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Climate‐driven substitution of foundation species causes breakdown of a facilitation cascade with potential implications for higher trophic levels

8 September, 2022 by Nadia Frontier

1. Climate change can alter ecological communities both directly, by driving shifts in species distributions and abundances, and indirectly by influencing the strength and direction of species interactions. Within benthic…

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Warming-induced monsoon precipitation phase change intensifies glacier mass loss in the southeastern Tibetan Plateau

6 September, 2022 by Michael McCarthy, Michael McCarthy

Glaciers are key components of the mountain water towers of Asia and are vital for downstream domestic, agricultural, and industrial uses. The glacier mass loss rate over the southeastern Tibetan…

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Ultrasonic and seismic constraints on crystallographic preferred orientations of the Priestley Glacier shear margin, Antarctica

24 August, 2022 by Robert Mulvaney

Crystallographic preferred orientations (CPOs) are particularly important in controlling the mechanical properties of glacial shear margins. Logistical and safety considerations often make direct sampling of shear margins difficult, and geophysical…

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The correspondence between sudden commencements and geomagnetically induced currents: Insights from New Zealand

23 August, 2022 by Mark Clilverd, Mervyn Freeman

Variability of the geomagnetic field induces anomalous Geomagnetically Induced Currents (GICs) in grounded conducting infrastructure. GICs represent a serious space weather hazard, but are not often measured directly and the…

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Understanding Sources and Drivers of Size-Resolved Aerosol in the High Arctic Islands of Svalbard Using a Receptor Model Coupled with Machine Learning

16 August, 2022 by Amelie Kirchgaessner, Anna Jones

Atmospheric aerosols are important drivers of Arctic climate change through aerosol–cloud–climate interactions. However, large uncertainties remain on the sources and processes controlling particle numbers in both fine and coarse modes.…

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Latitudinal variance in the drivers and pacing of warmth during mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean

15 August, 2022 by Lara Perez Miguel, Victoria Peck

Early Pleistocene Marine Isotope Stage (MIS)-31 (1.081 to 1.062 Ma) is a unique interval of extreme global warming, including evidence of a West Antarctic Ice Sheet (WAIS) collapse. Here we…

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Toward Effective Collaborations between Regional Climate Modeling and Impacts-Relevant Modeling Studies in Polar Regions

12 August, 2022 by Andrew Orr, Nadine Johnston

The aim of this workshop was to discuss the needs and challenges in using high-resolution climate model outputs for impacts-relevant modeling. Development of impacts-relevant climate projections in the polar regions…

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Variations in Observations of Geosynchronous Magnetopause and Last Closed Drift Shell Crossings with Magnetic Local Time

10 August, 2022 by Mervyn Freeman, Richard Horne, Sarah Glauert, Thomas Daggitt

We analyse a set of events in which both electron flux dropouts caused by magnetopause shadowing and geosynchronous magnetopause crossings (GMCs) are observed. These observations are compared to event-specific last…

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Microbiomic analysis of bacteria associated with rock tripe lichens in Continental and Maritime Antarctic regions

3 August, 2022 by Peter Convey

Increased research attention is being given to bacterial diversity associated with lichens. Rock tripe lichens (Umbilicariaceae) were collected from two distinct Antarctic biological regions, the continental region near the Japanese…

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Seven snail species hidden in one: Biogeographic diversity in an apparently widespread periwinkle in the Southern Ocean

1 August, 2022 by Simon Morley

Aim: The Antarctic Circumpolar Current imparts significant structure to the Southern Ocean biota. The Antarctic Polar Front is a major barrier to dispersal, with separate species (or sometimes intraspecific clades)…

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Predator-derived bioregions in the Southern Ocean: Characteristics, drivers and representation in marine protected areas

1 August, 2022 by Jennifer Freer, Philip Trathan

Multiple initiatives have called for large-scale representative networks of marine protected areas (MPAs). MPAs should be ecologically representative to be effective, but in large, remote regions this can be difficult…

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Increasing Accumulation of Perfluorocarboxylate Contaminants Revealed in an Antarctic Firn Core (1958–2017)

26 July, 2022 by Anna Jones, Markus Frey, Robert Mulvaney, Holly Winton

Perfluoroalkyl acids (PFAAs) are synthetic chemicals with a variety of industrial and consumer applications that are now widely distributed in the global environment. Here, we report the measurement of six…

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Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy

21 July, 2022 by Claire Allen, Dieter Tetzner, Liz Thomas

The Southern Hemisphere westerly winds are among the most important drivers of recently observed environmental changes in West Antarctica. However, the lack of long-term wind records in this region hinders…

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Central tropical Pacific convection drives extreme high temperatures and surface melt on the Larsen C Ice Shelf, Antarctic Peninsula

13 July, 2022 by John King, John Turner

Northern sections of the Larsen Ice Shelf, eastern Antarctic Peninsula (AP) have experienced dramatic break-up and collapse since the early 1990s due to strong summertime surface melt, linked to strengthened…

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Shell thickness of Nucella lapillus in the North Sea increased over the last 130 years despite ocean acidification

9 July, 2022 by Dennis Mayk, Lloyd Peck

Ocean acidification and global climate change are predicted to negatively impact marine calcifiers, with species inhabiting the intertidal zone being especially vulnerable. Current predictions of organism responses to projected changes…

Read more on Shell thickness of Nucella lapillus in the North Sea increased over the last 130 years despite ocean acidification

The genetic consequences of captive breeding, environmental change and human exploitation in the endangered peninsular pronghorn

4 July, 2022

Endangered species with small population sizes are susceptible to genetic erosion, which can be detrimental to long-term persistence. Consequently, monitoring and mitigating the loss of genetic diversity are essential for…

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Fishers’ tales—Impact of artisanal fisheries on threatened sharks and rays in the Bay of Bengal, Bangladesh

1 July, 2022 by Rachel Cavanagh

Increasing fishing pressure has negatively impacted elasmobranch populations globally. Despite high levels of historical and current fishing pressure, the Bay of Bengal region remains data-poor. Focusing on Bangladesh, we conducted…

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