Results 81 to 90 of about 471,351 (368)

Observed Concentration Budgets of Arctic and Antarctic Sea Ice

Journal of Climate, 2016
Abstract In recent decades, Antarctic sea ice has expanded slightly while Arctic sea ice has contracted dramatically. The anthropogenic contribution to these changes cannot be fully assessed unless climate models are able to reproduce them.
Holland, Paul R., Kimura, Noriaki
openaire   +2 more sources

Record low 2022 Antarctic sea ice led to catastrophic breeding failure of emperor penguins

Communications Earth & Environment, 2023
The spring season of 2022 saw record low sea ice extent in Antarctica that persisted throughout the year. At the beginning of December, the Antarctic sea ice extent was tracking with the all-time low set in 2021. The greatest regional negative anomaly of
P. Fretwell, A. Boutet, N. Ratcliffe
semanticscholar   +1 more source

Loss of sea ice during winter north of Svalbard [PDF]

, 2014
Sea ice loss in the Arctic Ocean has up to now been strongest during summer. In contrast, the sea ice concentration north of Svalbard has experienced a larger decline during winter since 1979. The trend in winter ice area loss is close to 10% per decade,
Aagaard K., Alexeev V. A., Beszczynska-Möller A., Cokelet E., Comiso J. C, Dee D. P., Frank Nilsen, Førland E. J., Førland E. J., Grotefendt K., Hansen E., Ingrid H. Onarheim, Ivanov V. V., Lars H. Smedsrud, Lind S., Piechura J., Polyakov I. V., Polyakov I. V., Quenouille M. H, Rainville L., Randi B. Ingvaldsen, Rudels B, Rudels B, Saloranta T. M., Sandø A. B., Schauer U., Sirevaag A., Smedsrud L. H., Untersteiner N, Årthun M.   +29 more
core   +1 more source

Navigability of the Northern Sea Route for Arc7 ice-class vessels during winter and spring sea-ice conditions

Advances in Climate Change Research, 2022
Sea ice hinders the navigability of the Arctic, especially in winter and spring. However, three Arc7 ice-class Liquefied Natural Gas carrying vessels safely transited the Northern Sea Route (NSR) without icebreaker assistance in January 2021.
Shi-Yi CHEN, Stefan Kern, Xin-Qing LI, Feng-Ming HUI, Yu-Fang YE, Xiao Cheng   +5 more
doaj   +1 more source

Holocene carbon-cycle dynamics based on CO2 trapped in ice at Taylor Dome, Antarctica [PDF]

, 1999
A high-resolution ice-core record of atmospheric CO2 concentration over the Holocene epoch shows that the global carbon cycle has not been in steady state during the past 11,000 years.
Blunier, T., Deck, B., Fischer, Hubertus, Indermühle, A., Joos, F., Mastroianni, D., Meyer, R., Smith, J., Stauffer, B., Stocker, T. F., Tschumi, J., Wahlen, M.   +11 more
core   +1 more source

Sea Ice Concentration and Sea Ice Extent Mapping with the Fsscat Mission: A Neural Network Approach

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
2021 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 11-16 July 2021, Brussels, Belgium.-- 4 pages, 4 figures Knowledge about sea ice concentration and extent in polar regions is of great interest both for economic interests, and as a proxy of the climate change.
Llaveria, David, Muñoz-Martín, Joan Francesc, Herbert, Christoph, Pablos, Miriam, Camps, Adriano, Park, Hyuk   +5 more
openaire   +2 more sources

Direct determination of the air-sea CO₂ gas transfer velocity in Arctic sea-ice regions [PDF]

, 2017
The Arctic Ocean is an important sink for atmospheric CO₂. The impact of decreasing sea-ice extent and expanding marginal ice zones on Arctic air-sea CO₂ exchange depends on the rate of gas transfer in the presence of sea ice.
Anderson, LG, Brooks, IM, Crill, PM, Geibel, MC, Humborg, C, Prytherch, J, Salisbury, DJ, Thornton, BF, Tjernström, M   +8 more
core   +1 more source

Rad27/FEN1 prevents accumulation of Okazaki fragments and ribosomal DNA copy number changes

FEBS Letters, EarlyView.
The budding yeast Rad27 is a structure‐specific endonuclease. Here, the authors reveal that Rad27 is crucial for maintaining the stability of the ribosomal RNA gene (rDNA) region. Rad27 deficiency leads to the accumulation of Okazaki fragments and changes in rDNA copy number.
Tsugumi Yamaji, Yuko Katayama, Nanase Arata, Mariko Sasaki   +3 more
wiley   +1 more source

Satellite Observation of Sea Ice Concentration Based on Chinese HY-1C/D Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The increasingly significant global warming has severely affected the Arctic region. The melting speed of sea ice is accelerating, and its spatial coverage is gradually shrinking, causing a series of ecological problems that cannot be ignored. Therefore,
Li Xu, Yiming Chen, Deyong Sun, Shengqiang Wang, Lijian Shi, Muhammad Bilal, Yongjun Jia, Shuyan Lang, Bin Zou   +8 more
doaj   +1 more source

Improving short-term sea ice concentration forecasts using deep learning [PDF]

The Cryosphere
Reliable short-term sea ice forecasts are needed to support maritime operations in polar regions. While sea ice forecasts produced by physically based models still have limited accuracy, statistical post-processing techniques can be applied to reduce ...
C. Palerme, T. Lavergne, J. Rusin, A. Melsom, J. Brajard, A. F. Kvanum, A. F. Kvanum, A. Macdonald Sørensen, L. Bertino, M. Müller, M. Müller   +10 more
doaj   +1 more source