Results 81 to 90 of about 190,113 (342)

Modelling erratic dispersal accounting for shifting ice flow geometries: A new method and explanations of erratic dispersal of the British–Irish Ice Sheet

Journal of Quaternary Science, EarlyView.
ABSTRACT Glacial erratics are geologically distinctive rocks transported away from their source area by ice sheets and deposited in lithologically different bedrock areas. They have attracted much scientific curiosity with >24 000 observations across the British Isles.
R. L. Veness, C. D. Clark, J. C. Ely, J. L. Knight, A. Igneczi, S. L. Bradley   +5 more
wiley   +1 more source

A twenty-first century structural change in Antarctica’s sea ice system

Communications Earth & Environment
From 1979 to 2016, total Antarctic sea ice extent experienced a positive trend with record winter maxima in 2012 and 2014. Record summer minima followed within the period 2017-2024, raising the possibility that the Antarctic sea ice system might be ...
Marilyn N. Raphael, Thomas J. Maierhofer, Ryan L. Fogt, William R. Hobbs, Mark S. Handcock   +4 more
doaj   +1 more source

Winds and Meltwater Together Lead to Southern Ocean Surface Cooling and Sea Ice Expansion

Geophysical Research Letters, 2023
Southern Ocean surface cooling and Antarctic sea ice expansion from 1979 through 2015 have been linked both to changing atmospheric circulation and melting of Antarctica's grounded ice and ice shelves.
Lettie A. Roach, Kenneth D. Mankoff, Anastasia Romanou, Edward Blanchard‐Wrigglesworth, Thomas W. N. Haine, Gavin. A. Schmidt   +5 more
doaj   +1 more source

Model sensitivity of the Weddell and Ross seas, Antarctica, to vertical mixing and freshwater forcing [PDF]

, 2015
We examine the sensitivity of the Weddell and Ross seas to vertical mixing and surface freshwater forcing using an ocean–sea ice model. The high latitude Southern Ocean is very weakly stratified, with a winter salinity difference across the pycnocline of
Aksenov, Yevgeny, Bacon, Sheldon, Coward, Andrew C., Holland, Paul R., Kjellsson, Joakim, Marshall, Gareth J., Mathiot, Pierre, Megann, Alex P., Ridley, Jeff   +8 more
core   +1 more source

Arctic and Antarctic Sea Ice Change: Contrasts, Commonalities, and Causes.

Annual Review of Marine Science, 2019
Arctic sea ice has declined precipitously in both extent and thickness over the past four decades; by contrast, Antarctic sea ice has shown little overall change, but this masks large regional variability.
T. Maksym
semanticscholar   +1 more source

Vegetation and environmental dynamics in the central part of the Kola Peninsula during the past 13.3 ka as reflected by ancient plant DNA on sediments from Lake Imandra

Journal of Quaternary Science, EarlyView.
ABSTRACT The first high‐resolution reconstruction of the vegetation and environmental changes during the last ca 13 300 cal a BP in the central part of the Kola Peninsula (NW Russia) was reconstructed based on sedimentary ancient DNA (sedaDNA) metabarcoding on sediment core Co1410 from Lake Imandra.
Anastasia Poliakova, Matthias Lenz, Martin Melles, Grigory Fedorov, Marie K. F. Merkel, Inger G. Alsos   +5 more
wiley   +1 more source

Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice

Environmental Research Letters, 2022
Antarctic sea ice plays an important role in polar ecosystems and global climate, while its variability is affected by many factors. Teleconnections between the tropical and high latitudes have profound impacts on Antarctic climate changes through the ...
Xuya Ren, Li Zhang, Wenju Cai, Xichen Li, Chuan-Yang Wang, Yishuai Jin, Lixin Wu   +6 more
doaj   +1 more source

Modelling ice dynamic contributions to sea level rise from the Antarctic Peninsula [PDF]

, 2015
The future ice dynamical contribution to sea-level rise (SLR) from 210 ice shelf nourishing drainage basins of the Antarctic Peninsula Ice Sheet (APIS) is simulated, using the British Antarctic Survey Antarctic Peninsula Ice Sheet Model.
Barrand, N. E., Radić, V., Schannwell, C.   +2 more
core   +2 more sources

Seasonally migrating zooplankton strongly enhance Southern Ocean carbon sequestration

Limnology and Oceanography, EarlyView.
Abstract High‐latitude zooplankton can sequester millions of tons of carbon due to their seasonal migration from the surface ocean to depth, and their respiration and mortality during overwintering. This seasonal vertical migration pump (SVMP) efficiently removes carbon but not limiting nutrients such as iron from the surface layers.
Guang Yang, Angus Atkinson, Evgeny A. Pakhomov, Katrin Schmidt, Weilei Wang, Jennifer J. Freer, Geraint A. Tarling   +6 more
wiley   +1 more source

Decadal transformations of antarctic sea ice modes

Frontiers in Marine Science
In light of ongoing global warming and the accelerated melting of Antarctic sea ice, this study aims to analyze the recent changes in the principal modes of Antarctic sea ice over the past decade, utilizing Empirical Orthogonal Function (EOF) and ...
Benli Guo, Benli Guo, Benli Guo, Peng Yang, Peng Yang, Peng Yang, Jie Yuan, Jie Yuan, Jie Yuan, Honglian Xing, Honglian Xing, Honglian Xing, Wenjie Yuan, Wenjie Yuan, Wenjie Yuan, Yuanku Meng, Yuanku Meng, Yuanku Meng   +17 more
doaj   +1 more source