Dust transportation and deposition in a superhumid environment, West Coast, South Island, New Zealand

SK Marx, HA McGowan - Catena, 2005 - Elsevier
Catena, 2005Elsevier
Contemporary rates of dust deposition monitored along a 300-km section of the superhumid
West Coast of New Zealand's South Island are presented. In this setting, dust is entrained
primarily from the dry channels of braided glaciofluvial rivers that drain the western slopes of
the Southern Alps. Measured dust deposition ranged between 0.21 and 118.9 kg− 1 ha− 1
month− 1, which is similar to dust deposition rates monitored in arid and semiarid
environments. However, these are not considered to be sufficient for present day loess …
Contemporary rates of dust deposition monitored along a 300-km section of the superhumid West Coast of New Zealand's South Island are presented. In this setting, dust is entrained primarily from the dry channels of braided glaciofluvial rivers that drain the western slopes of the Southern Alps. Measured dust deposition ranged between 0.21 and 118.9 kg−1 ha−1 month−1, which is similar to dust deposition rates monitored in arid and semiarid environments. However, these are not considered to be sufficient for present day loess genesis. Dust deposition was highest in summer because of the greater frequency of favourable dust transporting winds, and the effect of rainfall was secondary. Dust transportation occurred mainly during the passage of nonprecipitating cold fronts or postfrontal southwesterlies. Transportation also occurred during prefrontal conditions, and in winter föhn southeasterlies were the predominant dust transporting winds to affect the West Coast.
Elsevier
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