Air-hydrate crystals in deep ice-core samples from Vostok Station, Antarctica
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...
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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...
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The depth dependence of bubble concentration at pressures above the transition to the air hydrate phase and the optical scattering length due to bubbles in deep ice at the South Pole are modeled with diffusion-growth data from the laboratory, taking into account the dependence of age and temperature on depth in the ice. The model fits the available data on bubbles in cores from Vostok and Byrd ...
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Kyle, P. R., Jezek, P. A., M o s l e y T h o m p s o n , E. and T h o m p s o n , L. G., 1981. T e p h r a layers in the Byrd S ta t ion ice core and the Dome C ice core, A n t a r c t i c a and the i r c l imat ic impor t ance . J_ Volcanol . G e o t h e r m . Res., 11: 29---39. Volcanic glass shards f r o m t e p h r a layers in the Byrd S ta t ion ice core were chemmal ly analyzed by e l ec ...
متن کاملUltra-low rare earth element content in accreted ice from sub-glacial Lake Vostok, Antarctica
This paper reports the first rare earth element (REE) concentrations in accreted ice refrozen from sub-glacial Lake Vostok (East Antarctica). REE were determined in various sections of the Vostok ice core in order to geochemically characterize its impurities. Samples were obtained from accreted ice and, for comparison, from the upper glacier ice of atmospheric origin (undisturbed, disturbed and...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1994
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000003828