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A new all-sky imaging Fabry-Perot spectrometer … has been installed at Mawson station (67360 S, 62520 E), Antarctica. This instrument is capable of recording independent … spectra from many tens of locations across the sky simultaneously. Useful operation began in March 2007…
A local scale, time dependent three-dimensional … model of the neutral thermosphere was used to test the applicability … of two previously published empirical relations between … thermospheric vertical wind and velocity divergence, i.e., those due to Burnside et al. (1981) and Brekke (1997).
Temperature data from the COSMIC GPS-RO … satellite constellation are used to study the distribution and … variability of planetary wave activity in the low to midstratosphere … (15–40 km) of the Arctic and Antarctic from … September 2006 until March 2009.
With the development of next generation aircraft designs capable of ultralong-range flight and … extended flight endurance…
Recent model calculations have attempted to quantify the contribution of … major energetic solar cosmic ray (SCR) events to 10Be production.1,2 In this … study we compare modeled 10Be production by SCR events to measured … 10Be concentrations in a Law Dome snow pit record.
The remediation of the Thala Valley landfill, Casey Station, East Antarctica, is part of efforts to … clean-up contaminated sites associated with the Australian Antarctic Program. These sites, ranging from abandoned rubbish dumps to fuel spills…
Sub-ice shelf bathymetry remains a poorly known but important boundary condition for … models of sub-ice shelf circulation and the distribution of basal melt and accretion. Surfacebased … seismic surveys are traditionally used to determine sub-ice shelf bathymetry…
The oxygen (O2) concentration in the surface ocean is influenced by biological and physical processes. With concurrent measurements of argon (Ar), which has similar solubility properties as oxygen…
We conducted a scanning electron microscopic survey of morphological variations in the … calcareous nanoplankton species Emiliania huxleyi in Southern Ocean surface water samples … collected along a transect from 43 to 64° S and 141 to 145° E during November 2001, October to … February 2002/2003…
We present measurements and analysis of the isotopic composition (ä15Nbulk, ä15Ná, ä15Nâ, and ä18O) of nitrous oxide in 50 samples of tropospheric air collected at Cape Grim, Tasmania between 1978 and 2005 and in 11 samples of firn air from Law Dome, Antarctica…
Preliminary results are presented from the first validation of geophysical data products (ice concentration, snow thickness on sea ice (hs) and ice temperature (TI ) from the NASA EOS Aqua AMSRE sensor, in East Antarctica (in September–October 2003).
Measurements of the microwave backscatter from the Antarctic ice sheet have been obtained by the single-sided, right-looking, C-band wind scatterometer carried by the ERS-1 and 2 satellites and by the dual-sided, ku-band NSCAT instrument on ADEOS.
Supervised dive classification is a commonly used technique for categorising time-depth profiles of diving … vertebrates. Such analyses permit the description and quantification of dive behaviour and foraging tactics, and highlight feeding locations. Ideally…
Recently, Vergani et al. (2008) examined the … climatic drivers of population dynamics … (weaning mass) and foraging performance … (diet variation) from southern elephant … seals, Mirounga leonina, in the Atlantic sector … of the Southern Ocean.
Accurate measurement of fundamental parameters, such as temperature, density and composition, through the whole atmosphere and over long time scales is vitally important to identify and quantify changes in the earths climate, whether natural or anthropogenic.
We have developed a method for determining interplanetary coronal mass ejection … (ICME) geometry from galactic cosmic ray data recorded by the ground-based muon … detector network. The cosmic ray density depression inside the ICME, which is associated … with a Forbush decrease…
The temporal evolution of the subauroral polarization stream (SAPS) is investigated … using the Doppler velocity observations by the Unwin HF radar in conjunction with … the simultaneously observed auroral luminosity and plasma convection reversal regions. The event under study of 14 December 2004…
The dual Tasman International Geospace Environment … Radar (TIGER) HF radars regularly observe E-region … echoes at sub-auroral magnetic latitudes 58–60 S including … during geomagnetic storms. We present a statistical analysis … of E-region backscatter observed in a period of 2 years …
We present a statistical analysis of short-range E region echoes observed by the Super … Dual Auroral Radar Network (SuperDARN) HF radars in the evening sector (16–22 … MLT) over 3 years. Significant populations of the high-velocity (350–450 m/s)…
The spatio-temporal variability in the upwelling of iron-rich Upper Circumpolar Deep Water (UCDW) is thought to have a significant impact on primary production in the Southern Ocean, since iron has been shown to be a limiting nutrient in an otherwise high nutrient region.
It is generally accepted that surface freshwater … anomalies in the Southern Ocean drive increases in North … Atlantic Deep Water (NADW) formation via a bipolar … density see-saw. We find that a Southern Ocean freshwater … pulse of comparable magnitude to meltwater pulse 1A, shuts down…