Lead, sulphate, and aluminium concentrations and lead crustal enrichment factors in Mt. Logan ice core during pre-anthropogenic to modern periods
| Cobertura |
LATITUDE: 60.590000 * LONGITUDE: -140.500000 |
|---|---|
| Data(s) |
20/08/2011
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| Resumo |
A high-resolution, 8000 year-long ice core record from the Mt. Logan summit plateau (5300 m asl) reveals the initiation of trans-Pacific lead (Pb) pollution by ca. 1730, and a >10-fold increase in Pb concentration (1981-1998 mean = 68.9 ng/l) above natural background (5.6 ng/l) attributed to rising anthropogenic Pb emissions from Asia. The largest rise in North Pacific Pb pollution from 1970-1998 (end of record) is contemporaneous with a decrease in Eurasian and North American Pb pollution as documented in ice core records from Greenland, Devon Island, and the European Alps. The distinct Pb pollution history in the North Pacific is interpreted to result from the later industrialization and less stringent abatement measures in Asia compared to North America and Eurasia. The Mt. Logan record shows evidence for both a rising Pb emissions signal from Asia and a trans-Pacific transport efficiency signal related to the strength of the Aleutian Low. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.818220 doi:10.1594/PANGAEA.818220 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Osterberg, Erich; Mayewski, P; Kreutz, K; Fisher, D; Handley, M; Sneed, S; Zdanowicz, Christian; Zheng, J; Demuth, M; Waskiewicz, M; Bourgeois, J (2008): Ice core record of rising lead pollution in the North Pacific atmosphere. Geophysical Research Letters, 35(5), L05810, doi:10.1029/2007GL032680 |
| Palavras-Chave | #[SO4]2-; Age; AGE; Al; Aluminium; EF; Enrichment factor; Ice_core_diverse; ICEDRILL; Ice drill; International Polar Year (2007-2008); IPY; Lead; Lead flux; Mt_Logan_PRCol; Pb; Pb EF, using only Al as a crustal reference element; Pb EF, using only Ce as a crustal reference element; Pb EF, using only Cs as a crustal reference element; Pb EF, using only Fe as a crustal reference element; Pb EF, using only La as a crustal reference element; Pb EF, using only Sr as a crustal reference element; Pb EF, using only U as a crustal reference element; Pb EF, using Sr, Cs, U, Al, Fe, La and Ce as crustal reference elements; Pb flux; period from; period to; Sampling/drilling ice; Sulfate; Yukon, Canada, North America |
| Tipo |
Dataset |
