Aeolian Dust Transport in West Africa

1989 ◽  
pp. 185-203 ◽  
Author(s):  
G. Tetzlaff ◽  
M. Peters ◽  
W. Janssen ◽  
L. J. Adams
Keyword(s):  
West Africa ◽  
Dust Transport ◽  
Aeolian Dust

Aeolian dust transport, cycle and influences in high-elevation cryosphere of the Tibetan Plateau region: New evidences from alpine snow and ice

2020 ◽  
Vol 211 ◽  
pp. 103408
Author(s):  
Zhiwen Dong ◽  
Janice Brahney ◽  
Shichang Kang ◽  
James Elser ◽  
Ting Wei ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
High Elevation ◽  
The Tibetan Plateau ◽  
Plateau Region ◽  
Dust Transport ◽  
Aeolian Dust ◽  
Transport Cycle ◽  
Snow And Ice

A Dust Monitoring Programme for Desertification Control in West Africa

1986 ◽  
Vol 13 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Grant H. McTainsh
Keyword(s):  
West Africa ◽  
Process Zone ◽  
Large Body ◽  
Monitoring Programme ◽  
Dust Deposition ◽  
Dust Collection ◽  
Dust Transport ◽  
Desertification Control ◽  
Process System ◽  
Winter Dust

To date, the principal constraint upon the implementation of a dust monitoring programme for desertification control in West Africa, is our limited knowledge of the dust processes to be monitored. A review of the state of dust research in Africa and over the Atlantic reveals a strong imbalance in favour of the latter, and resolves some misconceptions concerning dust source-areas and the relative importance of winter and summer dust. The results of Atlantic Ocean dust research are here brought together with the recent results of Harmattan dust research in Nigeria to demonstrate, at least tentatively, that the Harmattan and winter dust comprise a contiguous aeolian process system referred to as the Harmattan aeolian system.The Harmattan aeolian system is used here as a conceptual framework for the dust monitoring programme. Three dust process-zones are identified, within which three basic aeolian processes operate: dust entrainment (primary and secondary), dust transport, and dust deposition (primary and secondary). Within each dust process-zone, standardized dust collection, measurement, and analysis techniques, are proposed for a network of monitoring sites. Entrainment and transport can be measured — directly using aerosol pump-samplers and indirectly by relating dust-aerosol concentration to solar radiation and visibility. The indirect approach has the advantage that it opens up a large body of historical data on dust and, therefore, desertification. Deposition can be measured using dust-traps. The importance of such aspects as site characteristics, measurement period, and laboratory methods, are also discussed. Finally, a minimal administrative structure is suggested, allowing for the possibility of UNEP or other major support.

Aeolian dust transport and deposition by foehn winds in an alpine environment, Lake Tekapo, New Zealand

Geomorphology ◽  
1996 ◽  
Vol 15 (2) ◽  
pp. 135-146 ◽  
Author(s):  
Hamish A. McGowan ◽  
Andrew P. Sturman ◽  
Ian F. Owens
Keyword(s):  
New Zealand ◽  
Alpine Environment ◽  
Dust Transport ◽  
Aeolian Dust

Impacts of aeolian dust deposition on phytoplankton dynamics in Queensland coastal waters

2008 ◽  
Vol 59 (11) ◽  
pp. 951 ◽  
Author(s):  
Emily C. Shaw ◽  
Albert J. Gabric ◽  
Grant H. McTainsh
Keyword(s):  
Coastal Waters ◽  
Standing Stock ◽  
Nutrient Budget ◽  
Dust Storms ◽  
Dust Deposition ◽  
Transport Modelling ◽  
Dust Transport ◽  
Aeolian Dust ◽  
Modelling Analysis

Aeolian dust deposition has been shown to stimulate phytoplankton growth in various oligotrophic oceanic regions of the northern hemisphere. The present study investigated the relationship between the change in phytoplankton biomass in Queensland coastal waters and aeolian dust deposition during the severe October 2002 dust storm, using satellite-derived chlorophyll concentrations. A response in phytoplankton standing stock immediately following dust deposition from this event was found in the area of maximal dust deposition, as defined by a previous dust transport modelling analysis. Standing stock levels increased to 1.5–2 times the long-term mean. This is the first documented episode of a dust fertilisation event in Australian coastal waters and, given the high frequency of dust storms in northern Australia, demonstrates that aeolian delivery of nutrients may be an important factor in future regional nutrient budget analyses.

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