Search

The article presents a study which characterizes the glacial conditions at Halvfarryggen ice dome in Dronning Maud Land, Antarctica. It explores the potential drill site for the International Partnerships in Ice Core Sciences with specific atmospheric conditions, surface topography, and ice stratigraphy from radar data. It details the comprehensive approach in field data, remote sensing, and anisotropic ice-flow model in characterization of glacial conditions. The study suggests drilling into the apices of the deep anticlines for record length and temporal resolution.

The article presents a study which investigates on the use of radar diagnosis to determine the subglacial condition in Dronning Maud Land in East Antarctica. The study was performed to three ground-based and pulse-modulated radar sounders, wherein two radar sounders have a centre frequency of 179MHz. The study shows that returned power decreases in the area as ice becomes thicker.

Abstract: The preferential altitude of transport of continental tracers towards Antarctica under present and Last Glacial Maximum (21kyr BP) conditions is analysed using an atmospheric general circulation model with idealized tracers which are emitted at the surface of Australia and South America. It is shown that the difference between the preferential transport altitude of Australian and South American tracers is similar in glacial and interglacial climates. Australian tracers arriving in Antarctica are consistently transported at higher altitudes than tracers emitted in South America. The frequency of low-level transport is stronger at the LGM than at present, reflecting a more vigorous atmospheric circulation at the LGM as a consequence of increased baroclinicity. While the spatial patterns of the total tracer concentrations at the Antarctic surface differ for Australian and South American tracers, with the regions of maximum surface concentration being located to the south-east of the respective tracer sources, the spatial distribution of the part advected via upper atmospheric levels is very similar for the Australian and South American tracers, with a maximum over Queen Maud Land. The simulated changes in transport characteristics cannot explain observed glacial to interglacial variations of dust size spectra which have been interpreted as indicators of the relative intensity of upper and lower level atmospheric dust transport to Antarctica. [Copyright &y& Elsevier]