Vostok station

Salamatin, A. N., Lipenkov, V. Y., Barkov, N. I. et al. (1998). Ice core age dating and paleothermometer calibration based on isotope and temperature profiles from deep boreholes at Vostok Station (East Antarctica). /. Geophys. Res. 103(D8), 8963-8977. 

Uchida, T. Hondoh, T. Mae, S. Lipenkov, V.Y. Duval, P. (1994). Air-hydrate crystals in deep ice-core samples from Vostok Station Antartica. J. Glaciology, 40 (134), 79-88. 

Bender, M. L., T. Sowers, J.-M. Barnola, and J. Chappellaz, Changes in the 02/N2 Ratio of the Atmosphere during Recent Decades Reflected in the Composition of Air in the Firn at Vostok Station, Antarctica, Geophys. Res. Lett., 21, 189-192 (1994). 

Deep Boreholes at Vostok Station (East Antarctica), J. Geophys. Res., 103, 8963-8977 (1998). 

Figure 10.36. The CO2 content of air bubbles trapped in Antarctic glacial ice at the Vostok station as a function of depth in the ice core. Two ages of the ice are shown. (After Barnola et al., 1987.)...

Ekaykin A. A., Lipenkov V. Y., Barkov N. L, Petit J. R., and Masson-Dehnotte V. (2002) Spatial and temporal variability in isotope composition of recent snow in the vicinity of Vostok Station implications for ice-core record interpretation. Ann. Glacial. 35, 181-186. 

FIGURE 23.3 Air temperature near Antarctica for the last 150,000 years. Temperatures given are inferred from hydrogen/deuterium ratios measured in an ice core from the Antarctic Vostok station, with reference to the value for 1900 [Crowley (1996) based on Bradley and Eddy (1991) and Jouzel et al. (1987)]. 

In the cryosphere, precipitated snow undergoes transformation into ice layers. Drilling of so-called ice-cores gives us insights into the chemical composition of the palaeoatmosphere. Ice cores have been taken from many locations around the world, especially in Greenland and Antarctica. In January 1998, the collaborative ice-drilling project between Russia, the United States and France at the Russian Vostok station in East Antarctica yielded the deepest ice core ever recovered, reaching a depth of 3623 m. Preliminary data indicates the Vostok ice-core record ex-... 

The ice sheet was penetrated by drilling at Vostok Station (Russia) on the East Antarctic ice sheet and at Byrd Station (USA) in West Antarctica. The resulting cores contain valuable records of past climatic conditions, but only the core at Byrd Station recovered samples of the subglacial bedrock. The climate record contained in these cores and in the core that was recently recovered at Dome C will be featured in a later section of this chapter. 

Fig. 17.44 The chemical compositions of coarse tephra at different depths in the Byrd-Station core classify them as alkali-rich tra-chytes/phonolites. The points labeled 1 and 2 are volcanic rocks from Mt. Takahe and Mt. Sidley, respectively, in Marie Byrd Land. The chemical compositions of the fine tephra in the Byrd-Station core scatter widely and are not shown on this diagram. The tephra from South Pole, the Yamato Mountains, and Vostok Station are andesites that could have originated from volcanoes in the South Sandwich Islands (3 = Candlemas Island, 4 = Bellingshausen Island). Tephra from the Lewis Cliff ice tongue are composed of...

The Vostok tephra are very similar in composition to the tephra in the South-Pole core and closely resemble the andesite in Candlemas and Bellingshausen islands of the South Sandwich Islands in Fig. 17.46 (57°45 S, 026°30 W) (Tomblin 1979 Baker 1978). The distance between these islands and Vostok station is about 4,500 km (Palais et al. 1987 Kyle et al. 1984). In spite of the dispersion during transport through the atmosphere, the thickness of the tephra layer in the Vostok core is 5 cm at a depth of 101 m giving it an assigned age of 3,300 years. Therefore, the volcanic ash erupted by volcanoes in the South Sandwich Islands may have formed a large plume over East Antarctica. If so, this ash layer may be a useful stratigraphic marker in the East Antarctic ice sheet (Kyle et al. 1984). 

Vostok Station, Antarctica, on July 21,1983). Express this temperature in degrees Celsius and kelvin. 

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