Pb and Sr isotopes from an ice-core provides evidence for changing atmospheric conditions at the Sajama icecap, South America SCIE SCOPUS

Cited 6 time in WEB OF SCIENCE Cited 6 time in Scopus
Title
Pb and Sr isotopes from an ice-core provides evidence for changing atmospheric conditions at the Sajama icecap, South America
Author(s)
Rosman, KJR; Hong, S; Burton, G; Burn, L; Boutron, CF; Ferrari, CP; Thompson, LG; Maurice-Bourgoin, L; Francou, B
Publication Year
2003-05
Abstract
Measurements of Pb and Sr isotopes and Pb, Sr, Ba and Rb concentrations in ice-core samples from the Sajama icecap in Bolivia were made to investigate the changing environmental conditions in the region over the past 22 ky.. The Pb isotopic measurements indicate there has been a significant change in the Pb-206/(207) Pb ratio in the ice by 1700 AD which can be attributed to human activity. This change was also accompanied by increasing Pb/Ba ratios that reach similar to10 times natural values by the beginning of the 20(th) century, confirming an increase of anthropogenic Pb levels. Sr and Rb concentrations are highly enhanced in 3 ky and 0.5 ky BP ice relative to the upper-crustal rock indicating a different origin for a significant proportion of the dust in these samples. Likely sources of this dust are dry lake beds that occur on the Altiplano as a result of changing climatic conditions. This dust adds to the background level of dust accumulating on the Sajama icecap.
ISSN
1155-4339
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5512
DOI
10.1051/jp4:20030505
Bibliographic Citation
JOURNAL DE PHYSIQUE IV, v.107, pp.1157 - 1160, 2003
Publisher
E D P SCIENCES
Subject
POLAR ICE; CLIMATE; SNOW; LEAD
Type
Article
Language
English
Document Type
Article; Proceedings Paper
Publisher
E D P SCIENCES
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