Results 21 to 30 of about 11,425 (144)

DASSO: a data assimilation system for the Southern Ocean that utilizes both sea-ice concentration and thickness observations

Journal of Glaciology, 2021
To improve Antarctic sea-ice simulations and estimations, an ensemble-based Data Assimilation System for the Southern Ocean (DASSO) was developed based on a regional sea ice–ocean coupled model, which assimilates sea-ice thickness (SIT) together with sea-
Hao Luo, Qinghua Yang, Longjiang Mu, Xiangshan Tian-Kunze, Lars Nerger, Matthew Mazloff, Lars Kaleschke, Dake Chen   +7 more
doaj   +1 more source

Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) [PDF]

Climate of the Past, 2022
Antarctic sea ice forms a critical part of the Southern Ocean and global climate system. The behaviour of Antarctic sea ice throughout the last glacial-interglacial (G-IG) cycle (12 000–130 000 years) allows us to investigate the interactions between sea
M. Chadwick, X. Crosta, O. Esper, L. Thöle, K. E. Kohfeld, K. E. Kohfeld   +5 more
doaj   +1 more source

An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Sea‐Ice Extent Over the 20th Century

Geophysical Research Letters, 2023
Sea‐ice extent is predicted to decrease in a warming climate. However, despite global warming over the past century, total Antarctic sea ice remained relatively stable from 1979 until 2015, before strongly melting.
Quentin Dalaiden, Jeanne Rezsöhazy, Hugues Goosse, Elizabeth R. Thomas, Diana O. Vladimirova, Dieter Tetzner   +5 more
doaj   +1 more source

Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e [PDF]

Climate of the Past, 2022
Environmental conditions during Marine Isotope Stage (MIS) 5e (130–116 ka) represent an important “process analogue” for understanding the climatic responses to present and future anthropogenic warming. The response of Antarctic sea ice to global warming
M. Chadwick, M. Chadwick, C. S. Allen, L. C. Sime, X. Crosta, C.-D. Hillenbrand   +5 more
doaj   +1 more source

Sources of low-frequency variability in observed Antarctic sea ice [PDF]

The Cryosphere
Antarctic sea ice has exhibited significant variability over the satellite record, including a period of prolonged and gradual expansion, as well as a period of sudden decline.
D. B. Bonan, J. Dörr, J. Dörr, R. C. J. Wills, A. F. Thompson, M. Årthun, M. Årthun   +6 more
doaj   +1 more source

Synoptic mode of Antarctic summer sea ice superimposed on interannual and decadal variability

Advances in Climate Change Research, 2021
In contrast to decreased Arctic sea ice extent, Antarctic sea ice extent shows a somewhat increased trend. There is a large interannual variability of Antarctic sea ice, especially in the Pacific sector of the Southern Ocean.
Le-Jiang Yu, Shi-Yuan Zhong, Cui-Juan Sui, Zhao-Ru Zhang, Bo Sun   +4 more
doaj   +1 more source

An Overview of Antarctic Sea Ice in the Community Earth System Model Version 2, Part I: Analysis of the Seasonal Cycle in the Context of Sea Ice Thermodynamics and Coupled Atmosphere‐Ocean‐Ice Processes

Journal of Advances in Modeling Earth Systems, 2021
We assess Antarctic sea ice climatology and variability in version 2 of the Community Earth System Model (CESM2) and compare it to that in the older CESM1 and (where appropriate) real‐world observations.
Hansi K. A. Singh, Laura Landrum, Marika M. Holland, David A. Bailey, Alice K. DuVivier   +4 more
doaj   +1 more source

Impact of West Antarctic ice shelf melting on Southern Ocean hydrography [PDF]

The Cryosphere, 2020
Previous studies show accelerations of West Antarctic glaciers, implying that basal melt rates of these glaciers were previously small and increased in the middle of the 20th century. This enhanced melting is a likely source of the observed Ross Sea (RS)
Y. Nakayama, Y. Nakayama, R. Timmermann, H. H. Hellmer   +3 more
doaj   +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