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Seasonal variations in the sources of natural and anthropogenic lead deposited at the East Rongbuk Glacier in the high-altitude Himalayas
Citation
Burn-Nunes, L and Vallelonga, P and Lee, K and Hong, S and Burton, G and Hou, S and Moy, AD and Edwards, R and Loss, R and Rosman, K, Seasonal variations in the sources of natural and anthropogenic lead deposited at the East Rongbuk Glacier in the high-altitude Himalayas, Science of the Total Environment, 487, (1) pp. 407-419. ISSN 0048-9697 (2014) [Refereed Article]
Copyright Statement
Copyright 2014 Elsevier
DOI: doi:10.1016/j.scitotenv.2014.03.120
Abstract
Lead (Pb) isotopic compositions and concentrations, and barium (Ba) and indium (In) concentrations have been analysed at sub-annual resolution in three sections from a <. 110. m ice core dated to the 18th and 20th centuries, as well as snow pit samples dated to 2004/2005, recovered from the East Rongbuk Glacier in the high-altitude Himalayas. Ice core sections indicate that atmospheric chemistry prior to ~. 1953. was controlled by mineral dust inputs, with no discernible volcanic or anthropogenic contributions. Eighteenth century monsoon ice core chemistry is indicative of dominant contributions from local Himalayan sources; non-monsoon ice core chemistry is linked to contributions from local (Himalayan), regional (Indian/Thar Desert) and long-range (North Africa, Central Asia) sources. Twentieth century monsoon and non-monsoon ice core data demonstrate similar seasonal sources of mineral dust, however with a transition to less-radiogenic isotopic signatures that suggests local and regional climate/environmental change. The snow pit record demonstrates natural and anthropogenic contributions during both seasons, with increased anthropogenic influence during non-monsoon times. Monsoon anthropogenic inputs are most likely sourced to South/South-East Asia and/or India, whereas non-monsoon anthropogenic inputs are most likely sourced to India and Central Asia. © 2014 Elsevier B.V.
Item Details
Item Type: | Refereed Article |
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Keywords: | East Rongbuk Glacier, Himalayas, lead, lead deposition |
Research Division: | Earth Sciences |
Research Group: | Physical geography and environmental geoscience |
Research Field: | Glaciology |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Climate variability (excl. social impacts) |
UTAS Author: | Moy, AD (Dr Andrew Moy) |
ID Code: | 92300 |
Year Published: | 2014 |
Web of Science® Times Cited: | 9 |
Deposited By: | CRC-Antarctic Climate & Ecosystems |
Deposited On: | 2014-06-13 |
Last Modified: | 2017-10-30 |
Downloads: | 0 |
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