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Silicon isotopes reveal the impact of fjordic processes on the transport of reactive silicon from glaciers to coastal regions

20 December, 2024 by Kate Hendry

Accelerated mass loss from the Greenland Ice Sheet leads to retreating glaciers and enhanced freshwater runoff to adjacent coastal regions, potentially providing additional essential nutrients, such as silicon, to downstream…

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Direct Geologic Constraints on the Timing of Late Holocene Ice Thickening in the Amundsen Sea Embayment, Antarctica

19 December, 2024 by Jonathan Adams, Joanne Johnson, Stephen Roberts

Constraining past West Antarctic Ice Sheet (WAIS) change helps validate numerical models simulating future ice sheet dynamics. Following rapid deglaciation during the mid-Holocene, ice near Thwaites Glacier was ∼35 m…

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Uncharted territory: the arrival of Psychoda albipennis (Zetterstedt, 1850) (Diptera: Psychodidae) in Maritime Antarctica

17 December, 2024 by Peter Convey

Despite increasing awareness of the threats they pose, exotic species continue to arrive in Antarctica with anthropogenic assistance, some of which inevitably have the potential to become aggressively invasive. Here,…

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Exploring Sources of Gravity Waves in the Southern Winter Stratosphere Using 3-D Satellite Observations and Backward Ray-Tracing

16 December, 2024 by Tracy Moffat-Griffin

During austral winter, the southern high latitudes has some of the most intense stratospheric gravity wave (GW) activity globally. However, producing accurate representations of GW dynamics in this region in…

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A High‐Resolution Microscopy System for Biological Studies of Cold‐Adapted Species Under Physiological Conditions

15 December, 2024 by Anne-Pia Marty, Lloyd Peck, Melody Clark

The Antarctic seabed harbors significant biodiversity, and almost 90% of oceanic environments are permanently below 5 °C (i.e., deep sea and polar regions). However, organisms whose entire lifecycle occurs around…

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Sources and Seasonal Variations of Per- and Polyfluoroalkyl Substances (PFAS) in Surface Snow in the Arctic

10 December, 2024 by Jack Humby

Per- and polyfluoroalkyl substances (PFAS) are persistent anthropogenic contaminants, some of which are toxic and bioaccumulative. Perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkyl sulfonic acids (PFSAs) can form during the atmospheric…

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Brief communication: New perspectives on the skill of modelled sea ice trends in light of recent Antarctic sea ice loss

5 December, 2024 by Caroline Holmes, Jeremy Wilkinson, Paul Holland, Thomas Bracegirdle

Most climate models do not reproduce the 1979–2014 increase in Antarctic sea ice cover. This was a contributing factor in successive Intergovernmental Panel on Climate Change reports allocating low confidence…

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Seawater Lead Isotopes Record Early Miocene to Modern Circulation Dynamics in the Pacific Sector of the Southern Ocean

5 December, 2024 by Claus-Dieter Hillenbrand

The Antarctic Circumpolar Current (ACC) is Earth's largest current flowing around Antarctica at all depths and connecting major ocean basins, thus representing an important component of Earth's climate. However, the…

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Shallow coverage in shallow waters: the incompleteness of intertidal species inventories in biodiversity database records

2 December, 2024 by Jakob Thyrring, Lloyd Peck

The availability of online biodiversity data has increased in recent decades, aiding our understanding of diversity patterns and species richness–environment relationships across temporal and spatial scales. However, even the most…

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Phylogeography of Cold Water Soft Coral Alcyonium spp. (Anthozoa, Octocorallia: Alcyonacea) Between South America and the West Antarctic Peninsula

2 December, 2024 by Simon Morley

The Antarctic marine environment has a unique geologic and climatic history that has contributed to the evolution of high species diversity. Given the current trend of environmental warming, understanding the…

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Measuring seismic attenuation in polar firn: method and application to Korff Ice Rise, West Antarctica

1 December, 2024 by Alex Brisbourne, Andy Smith, Ronan Agnew

We present seismic measurements of the firn column at Korff Ice Rise, West Antarctica, including measurements of compressional-wave velocity and attenuation. We describe a modified spectral-ratio method of measuring the…

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Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula

1 December, 2024 by Liz Thomas

Stable water isotope records of six firn cores retrieved from two adjacent plateaus on the northern Antarctic Peninsula between 2014 and 2016 are presented and investigated for their connections with…

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Life-history stage influences immune investment and oxidative stress in response to environmental heterogeneity in Antarctic fur seals

1 December, 2024 by Cameron Fox-Clarke, Camille Toscani, Claire Stainfield, Jaume Forcada

Immune defenses are crucial for survival but costly to develop and maintain. Increased immune investment is therefore hypothesized to trade-off with other life-history traits. Here, we examined innate and adaptive…

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Community assembly among potential invasive plants in Antarctica shaped by life history characteristics and climate warming

1 December, 2024 by Peter Convey

Species arrival sequence in new habitats impacts plant community development. This ‘priority-effect’ is documented, but mechanisms by which early arriving plants dominate future communities are less clear, complicating our ability…

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Green beauty unveiled: Exploring the potential of microalgae for skin whitening, photoprotection and anti-aging applications in cosmetics

1 December, 2024 by Peter Convey

Microalgae are gaining considerable attention in the field of cosmeceuticals due to their unique profile. In particular, the diverse range of valuable bioactive compounds isolated from microalgae are known to…

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The THINICE field campaign: Interactions between Arctic cyclones, tropopause polar vortices, clouds and sea ice in summer

1 December, 2024 by Alexandra Weiss, Daniel Beeden, Thomas Lachlan-Cope

The THINICE field campaign, based from Svalbard in August 2022, provided unique observations of summertime Arctic cyclones, their coupling with cloud cover, and interactions with tropopause polar vortices and sea…

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A review of global long-term changes in the mesosphere, thermosphere and ionosphere: a starting point for inclusion in (semi-)empirical models

1 December, 2024 by Ingrid Cnossen

The climate of the upper atmosphere, including the mesosphere, thermosphere and ionosphere, is changing. As data records are much more limited than in the lower atmosphere and solar variability becomes…

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The role of ocean circulation and regolith removal in triggering the Mid-Pleistocene Transition: Insights from authigenic Nd isotopes

1 December, 2024 by Claire Allen, Claus-Dieter Hillenbrand

Approximately 1,250,000 to 700,000 years ago, the pacing of glacial-interglacial cycles changed from 41,000 years to ∼100,000 years, a shift known as the ‘Mid-Pleistocene Transition’ (MPT). The cause – or…

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Movements and behaviour of southern right whales satellite-tracked in and beyond a subantarctic archipelago wintering ground

28 November, 2024 by Jennifer Jackson

The post-exploitation recovery of the south-west Atlantic southern right whale (SRW, Eubalaena australis) population has been affected by widespread calf mortalities, resulting in the development of an International Whaling Commission…

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Photophysiology of the first reported bleached crustose coralline alga, Clathromorphum sp. (Hapalidiales, Rhodophyta), from Antarctica

20 November, 2024 by Peter Convey

During a 2019 Chilean Antarctic Scientific Expedition (ECA 55) studying crustose coralline algae (CCA) diversity on the Antarctic Peninsula, bleaching of these algae was observed for the first time in…

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Downscaling precipitation over High-mountain Asia using multi-fidelity Gaussian processes: improved estimates from ERA5

18 November, 2024 by Andrew Orr, Scott Hosking, Kenza Tazi

The rivers of High-mountain Asia provide freshwater to around 1.9 billion people. However, precipitation, the main driver of river flow, is still poorly understood due to limited in situ measurements…

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Novel Method to Quantify Trace Amounts of Isoprene and Monoterpene Secondary Organic Aerosol-Markers in Antarctic Ice

18 November, 2024 by Liz Thomas

Biogenic volatile organic compounds (BVOCs) contribute to the formation of secondary organic aerosol (SOA) through atmospheric oxidation. Previously detected SOA-markers in northern hemisphere ice cores from Alaska, Greenland, Russia, and…

Read more on Novel Method to Quantify Trace Amounts of Isoprene and Monoterpene Secondary Organic Aerosol-Markers in Antarctic Ice

High historical movement rates of Antarctic blue whales on Southern Ocean feeding grounds estimated from Discovery mark data

14 November, 2024 by Jennifer Jackson

Little is known about Antarctic blue whale (Balaenoptera musculus intermedia) movement and migration. In many baleen whales, distinct populations arose due to inherited fidelity to migration routes between breeding and…

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Drivers of interspecific spatial segregation in two closely-related seabird species at a Pan-Atlantic scale

11 November, 2024 by Anne-Sophie Bonnet-Lebrun, Norman Ratcliffe

Aim: Ecologically similar species living in sympatry are expected to segregate to reduce the effects of competition where re-sources are limiting. Segregation from heterospecifics commonly occurs in space, but it…

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Quantification of microplastic targets in environmental matrices using pyrolysis-gas chromatography-mass spectrometry

8 November, 2024 by Rebecca Peel, Stephen Roberts

Microplastic pollution is a growing environmental problem. Consequently, an emerging area of research is the analysis of these micro-particles, to identify the distribution and impacts of plastic in the environment.…

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A new species of Fissidentalium (Scaphopoda: Dentaliidae) in association with an actinostolid anemone from the abyssal Labrador Sea

7 November, 2024 by Katrin Linse

The benthic biodiversity of the abyssal Labrador Sea was investigated using Agassiz trawl and in situ imagery. A megafaunal scaphopod associated with an epizoic anemone was recovered from soft sediments.…

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Expanded Understanding of the Western Antarctic Peninsula Sea-Ice Environment Through Local and Regional Observations at Palmer Station

7 November, 2024 by Michael Meredith

The Western Antarctic Peninsula (WAP) has been experiencing rapid regional warming since at least the 1950s, however, the impacts of this warming at the local scale are variable and nuanced.…

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Molecular phylogenetics of the superfamily Stromboidea (Caenogastropoda): New insights from increased taxon sampling

1 November, 2024 by Alistair Crame

The superfamily Stromboidea is a clade of morphologically distinctive gastropods which include the iconic Strombidae, or ‘true conchs’. In this study, we present the most taxonomically extensive phylogeny of the…

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Trends in population structure of Patagonian toothfish over 25 years of fishery exploitation at South Georgia

1 November, 2024 by Connor Bamford, Martin Collins, Philip Hollyman, Richard Phillips

Patagonian toothfish (Dissostichus eleginoides) supports valuable fisheries across the Southern Ocean under the management of the Commission for the Conservation of Antarctic Marine Living Resources. The fishery at South Georgia…

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Exome capture of Antarctic krill (Euphausia superba) for cost effective genotyping and population genetics with historical collections

1 November, 2024 by Geraint Tarling, Melody Clark

Antarctic krill (Euphausia superba Dana) is a keystone species in the Southern Ocean ecosystem, with ecological and commercial significance. However, its vulnerability to climate change requires an urgent investigation of…

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Development observed in the field of the Antarctic bivalve mollusc Aequiyoldia eightsii at Signy Island, South Orkney Islands

1 November, 2024 by Andrew Clarke, Lloyd Peck

The embryonic development of marine ectotherms has been shown to be strongly temperature dependent across the world's oceans. However, at the coldest sites, in the polar regions, development is even…

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Advances and Next Steps in Observing and Modeling Antarctica’s Coastal Winds

1 November, 2024 by Ella Gilbert, Hua Lu, John King, Michael Haigh, Pierre Dutrieux, Ruth Price, Thomas Caton Harrison, Thomas Bracegirdle

Westerlies prevail at low levels over most of the Southern Ocean. Within about 400 km of Antarctica, the winds reverse direction and become the polar or coastal easterlies. Closer to the…

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Walruses from space: walrus counts in simultaneous remotely piloted aircraft system versus very high-resolution satellite imagery

30 October, 2024 by Hannah Cubaynes, Jaume Forcada, Peter Fretwell

Regular counts of walruses (Odobenus rosmarus) across their pan-Arctic range are necessary to determine accurate population trends and in turn understand how current rapid changes in their habitat, such as…

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Bringing it all together: science priorities for improved understanding of Earth system change and to support international climate policy

18 October, 2024 by Thomas Bracegirdle

We review how the international modelling community, encompassing integrated assessment models, global and regional Earth system and climate models, and impact models, has worked together over the past few decades…

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Seasonal and ocean basin-scale assessment of amino acid δ15N trends in a Southern Ocean marine predator

17 October, 2024 by Philip Trathan

The Southern Ocean exhibits substantial spatio-temporal variation in biogeochemical processes that shape interactions and productivity across food webs. Stable isotopes in marine predators provide an opportunity to capture such variations,…

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