Helium and Neon in the Accreted Ice of the Subglacial Antarctic Lake Vostok
نویسندگان
چکیده
منابع مشابه
Microorganisms 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...
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 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 کاملThe hydrochemistry of Lake Vostok and the potential for life in Antarctic subglacial lakes
Our understanding of Lake Vostok, the huge subglacial lake beneath the East Antarctic Ice Sheet, has improved recently through the identification of key physical and chemical interactions between the ice sheet and the lake. The north of the lake, where the overlying ice sheet is thickest, is characterized by subglacial melting, whereas freezing of lake water occurs in the south, resulting in 3⁄...
متن کاملLimnological 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...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2018
ISSN: 0094-8276
DOI: 10.1029/2018gl078068