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The polar upper atmosphere is receiving increasing interest as a natural laboratory to investigate processes and phenomena under extreme conditions, and to detect atmospheric change. During summer, temperatures in the high-latitude mesopause region (80–95 km altitude)…
Results of ongoing investigations into patterns of interannual variability in total column ozone as measured by the Bureau of Meteorology’s Dobson network over the Australian region are presented. At all latitudes, total column ozone increases during winter and spring…
Analysis of zonal anomalies in total ozone and thermal tropopause height shows … that ozone depletion during austral spring has a strong influence on the height … and sharpness of the tropopause over West Antarctica. The seasonal change of tropopause … peak height occurs between 9 km…
Bacteria play a key role in the world’s oceans, supporting nutrient remineralisation and … mediating carbon transfer. Little is known about annual changes in bacterial concentration, production … and metabolism during the extreme seasonal changes in biological productivity in Antarctic … waters.
Despite being a major pathway for carbon flow in aquatic systems, little is known about … annual changes in microzooplankton grazing in Antarctic waters and its top-down control of phytoplankton.
The relationship between Ade´ lie Penguins (Pygoscelis adeliae) and ice is well … established, with sea ice influencing penguin populations through a variety of processes … operating at different spatial and temporal scales.
Planetary waves with periods between two and four days in the middle atmosphere over … Antarctica are characterized using one year of data from the medium-frequency spaced … antenna (MFSA) radars at Scott Base, Rothera, and Davis. In order to investigate the origin … of the observed waves…
Law Dome, in coastal East Antarctica, is a relatively low-latitude site (6646S) with a strong maritime … climate, dominated by cyclonic precipitation which produces high snow accumulation rates and very … well-resolved ice core records.
Ice cores from Law Dome, in coastal East Antarctica, provide climate records that have strong connections to … the Southern Ocean and mid-latitude climate in the … Australian region. The overall climate history available from … Law Dome extends back for tens of millennia…
We describe the circulation and seasonal development of the upper ocean … in the Seasonal Ice Zone (SIZ) of the Southern Ocean along 140°E. The 140°E section … was repeated four times between November 2001 and March 2002, spanning the period … from early spring to autumn.
The eVect of diVerent light regimes on the … development of sexual maturity and body composition … (carbon, nitrogen, lipid and protein) of Antarctic krill, Euphausia … superba, was studied over 12 weeks under laboratory … conditions.
[1] In September–October 2005, the juxtaposition of low- and high-pressure anomalies at … 130W and 60W, respectively, created strong and persistent northerly airflow across the … West Antarctic Peninsula (WAP). This had a major impact on regional sea ice conditions…
[1] Nine years (1997 to 2005) of nighttime hydroxyl (6-2) band rotational temperatures … were measured with a scanning spectrometer over Davis station, Antarctica (68.6S, 78.0E). A novel time series analysis technique is employed to create continuous longterm … time series…
Fast ice makes up about 10 % by area (or 14 - 20 % by volume) of the total … Antarctic pack. Its growth is largely determined by thermodynamics processes, which makes it a valuable tool to monitor changes in the polar climate system. Time series of fast-ice properties…
Ozone climatologies are presented for a number of locations in the Australian region, making use of … both total ozone and ozone profile data, as measured by the Bureau of Meteorology’s Dobson and … ozonesonde networks. For mid-latitude sites (Melbourne and Macquarie Island)…
Understanding and characterising the variability of ozone in the lower atmosphere is a key aspect of … regional and global climate assessment. Tropospheric ozone influences climate by absorbing outgoing … longwave terrestrial radiation, thereby acting as a greenhouse gas…
Information of sea-ice drift is crucial to understand the East Antarctic climate system, and knowledge of sea-ice dynamics is needed to fully explore the effects of cryospheric changes on the ecosystems within the Antarctic pack-ice zone. Satellite-derived sea-ice data cover the Southern Ocean.
Profiling the ground layer turbulence for daytime seeing applications using an array of photodiodes has been documented … in literature, in particular by Beckers who coined the term “SHABAR” for the instrument, short for Shadow Band … Ranger.
[1] The relationship between the production of dimethylsulfide (DMS) in the upper … ocean and atmospheric sulfate aerosols has been confirmed through local shipboard … measurements, and global modeling studies alike.
Abstract We examined the incidence of extreme … diving in a 3-year overwintering study of emperor … penguins Aptenodytes forsteri in East Antarctica. We … defined extreme dives as very deep (> 400 m) and/or … very long (> 12 min).
Fan-Beam and Pencil-Beam Radar Scaterrometers on many satellites in polar orbits, e.g. ERS-1/2, ADEOS-1/2 and QuikSCAT, have been designed primarily for estimation of vector winds over the … global oceans. However, these scatterometers…
A study of the variation in snow cover and depth over the Antarctic sea ice zone was … performed using AMSR-E/Aqua snow depth and sea ice temperature products of … approximate 5-day intervals from June 2002 through December 2005. Time series statistic … analyses of mean and maximum snow depth…
Long-range forecasts of Antarctic sea ice are tery much in demand, not only because of … the potential importance of sea ice in global climate, but also for the practical purpose of … exploring the Antarctic continent. Unfortunately…