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Results 4226 to 4250 of 13317
We present colour-colour and colour-magnitude diagrams for RCW 57 (NGC … 3576) based on L-band data at 3.5 ìm taken with SPIREX (South Pole Infrared Explorer), and 2MASS JHKs data at 1.25-2.2 ìm. A total of 251 sources were detected.
The Super Dual Auroral Radar Network (SuperDARN) is an international network of oblique HF over-the-horizon … radars dedicated to the study of high latitude magnetosphere-ionosphere convection. In scientific terms, they have been … an outstanding success…
Airborne, ship-borne and surface low-frequency electromagnetic (EM) methods have … become widely applied to measure sea-ice thickness. EM responses measured over sea ice depend … mainly on the sea-water conductivity and on the height of the sensor above the sea-ice–sea-water … interface…
Bacteria play a key role in the world's oceans, supporting nutrient remineratlisation and mediating … carbon transfer. Most studies of marine bacteria in the … Southern Ocean are restricted to the summer months. Thus…
The invertebrate fauna of many Antarctic … ice-free areas, even those close to permanent research … stations, can be poorly known. Here we describe some … nematodes from freshwater and saline, marine-derived … lakes of the Vestfold Hills, East Antarctica.
Antarctic coastal polynyas are major areas of intense ocean–atmosphere heat and moisture … flux, and associated high sea-ice production and dense-water formation. Their accurate detection, including an estimate of thin ice thickness, is therefore very important. In this paper…
Although satellite passive-microwave remote sensing is the main source of global sea-ice … information, the data products have never been adequately validated for East Antarctic … conditions.
Ship-borne and airborne infrared radiometric measurements during the ARISE cruise of September–October 2003 permitted in situ validation studies of two satellite-based ice surface skin temperature algorithms:
This paper outlines work at La Trobe University on the development of a “fully digital” radar for space weather … investigations. The new radar will enhance the existing Tasman International Geospace Environment Radar … (TIGER) that probes beyond the horizon…
Abstract: During much of 2001 and 2002, spectral … irradiance measurements of solar ultraviolet radiation … (UVR) were made in Melbourne by both the Australian … Radiation Protection and Nuclear Safety Agency … (ARPANSA) and the Bureau of Meteorology (BOM).
At 08:35 UT on 21 November 2004, the onset of … an interval of substorm activity was captured in the southern … hemisphere by the Far UltraViolet (FUV) instrument on … board the IMAGE spacecraft. This was accompanied by … the onset of Pi2 activity and subsequent magnetic bays…
Akasofu’s solar wind " parameter describes the … coupling of solar wind energy to the magnetosphere and … ionosphere. Analysis of fluctuations in " using model independent … scaling techniques including the peaks of probability … density functions (PDFs)…
There are a range of chemical contaminants of concern in Antarctic marine environments as a … result of the activities of humans, including past waste disposal practices and accidental fuel … spills. Environmental guidelines for contaminants, including targets for contaminated site … remediation…
Super Dual Auroral Radar Network (SuperDARN) HF backscatter radaras scan 16 beam directions over a field of view of ~52°. In the common mode of operation, data is collected using 45-km range gates and 7-s integrations on each beam.