Results 81 to 90 of about 91,538 (269)

Polar‐low track prediction using machine‐learning methods

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Machine‐learning models are developed to produce reliable and efficient forecasts of polar‐low (PL) trajectories 12 hours ahead. A temporal model (RLSTM) benefiting from the rolling‐forecast strategy, improves overall prediction accuracy and is suitable for quick experimentation, while a spatiotemporal model (PL‐UNet), incorporating both historical and
Ziying Yang, Rune Grand Graversen, Filippo Maria Bianchi, Jiping Liu, Ruibo Lei   +4 more
wiley   +1 more source

Last Interglacial subsurface warming on the Antarctic shelf triggered by reduced deep-ocean convection

Communications Earth & Environment
The Antarctic ice-sheet could have contributed 3 to 5 m sea-level equivalent to the Last Interglacial sea-level highstand. Such an Antarctic ice-mass loss compared to pre-industrial requires a subsurface warming on the Antarctic shelf of ~ 3 °C according
Nicholas King-Hei Yeung, Laurie Menviel, Katrin J. Meissner, Dipayan Choudhury, Tilo Ziehn, Matthew A. Chamberlain   +5 more
doaj   +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

The Association of Antarctic Sea Ice with the Subantarctic Mode and Antarctic Intermediate Waters during the Last Deglaciation

Proceedings, 2023
The Southern Ocean waters exchange freshwater, nutrients, carbon, heat, and salt to the Equator and influence the global carbon budget. Therefore, it is essential to understand the variations in Southern Ocean circulation during the last deglacial period
Gagan Mandal, Shih-Yu Lee, Jia-Yuh Yu
doaj   +1 more source

Stratospheric and tropospheric seasonality and its implications for observation requirements in numerical weather prediction

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Daily time series of zonal‐mean zonal wind (m·s−1) at 10 hPa and 60° N from 1950 to 2021 from the ERA5 reanalysis. This shows huge variability in some seasons and very little in others. We provide evidence that high‐level observations, radiosonde and satellite, are more important during the extended winter season with its very large variability ...
Bruce Ingleby, Inna Polichtchouk
wiley   +1 more source

A Bayesian Model for 20th Century Antarctic Sea Ice Extent Reconstruction

Earth and Space Science
Antarctic sea ice, a key component in the complex Antarctic climate system, is an important driver and indicator of the global climate. In the relatively short satellite‐observed period from 1979 to 2022 the sea ice extent has continuously increased ...
T. J. Maierhofer, M. N. Raphael, R. L. Fogt, M. S. Handcock   +3 more
doaj   +1 more source

Report of the night session "Progress in Research into Sea Ice Biota of the Antarctic Ocean" presented at the Spring Meeting of the Oceanographic Society of Japan, 2015

Antarctic Record, 2015
The workshop "Progress in Research into Sea Ice Biota of the Antarctic Ocean" was held on 24 March 2015 at Tokyo University of Marine Science and Technology (TUMSAT) as a night session under the joint sponsorship of the Oceanographic Society of Japan ...
Atsushi Tanimura, Noriaki Kimura, Naho Miyazaki, Motoha Ojima, Masato Moteki, Tsuneo Odate   +5 more
doaj   +1 more source

Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 [PDF]

, 2018
Warmer than present Antarctic and Southern Ocean temperatures during the last interglacial, approximately 128,000 years ago, have been attributed to changes in north‐south ocean heat transport, causing opposing hemispheric temperature anomalies.
Bakker, Blisniuk, Bond, Bradley, Broecker, Capron, Capron, Clark, Duplessy, EPICA Community Members, Ferguson, Govin, Govin, Hansen, Hill, Hoffman, Holden, Holloway, Holloway, Holloway, Jouzel, Joy S. Singarayer, Julia C. Tindall, Kawamura, Levitus, Louise C. Sime, Lunt, Marino, Masson-Delmotte, Masson-Delmotte, Max D. Holloway, McGregor, Otto-Bliesner, Paul J. Valdes, Peltier, Peltier, Petit, Poage, Sime, Sime, Stenni, Stocker, Stone, Stouffer, Tindall, WAIS Divide Project Members, WAIS Divide Project Members, Yin   +47 more
core   +4 more sources

A multimodel intercomparison study of variable‐resolution global models with grid refinement over the Arctic and Antarctic

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We document the protocol and first results from the first ever coordinated multimodel variable‐resolution experiment set with refinement over the polar regions. We find that the refinement generally yields model‐dependent effects. The most consistent improvement is an amelioration of the upper‐level cold bias in the polar regions that translates into ...
Lise Seland Graff, Dörthe Handorf, Raphael Köhler, Xavier Levine, René R. Wijngaard, Gareth J. Marshall, Alexey Yu. Karpechko, Ryan S. Williams, Priscilla A. Mooney   +8 more
wiley   +1 more source

Modeling the oxygen isotope composition of the Antarctic ice sheet and its significance to Pliocene sea leve [PDF]

, 2016
Recent estimates of global mean sea level based on the oxygen isotope composition of mid-Pliocene benthic foraminifera vary from 9 to 21 m above present, which has differing implications for the past stability of the Antarctic ice sheet during an ...
David Pollard, DeConto, Edward Gasson, Langebroek, Raymo, Robert M. DeConto   +5 more
core   +1 more source