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Title: Seasonal and decadal variability of dust observations in the Kangerlussuaq area, West Greenland
Authors: Bullard, Joanna E.
Mockford, Tom
Issue Date: 2017
Publisher: University of Colorado at Boulder, Institute of Arctic and Alpine Research
Citation: BULLARD, J.E. and MOCKFORD, T., 2017. Seasonal and decadal variability of dust observations in the Kangerlussuaq area, West Greenland. Arctic, Antarctic, and Alpine Research, In Press.
Abstract: Dust emissions from high-latitude, cold climate environments have started receiving more attention in the past decade. This is because emission frequency and magnitudes are expected to increase with rising global temperatures leading to a reduction in terrestrial ice masses and increases in suitable sediment for the aeolian system. Of the identified high-latitude dust source regions, Greenland has received relatively little attention. Using World Meteorological Organization (WMO) dust code analysis, this study presents a 70-year record of dust events and preferential dust transport pathways from Kangerlussuaq, west Greenland. A clear seasonal pattern of dust emissions shows increases in dust events in spring and autumn driven by effective winds and sediment supply. The decadal record suggests an increase in the magnitude, but not frequency, of dust events since the early 1990s. Pathways analysis suggests that dust is preferentially transported away from the Greenland Ice Sheet (GrIS) towards the Davis Strait and Labrador Sea. When dust is transported towards the GrIS, it is more likely to be deposited in the ice-marginal ablation zone than on the higher altitude areas of the ice sheet. The impact of dust deposition on terrestrial, cryospheric and aquatic environments is also discussed.
Description: This work is in closed access.
Sponsor: This work was partially-funded by The Leverhulme Trust (IN-2013-036) and the UK Natural Environment Research Council (NE/P011578/1).
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/25548
Publisher Link: http://instaar.colorado.edu/AAAR/index.php
ISSN: 1938-4246
Appears in Collections:Closed Access (Geography)

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