Our publications

Showing: All publications

Found 13319 items

A statistical approach to determining energetic outer radiation-belt electron precipitation fluxes

1 May, 2014 by Mark Clilverd, Neil Cobbett, Paul Breen

Sub-ionospheric radio-wave data from an AARDDVARK receiver located in Churchill, Canada, is analysed to determine the characteristics of electron precipitation into the atmosphere over the range 3 30 keV precipitation fluxes of…

Read more on A statistical approach to determining energetic outer radiation-belt electron precipitation fluxes

Morphological and molecular characterization of salps (Thalia spp.) from the Tristan da Cunha archipelago

1 May, 2014 by Will Goodall-Copestake

The identification of salp species by morphological features alone can be challenging. This study combined morphological and molecular approaches to characterize different salp reproductive forms (oozooids and blastozooids) collected from…

Read more on Morphological and molecular characterization of salps (Thalia spp.) from the Tristan da Cunha archipelago

Characterisation of vertical BrO distribution during events of enhanced tropospheric BrO in Antarctica, from combined remote and in-situ measurements

1 May, 2014 by Anna Jones, Howard Roscoe, Neil Brough

Tropospheric BrO was measured by a ground-based remote-sensing spectrometer at Halley in Antarctica in spring 2007, and BrO was measured by satellite-borne remote-sensing spectrometers using similar spectral regions and similar…

Read more on Characterisation of vertical BrO distribution during events of enhanced tropospheric BrO in Antarctica, from combined remote and in-situ measurements

NGRIP CH4 concentration from 120 to 10 kyr before present and its relation to a δ15N temperature reconstruction from the same ice core

30 April, 2014 by Emilie Capron

During the last glacial cycle, Greenland temperature showed many rapid temperature variations, the so called Dansgaard-Oeschger (DO) events. The past atmospheric methane concentration closely followed these temperature variations, which implies…

Read more on NGRIP CH4 concentration from 120 to 10 kyr before present and its relation to a δ15N temperature reconstruction from the same ice core

Effects of temperature on heat-shock responses and survival of two species of marine invertebrates from sub-Antarctic Marion Island

1 April, 2014 by Lloyd Peck

This study examined high temperature survival and heat shock protein 70 (Hsp70) responses to temperature variation for two marine invertebrate species on sub-Antarctic Marion Island. The isopod Exosphaeroma gigas Leach…

Read more on Effects of temperature on heat-shock responses and survival of two species of marine invertebrates from sub-Antarctic Marion Island

Experimental influence of pH on the early life-stages of sea urchins I: different rates of introduction give rise to different responses

1 April, 2014 by Lloyd Peck, Melody Clark

Many early life-stage response studies to ocean acidification utilize gametes/offspring obtained from ambient-sourced parents, which are then directly introduced to experimentally altered seawater pH. This approach may produce a stress…

Read more on Experimental influence of pH on the early life-stages of sea urchins I: different rates of introduction give rise to different responses

Foraging zones of the two sibling species of giant petrels in the Indian Ocean throughout the annual cycle: implication for their conservation

3 March, 2014 by Richard Phillips

We studied the year-round distribution and at-sea activity patterns of the sibling species, northern giant petrel Macronectes halli and southern giant petrel M. giganteus. Loggers combining light-based geolocators and immersion…

Read more on Foraging zones of the two sibling species of giant petrels in the Indian Ocean throughout the annual cycle: implication for their conservation

Bycatch of great albatrosses in pelagic longline fisheries in the southwest Atlantic: Contributing factors and implications for management

1 March, 2014 by Richard Phillips

Pelagic longline fisheries in the southwest Atlantic are a major conservation concern for several threatened seabirds, including four species of great albatrosses: wandering albatross (Diomedea exulans), Tristan albatross (Diomedea dabbenena),…

Read more on Bycatch of great albatrosses in pelagic longline fisheries in the southwest Atlantic: Contributing factors and implications for management

Basal roughness of the Institute and Möller Ice Streams, West Antarctica: Process determination and landscape interpretation

12 February, 2014 by Fausto Ferraccioli, Hugh Corr, Tom Jordan

We present a detailed analysis of bed roughness beneath Institute and Möller Ice Streams, west Antarctica, using radio-echo sounding data (RES) acquired in the austral summer of 2010/11. We assess…

Read more on Basal roughness of the Institute and Möller Ice Streams, West Antarctica: Process determination and landscape interpretation

Species versus guild level differentiation revealed across the annual cycle by isotopic niche examination

9 February, 2014 by Richard Phillips

Summary 1.Interspecific competitive interactions typically result in niche differentiation to alleviate competition through mechanisms including character displacement. However, competition is not the sole constraint on resource partitioning, and its effects…

Read more on Species versus guild level differentiation revealed across the annual cycle by isotopic niche examination

Love thy neighbour or opposites attract? Patterns of spatial segregation and association among crested penguin populations during winter

5 February, 2014 by Catharine Horswill, Hugh Venables, Iain Staniland, Norman Ratcliffe, Philip Trathan, Stacey Adlard

Competition for food among populations of closely related species and conspecifics that occur in both sympatry and parapatry can be reduced by interspecific and intraspecific spatial segregation. According to predictions…

Read more on Love thy neighbour or opposites attract? Patterns of spatial segregation and association among crested penguin populations during winter

Understanding controls on rapid ice-stream retreat during the last deglaciation of Marguerite Bay, Antarctica, using a numerical model

1 February, 2014 by Claus-Dieter Hillenbrand

Using a one-dimensional numerical model of ice-stream flow with robust grounding-line dynamics, we explore controls on paleo-ice-stream retreat in Marguerite Bay, Antarctica, during the last deglaciation. Landforms on the continental…

Read more on Understanding controls on rapid ice-stream retreat during the last deglaciation of Marguerite Bay, Antarctica, using a numerical model

Mechanistic modeling of sulfur-deprived photosynthesis and hydrogen production in suspensions of Chlamydomonas Reinhardtii

1 February, 2014 by Rosie Williams

The ability of unicellular green algal species such as Chlamydomonas reinhardtii to produce hydrogen gas via iron-hydrogenase is well known. However, the oxygen-sensitive hydrogenase is closely linked to the photosynthetic…

Read more on Mechanistic modeling of sulfur-deprived photosynthesis and hydrogen production in suspensions of Chlamydomonas Reinhardtii

Habitat-mediated population limitation in a colonial central-place forager: the sky is not the limit for the black-browed albatross

15 January, 2014 by Richard Phillips

Animal populations are frequently limited by the availability of food or of habitat. In central-place foragers, the cost of accessing these resources is distance-dependent rather than uniform in space. However,…

Read more on Habitat-mediated population limitation in a colonial central-place forager: the sky is not the limit for the black-browed albatross

Variability in transport pathways on and around the South Georgia shelf, Southern Ocean: Implications for recruitment and retention

15 January, 2014 by Eugene Murphy, Emma Young, Sally Thorpe

The waters around South Georgia are among the most productive in the Southern Ocean, with zooplankton populations close to the island, in particular Antarctic krill, supporting vast colonies of higher…

Read more on Variability in transport pathways on and around the South Georgia shelf, Southern Ocean: Implications for recruitment and retention

Seasonal sexual segregation by monomorphic sooty shearwaters Puffinus griseus reflects different reproductive roles during the pre-laying period

9 January, 2014 by Richard Phillips

Tracking technology has revolutionized knowledge of seabird movements; yet, few studies have examined sex differences in distribution and behavior of small to medium-sized, sexually-monomorphic seabirds. Application of bird-borne geolocation-immersion loggers…

Read more on Seasonal sexual segregation by monomorphic sooty shearwaters Puffinus griseus reflects different reproductive roles during the pre-laying period