Crystallization and Degassing in the Basement Sill, McMurdo Dry Valleys, Antarctica
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چکیده
منابع مشابه
Accelerated thermokarst formation in the McMurdo Dry Valleys, Antarctica
Thermokarst is a land surface lowered and disrupted by melting ground ice. Thermokarst is a major driver of landscape change in the Arctic, but has been considered to be a minor process in Antarctica. Here, we use ground-based and airborne LiDAR coupled with timelapse imaging and meteorological data to show that 1) thermokarst formation has accelerated in Garwood Valley, Antarctica; 2) the rate...
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Archaea are the least understood members of the microbial community in Antarctic mineral soils. Although their occurrence in Antarctic coastal soils has been previously documented, little is known about their distribution in soils across the McMurdo Dry Valleys, Victoria Land. In this study, terminal-restriction fragment length polymorphism (t-RFLP) analysis and 454 pyrosequencing were coupled ...
متن کاملQuantifying sulfate components and their variations in soils of the McMurdo Dry Valleys, Antarctica
[1] Many soils of the McMurdo Dry Valleys (MDV), Antarctica, being old, hyperarid, and frigid, have accumulated abundant atmospheric salts over the last several million years. This salt repository offers an opportunity to study atmospheric chemistry (past and present), the origin and transport of ions in soils, the weathering activity of soils, and postdepositional soil-leaching processes withi...
متن کاملPerchlorate and chlorate biogeochemistry in ice-covered lakes of the McMurdo Dry Valleys, Antarctica
We measured chlorate (ClO3 ) and perchlorate (ClO4 ) concentrations in ice covered lakes of the McMurdo Dry Valleys (MDVs) of Antarctica, to evaluate their role in the ecology and geochemical evolution of the lakes. ClO3 and ClO4 are present throughout the MDV Lakes, streams, and other surface water bodies. ClO3 and ClO4 originate in the atmosphere and are transported to the lakes by surface in...
متن کاملHydrologic response to extreme warm and cold summers in the McMurdo Dry Valleys, East Antarctica
The meteorological characteristics and hydrological response of an extreme warm, and cold summer in the McMurdo Dry Valleys are compared. The driver behind the warmer summer conditions was the occurrence of down-valley winds, which were not present during the colder summer. Occurrence of the summer down-valley winds coincided with lower than typical mean sea level pressure in the Ross Sea regio...
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ژورنال
عنوان ژورنال: Journal of Petrology
سال: 2007
ISSN: 1460-2415,0022-3530
DOI: 10.1093/petrology/egm022