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6 results on '"Bolzan, J.F."'

1. Tropical climate instability: the last glacial cycle from a Qinghai-Tibetan ice core

Author

Thompson, L.G., Yao, T., Davis, M.E., Henderson, K.A., Mosley-Thompson, E., Lin, P.-N., Beer, J., Synal, H.-A., Cole-Dai, J., and Bolzan, J.F.

Subjects
China -- Natural history, Paleoclimatology -- China -- Research, Glacial climates -- Research, Science and technology
Abstract

An ice core record from the Gull ice cap on the Qinghai-Tibetan Plateau provides evidence of regional climatic conditions over the last glacial cycle. [sup.36]Cl data suggest that the deepest [...]

Published
1997

2. Holocene-late pleistocene climatic ice core records from Qinghai-Tibetan Plateau

Author

Thompson, L.G., Mosley-Thompson, E., Davis, M.E., Bolzan, J.F., Dai, J., Yao, T., Gundestrup, N., Wu, X., Klein, L., and Xie, Z.

Subjects
Tsaidam Basin -- Natural history, Paleoclimatology -- Research, Ice caps -- Research, Science and technology, Research, Natural history
Abstract

Holocene--Late Pleistocene Climatic Ice Core Records from Qinghai-Tibetan Plateau THE DUNDE ICE CAP (38°06'N, 96°24'E) is located in a desert environment between the highest Chinese desert, the Qaidam Basin, to [...]

Published
1989

3. A 25,000-year tropical climate history from Bolivian ice cores

Author

Thompson, L.G., Davis, M.E., Mosley-Thompson, E., Sowers, T.A., Henderson, K.A., Zagorodnov, V.S., Lin, P.N., Mikhalenko, V.N., Campen, R.K., Bolzan, J.F., Cole-Dai, J., and Francou, Bernard

Subjects
PALEOCLIMAT, CHANGEMENT CLIMATIQUE, GLACIER, HOLOCENE, ANALYSE ISOTOPIQUE, OXYGENE
Abstract

Ice cores that were recovered from the summit of Sajama mountain in Bolivia provide carbon-14-dated tropical records and extend to the Late Glacial State (LGS). Oxygen isotopic ratios of the ice decreased 5.4 per mil between the early Holocene and the Last Glacial Maximum, which is consistent with values from other ice cores. The abrupt onset and termination of a Younger Dryas-type event suggest atmospheric processes' as the probable drivers. Regional accumulation increased during the LGS, during deglaciation, and over the past 3000 years, which is concurrent with higher water levels in regional paleolakes. Unlike polar cores, Sajama glacial ice contains eight times less dust than the Holocene ice, which reflects wetter conditions and extensive snow cover. (Résumé d'auteur)

Published
1998

5. A 1500-year record of precipitation in ice cores from the Quelccaya Ice Cap, Peru

Author

Thompson, L.G., Mosley-Thompson, E., Koci, B.R., and Bolzan, J.F.

Subjects
Glaciers -- Peru -- Research, Atmospheric circulation -- Research, Ice -- Research, Climatology -- Research, Science and technology, Research
Abstract

Since 1976 a glaciological research program (1) has been conducted each summer on the tropical Quelccaya ice cap in the Andes of southern Peru. In 1983 two cores were recovered, [...]

Published
1985

6. Glacial stage ice-core from the subtropical Dunde Ice Cap, China

Author

Thompson, L.G., Mosley-Thompson, E., Davis, M.E., Bolzan, J.F., Dai, J., Klein, L., Gundestrup, N., Yao, T., Wu, X., Xie, Z., Thompson, L.G., Mosley-Thompson, E., Davis, M.E., Bolzan, J.F., Dai, J., Klein, L., Gundestrup, N., Yao, T., Wu, X., and Xie, Z.

Published
1990

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