Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
نویسندگان
چکیده
منابع مشابه
Limnological conditions in Subglacial Lake Vostok, Antarctica
Subglacial Lake Vostok is located ,4 km beneath the surface of the East Antarctic Ice Sheet and has been isolated from the atmosphere for .15 million yr. Concerns for environmental protection have prevented direct sampling of the lake water thus far. However, an ice core has been retrieved from above the lake in which the bottom ,85 m represents lake water that has accreted (i.e., frozen) to th...
متن کاملGeomicrobiology of subglacial ice above Lake Vostok, Antarctica.
Data from ice 3590 meters below Vostok Station indicate that the ice was accreted from liquid water associated with Lake Vostok. Microbes were observed at concentrations ranging from 2.8 x 10(3) to 3.6 x 10(4) cells per milliliter; no biological incorporation of selected organic substrates or bicarbonate was detected. Bacterial 16S ribosomal DNA genes revealed low diversity in the gene populati...
متن کاملEcology of Subglacial Lake Vostok (Antarctica), Based on Metagenomic/Metatranscriptomic Analyses of Accretion Ice
Lake Vostok is the largest of the nearly 400 subglacial Antarctic lakes and has been continuously buried by glacial ice for 15 million years. Extreme cold, heat (from possible hydrothermal activity), pressure (from the overriding glacier) and dissolved oxygen (delivered by melting meteoric ice), in addition to limited nutrients and complete darkness, combine to produce one of the most extreme e...
متن کاملIncorporation of particulates into accreted ice above subglacial Lake Vostok , Antarctica
The nature of microscopic particulates in meteoric and accreted ice from the Vostok ice core, is assessed in conjunction with existing ice core data to investigate the mechanism by which particulates are incorporated into refrozen lake water. Melted ice samples from a range of ice core depths were filtered through 0.2 μm polycarbonate membranes and secondary electron images were collected at ×5...
متن کاملMicroorganisms in the accreted ice of Lake Vostok, Antarctica.
Analysis of a portion of Vostok ice core number 5G, which is thought to contain frozen water derived from Lake Vostok, Antarctica (a body of liquid water located beneath about 4 kilometers of glacial ice), revealed between 2 x 10(2) and 3 x 10(2) bacterial cells per milliliter and low concentrations of potential growth nutrients. Lipopolysaccharide (a Gram-negative bacterial cell biomarker) was...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Earth Surface
سال: 2014
ISSN: 2169-9003
DOI: 10.1002/2014jf003228