Search

Publications matching your search query

Results 201 to 225 of 349

Modelling Antarctic sea ice thickness International Workshop on Antarctic Sea Ice Thickness. Program and Abstracts. Hobart, Australia 5-7 July 2006, 2006 (Ref: 12968)
Authors:
Lipscomb W.H.
Category 3: Abstract

I will review current efforts to model the Antarctic ice pack. Sea ice models in GCMs have … become more sophisticated in recent years; state-of-the-art models now include viscousplastic … dynamics, second-order-accurate advection, multilayer thermodynamics…

Antarctic sea ice thickness from space International Workshop on Antarctic Sea Ice Thickness, Program and Abstracts, Hobart, Australia 5-7 July 2006, 2006 (Ref: 12962)
Authors:
Laxon S.
Category 3: Abstract

Estimates of sea ice thickness around Antarctica are particularly sparse due to the … difficulty of accessing the continent (particularly during winter) and the lack of submarine … data. However recent measurements of ice or snow freeboard, from both space-borne radar … and laser…

Obstruction in the Bowels of the Southern Ocean - A Midwinter Special RHH, UTAS, HPH 2007 Grand Round, Hobart, 15 June 2007, 2007 (Ref: 12959)
Authors:
Fletcher L.Ayton J.Harle R.
Category 3: Verbal presentation

Changes in the Antarctic sea ice ecosystem: potential effects on krill and baleen whales Paper SC/59/E8 presented to the IWC Scientific Committee, May 2007 (unpublished), 2007 (Ref: 12956)
Authors:
Nicol S.Worby A.Leaper R.
Category 2: International meeting papers

The area surrounding the Antarctic that is annually covered by sea ice is one of the most conspicuous and well-defined oceanic … regions on the planet. In winter, 19 million km2 are ice-covered and in summer only 4 million km2 of sea ice remains.

The Long Term Trend and Solar Cycle Variation Observed in 12 years of Hydroxyl Temperatures Over Davis, Antarctica American Geophysical Union 2007 Joint Assembly. Acapulco, Mexico 21-25 May 2007, 2007 (Ref: 12936)
Authors:
French J.Burns G.
Category 3: Poster

AB: Hydroxyl (6-2)-band rotational temperature observations have been accumulated at Davis station, Antarctica (68°S, 78°E) over 12 consecutive years since 1995.

Simulated light regimes affect feeding and metabolism of Antarctic krill, Euphausia superba Limnol. Oceanogr., 2007 (Ref: 12940)
Authors:
Teschke M.Kawaguchi S.Meyer B.
Category 1: Peer-reviewed literature

The effect of different light regimes on physiological parameters (feeding activity, oxygen consumption, and … activity of the metabolic enzyme malate dehydrogenase [MDH]) of Antarctic krill, Euphausia superba, was studied … over 12 weeks under laboratory conditions.

Weddell seal underwater calling rates during the Winter and Spring near Mawson Station, Antarctica Marine Mammal Science, 2007 (Ref: 12921)
Authors:
Rouget P.A.Terhune J.M.Burton H.R.
Category 1: Peer-reviewed literature

Underwater vocalization monitoring and surveys, both on ice and underwater were used to determine if Weddell seals( Leptonychotews eddellit)n ear Mawson Station, Antarctica, remain under the fast ice during winter within close range of breeding … sites.

Differential resource allocation strategies in juvenile elephant seals in the highly seasonal Southern Ocean Marine Ecology Progress Series, 2007 (Ref: 12920)
Authors:
Field I.C.Bradshaw C.J.A.Burton H.R.Hindell M.A.
Category 1: Peer-reviewed literature

ABSTRACT: Environmental conditions experienced in early life affect growth and influence life history … strategies, especially in seasonal environments.

Huddling behavior in emperor penguins: Dynamics of huddling. Physiology & Behavior, 2006 (Ref: 12712)
Authors:
Gilbert C.Robertson G.Le Maho Y.Natio Y.Ancel A.
Category 1: Peer-reviewed literature

Although huddling was shown to be the key by which emperor penguins (Aptenodytes forsteri) save energy and sustain their breeding fast … during the Antarctic winter, the intricacies of this social behavior have been poorly studied.

Pathfinder for an international large optical telescope. EAS Publications Series (Dome C Astronomy and Astrophysics Meeting, Toulouse, July 2004), 2004 (Ref: 12316)
Authors:
Lawrence J.S.Burton M.G.Ashley M.C.B.Storey J.W.V.
Category 3: Conference paper

PILOT (Pathfnder for an International Large Optical Tele- … scope) is a proposed 2 m class optical/infrared telescope to be sited … at Dome C on the Antarctic plateau. Recent site testing results from … Dome C have shown remarkable ground level seeing, a large isoplanatic … angle…

Seasonal variations of the boundary layer turbulence at Dome C. EAS Publications Series (Dome C Astronomy and Astrophysics Meeting, Toulouse, July 2004), 2004 (Ref: 12314)
Authors:
Travouillon T.
Category 3: Conference paper

Abstract. The atmospheric boundary layer contribution to the total … seeing at Dome C is presented in this paper. With a mean of 0.0700, this … is one of the most stable boundary layer encountered.

Safer to be dry - desiccation protects Antarctic mosses from UV-B induced DNA damage American Society of Plant Biologists, 2006 (Ref: 12888)
Authors:
Robinson S.A.Turnbull J.D.Leslie S.
Category 3: Abstract

Growth conditions in Antarctica are extreme, and the few plants that can … grow there are exposed to a highly seasonal, rapidly variable and often … extreme climate. In recent decades, these plants have also been exposed to … increased levels of UV-B radiation (UV-BR)…

Antarctica: Medicine in an extreme environment Australasian College for Emergency Medicine 2006 Winter Symposium - 29 June to 2 July 2006, Townsville, 2006 (Ref: 12869)
Authors:
Merfield E.
Category 3: Verbal presentation

Antarctic sea-ice velocity as derived from SSM/I imagery Annals of Glaciology, 2006 (Ref: 12849)
Authors:
Heil P.Fowler C.W.Lake S.E.
Category 1: Peer-reviewed literature

Sea-ice velocities derived from remotely sensed microwave imagery of the Special Sensor … Microwave/Imager (SSM/I) have been analyzed for changes over time in Antarctic sea-ice velocity, for … the period 1988–2004.

Meteor radar temperatures estimation using the Davis MST and meteor radars. Proceedings of MST11: Eleventh International Workshop on Technical & Scientific Aspects of MST radar, Gadanki/Tirupati, India, 11-15 December 2006, 2006 (Ref: 12784)
Authors:
Holdsworth D.A.Reid I.M.Murphy D.J.Morris R.J.
Category 3: Abstract

This paper presents the meteor temperatures estimated using two radars installed … in Davis (69 deg S, 78 deg E), Antarctica. The Davis MST radar was installed in … February 2003, primarily for observation of polar mesosphere summer echoes…

Deglacial paleoceanographic history of the Bay of Plenty, New Zealand. Paleoceanography, 2005 (Ref: 12720)
Authors:
Samson C.R.Sikes E.L.Howard W.R.
Category 1: Peer-reviewed literature

We present sea surface temperature (SST) records with centennial-scale resolution from the Bay of Plenty, north of New Zealand. Foraminiferal assemblage-based paleo-SST estimates provide a deglacial record of SST … since 16.5 14C ka. Average Holocene SSTs are 15.6C for winter and 20.3C for summer…

Nitrogen isotope constraints on subantarctic biogeochemistry. Journal of Geophysical Research, 2006 (Ref: 12708)
Authors:
DiFiore P.J.Sigman M.Trull T.W.Lourey M.J.Karsh K.Cane G.Ho R.
Category 1: Peer-reviewed literature

We report nitrate (NO3) nitrogen isotope ratios for seawater samples collected in the … Subantarctic Zone of the Southern Ocean during both winter and summer as part of the … Australian Antarctic CRC Subantarctic Zone (SAZ) Project.

Watching moss grow: radiocarbon reveals growth rate of Antarctic mosses. Abstracts of the SCAR Open Science Conference, Hobart, 12-14 July 2006., 2006 (Ref: 12836)
Authors:
Clarke L.J.Robinson S.A.Hua Q.Fink D.
Category 3: Abstract

Antarctica is both the coldest and most arid continent on Earth, and experiences continuous … light in midsummer and continuous darkness in midwinter. These factors reduce the growth … rate of the continental Antarctic flora (mosses, lichens and algae) to a minimum.

The first bipolar seasonal investigation of the PMSE layer near the latitude 69° as a function of mesosphere temperature and wind state. Proceedings of MST11: Eleventh International Workshop on Technical & Scientific Aspects of MST radar, Gadanki/Tirupati, India, 11-15 December 2006, 2006 (Ref: 12782)
Authors:
Morris R.J.Murphy D.J.Klekociuk A.R.Latteck R.Singer W.Holdsworth D.A.
Category 3: Abstract

The existence of Polar Mesosphere Summer Echoes (PMSE) in the Southern … Hemisphere (SH) has been confirmed using MST radar, HF radar and a Dynasonde. Studies spanned the geographic latitudes 62.1°S (Machu Picchu), 68.6°S (Davis), 69.0°S (Syowa), and 75.5°S (Halley Bay).

A climatology of tides in the Antarctic mesosphere and lower thermosphere. Journal of Geophysical Research, 2006 (Ref: 12773)
Authors:
Murphy D.J.Forbes J.M.Waterscheid R.L.Hagan M.E.Avery S.K.Aso T.Fraser G.J.Fritts D.C.Jarvis M.J.McDonald A.J.Riggin D.M.Tsutsumi M.Vincent R.A.
Category 1: Peer-reviewed literature

A function that approximates atmospheric tidal behavior in the polar regions is … described.

Planetary wave and gravity wave influence on the occurrence of polar stratospheric clouds over Davis Station, Antarctica, seen in lidar and radiosonde observations. Journal of Geophysical Research., 2006 (Ref: 12739)
Authors:
Innis J.L.Klekociuk A.R.
Category 1: Peer-reviewed literature

We present Rayleigh lidar observations of polar stratospheric clouds (PSC) from … Davis Station (68.6S, 78.0E), Antarctica, from the 2001, 2002, 2003, and 2004 austral … winter seasons. The PSC are detected as enhanced backscatter returns at lower … stratospheric heights.

Large-scale vertical momentum, kinetic energy and moisture fluxes in the Antarctic sea-ice region. Boundary-Layer Meteorology, 2005 (Ref: 12671)
Authors:
Simmonds I.Rafter A.Cowan T.Watkins A.B.Keay K.
Category 1: Peer-reviewed literature

There are very strong thermal gradients between the Antarctic continent and the … sea-ice zone, and between that zone and the ocean to the north. As a result of these contrasts … the sea-ice domain is one of strong cyclogenesis and high cyclone frequency.

Insignificant change in Antarctic snowfall since the International Geophysical Year. Science, 2006 (Ref: 12647)
Authors:
Monaghan A.J.Bromwich D.H.Fogt R.L.Wang S.-H.Mayewski P.A.Dixon D.A.Ekaykin A.Frezzotti M.Goodwin I.Isaksson E.Kaspari D.Morgan V.I.Oerter H.Van Ommen T.D.Van der Veen C.J.Wen J.
Category 1: Peer-reviewed literature

Antarctic snowfall exhibits substantial variability over a range of time scales, with consequent … impacts on global sea level and the mass balance of the ice sheets. To assess how snowfall has … affected the thickness of the ice sheets in Antarctica and to provide an extended perspective…

Nutrient supply and uptake in the Subantarctic mixed layer: Constraints from the isotopes of nitrate. Eos Transactions AGU, Ocean Sciences Meeting Supplement., 2006 (Ref: 12617)
Authors:
DiFiore P.J.Sigman D.Trull T.Lourey M.Karsh K.
Category 3: Abstract

The isotopes of nitrate, which show different dynamics than nitrate concentration during physical transport and nitrate assimilation, provide a complementary constraint in the effort to understand nutrient transport and biogeochemical fluxes in the Southern Ocean. For instance…

Upper ocean variability in carbon dioxide, south of Australia. Abstracts from the SCAR Open Science Conference, Hobart, 12-14 July 2006., 2006 (Ref: 12598)
Authors:
Tilbrook B.Lenton A.Pretty M.
Category 3: Abstract

Surface carbon dioxide (CO2) observations are integral to understanding the role of the … Southern Ocean in the global carbon cycle, and to developing reliable predictions of … biogeochemical responses to altered climatic conditions. Carbon dioxide (CO2)…

on