ozone loss? Observational evidence from Halley station, Antarctica
Read more of: A role for newly forming sea ice in springtime polar tropospheric ozone loss? Observational evidence from Halley station, AntarcticaSince March 2003, measurements of surface ozone have been made at the British Antarctic Survey Clean Air Sector Laboratory (CASLab) at Halley station in coastal Antarctica. Detailed measurements of boundary […]
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Consumption of large bathyal food fall, a six month study in the NE Atlantic
Read more of: Consumption of large bathyal food fall, a six month study in the NE AtlanticWe deployed 2 porpoise (Phocoena phocoena) carcasses at bathyal depth (2555 to 2710 m) in the Porcupine Seabight, NE Atlantic for periods of 1 wk and 6 mo respectively. Consumption […]
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Contrasts between the summertime surface energy balance and boundary layer structure at Dome C and Halley stations, Antarctica
Read more of: Contrasts between the summertime surface energy balance and boundary layer structure at Dome C and Halley stations, AntarcticaThe Antarctic research stations of Dome C and Halley lie at similar latitudes (∼75°S) and are thus subject to similar diurnal variation of solar radiation at the top of the […]
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Observations of nightside magnetic reconnection during substorm growth and expansion phases
Read more of: Observations of nightside magnetic reconnection during substorm growth and expansion phasesThe temporal and spatial variability of nightside magnetic reconnection is described using two-dimensional ionospheric measurements during the growth phase and early expansion phase of a single substorm. Two techniques (A […]
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Global climate drives southern right whale (Eubalaena australis) population dynamics
Read more of: Global climate drives southern right whale (Eubalaena australis) population dynamicsSea surface temperature (SST) time-series from the southwest Atlantic and the El Niño 4 region in the western Pacific were compared to an index of annual calving success of the […]