Results 231 to 240 of about 91,538 (269)

Seasonal Change of Antarctic Sea Ice Cover

Science, 1975
The winter expansion of the sea ice surrounding Antarctica and the subsequent retreat of the ice in summer may be linked with the wind stress acting on the Southern Ocean in conjunction with the heat exchange in open water regions within the ice fields.
A L, Gordon, H W, Taylor
openaire   +2 more sources

Productivity of Microalgae in Antarctic Sea Ice

Science, 1965
Midsummer productivity of Antarctic microalgae, commonly occurring in brown sea ice along the west coast of the Palmer Peninsula, averaged more than 900 milligrams of carbon per cubic meter per hour, with an assimilation number of about 2.6. The rate of photosynthesis increased with light intensity to a maximum of about 18,000 lux, above which some ...
P R, Burkholder, E F, Mandelli
openaire   +2 more sources

Ambient noise under Antarctic sea ice

The Journal of the Acoustical Society of America, 1976
Underwater ambient noise spectra are described for data recorded during late spring conditions under the ice sheet in McMurdo Sound. The ambient noise was at all times marked by intense biological activity, but a diurnal component became apparent during a three-day recording period.
A. C. Kibblewhite, D. A. Jones
openaire   +1 more source

Dissolved carbohydrates in Antarctic sea ice

Antarctic Science, 2001
Concentrations of dissolved monocarbohydrates (MCHO) and polycarbohydrates (PCHO) were analysed in a variety of ice habitats from summer Weddell Sea sea ice (surface ponds, ice cores, gap layers and platelet ice). The dissolved organic carbon (DOC) pool in these habitats was also measured and the contribution of carbohydrate to this pool was assessed ...
Herborg L-M, Thomas DN, Kennedy H, Haas C, Dieckmann GS   +4 more
openaire   +2 more sources

Phytoplankton Blooms Under Antarctic Sea Ice

2021
Areas covered in compact sea ice are often assumed to prohibit upper ocean photosynthesis. Yet under-ice phytoplankton blooms (UIBs) have increasingly been observed in the Arctic, driven by changes...
Christopher Horvat, Kelsey M Bisson, Sarah Seabrook, Antonia Cristi, Lisa Matthes   +4 more
openaire   +1 more source

Mechanical Properties of Antarctic Sea Ice

Journal of Offshore Mechanics and Arctic Engineering, 1988
Abstract Ice samples were extracted from a land-fast ice sheet of 90 cm thickness at Lutzow-Holm Bay in the Antarctica. The ice samples were then shipped to a cold room in Tokyo, and unconfined uniaxial compression tests and fracture toughness tests were performed for a wide range of loading rate under temperature varying from −5°C to ...
N. Urabe, M. Inoue
openaire   +1 more source

Acoustic reflectivity of Antarctic sea ice

'Challenges of Our Changing Global Environment'. Conference Proceedings. OCEANS '95 MTS/IEEE, 2002
An Upward Looking Sonar (ULS) operating at 300 kHz has been built and deployed off the Antarctic coast during 1994 as part of the Australian climate related sea ice research program. The ULS was moored 150 m below the surface in water of 3 km depth and returned data spanning 11 months.
G. Bush, A. Duncan, J. Penrose, I. Allison   +3 more
openaire   +1 more source

The Antarctic Sea Ice Cover

1994
The sea ice cover in the Antarctic is one of the most climatically important features of the Southern Hemisphere. Its seasonal variation in extent is from 4 million km2 in summer (February) to 20 million km2 in winter (September) (Zwally et al. 1983).
openaire   +1 more source

Primary Production in Antarctic Sea Ice

Science, 1997
A numerical model shows that in Antarctic sea ice, increased flooding in regions with thick snow cover enhances primary production in the infiltration (surface) layer. Productivity in the freeboard (sea level) layer is also determined by sea ice porosity, which varies with temperature. Spatial and temporal variation in snow thickness and the proportion
, Arrigo, , Worthen, , Lizotte, , Dixon, , Dieckmann   +4 more
openaire   +2 more sources

Presentation: Modelling Antarctic Sea Ice

This is a presentation given to a meeting of analysts at the New Zealand Climate Change Commission on 23 May, 2024. The presenter is Dr Andrew Pauling, sea ice modeller at the University of Otago, who talks through the sea ice modelling research undertaken as part of the Deep South National Science Challenge | Te Kōmata o Te Tonga.
Pauling, A., Smith, I., Thomas, M., Mackie, S., Langhorne, P., Ridley, J., Martin, T., Stevens, D., The SOFIA Team   +8 more
openaire   +1 more source