High resolution provenancing of long travelled dust deposited on the Southern Alps, New Zealand

H A McGowan; B S Kamber; G H McTainsh; Samuel K Marx

doi:10.1016/j.geomorph.2005.01.005

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High resolution provenancing of long travelled dust deposited on the Southern Alps, New Zealand

Journal article

Peer reviewed

High resolution provenancing of long travelled dust deposited on the Southern Alps, New Zealand

H A McGowan, B S Kamber, G H McTainsh and Samuel K Marx

Geomorphology, Vol.69(1-4), pp.208-221

2005

DOI: https://doi.org/10.1016/j.geomorph.2005.01.005

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Abstract

Geology

Physical Geography and Environmental Geoscience

dust deposition

geochemical provenance

air parcel trajectories

New Zealand

Australia

On 7 February 2000 an atypical orange discolouration of snowfields in the central Southern Alps, New Zealand occurred following the passage of a cold front. Analysis of snow samples identified fine orangey-brown dust mixed with much coarser grey dust. Air parcel forward trajectories from dust sources in southern and central Australia, where dust storms were reported on 4 February 2000, were computed to identify the deposits source. Geochemical analyses of the dust deposit using 26 trace elements, unaffected by regional air pollution and gravitational sorting, indicate that 20% of the dust was sourced from western New South Wales, with 45% from the eastern Eyre Peninsula of South Australia and the remaining 35% was local New Zealand dust. This provenancing approach provides a spatial resolution of long travelled dust sourcing not previously achieved.

Details

Title: High resolution provenancing of long travelled dust deposited on the Southern Alps, New Zealand
Authors: H A McGowan (Author) - University of Queensland
B S Kamber (Author) - University of Queensland
G H McTainsh (Author) - Griffith University
Samuel K Marx (Author) - University of Queensland
Publication details: Geomorphology, Vol.69(1-4), pp.208-221
Publisher: Elsevier BV
Date published: 2005
DOI: 10.1016/j.geomorph.2005.01.005
ISSN: 0169-555X
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449728102621
Output Type: Journal article

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