Mineralogy of dust deposited during the Harmattan season in Ghana

He, Changling; Breuning‐Madsen, Henrik; Awadzi, Theodore W.

doi:10.1080/00167223.2007.10801371

Cited by 28 publications

(14 citation statements)

References 14 publications

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“…The clay fraction was flocculated with a divalent ion (Ca 2+ ) to stabilize the swelling clays (these were expected based on the study of He et al . []). The clay fraction was split into five subsamples.…”

Section: Methodssupporting

confidence: 82%

“…In northern Ghana, studies of He et al . [] and Lyngsie et al . [] indicate that a significant amount of dust deposited in the Harmattan period is of local origin.…”

Section: Introductionsupporting

confidence: 90%

“…[3] In northern Ghana, studies of He et al [2007] and Lyngsie et al [2011] indicate that a significant amount of dust deposited in the Harmattan period is of local origin. Nevertheless, both studies find traces of sediment which may have its origin in an arid environment.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the inter tropical discontinuity on Harmattan dust deposition in Ghana

Lyngsie

Olsen

Awadzi³

et al. 2013

Geochem Geophys Geosyst

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[1] The Harmattan is a dry dust-laden continental wind, and in the boreal winter Harmattan dust plumes affects many West African countries, including Ghana. When the Harmattan is strongest the southern part of Ghana is affected by the Inter Tropical Discontinuity (ITD). In this study, we investigate if the ITD functions as a barrier, preventing long transported Harmattan dust to settle south of, and below, it. This is done by analyzing a Harmattan dust outbreak, mapped using Earth observation (EO) data from the Spinning Enhanced Visible and Infrared Imager (SEVIRI) onboard the Meteosat Second Generation (MSG) platform, coupled with data from West African AERONET stations, and comparing these observations with wind data from NOAA's Air Resources Laboratory (ARL) program and the mineral suite of samples from seasonal dust deposits in north and south Ghana. In northern Ghana traces of minerals indicate a weak influence of particles from an arid environment, which is found consistent with the mapped dust plumes and NE wind directions. In southern Ghana the mineral composition show no sediments of an arid origin, the mapped dust plumes is less intense, and the surface wind directions and wind mass trajectories are more varying with lower wind speeds. Based on the results of this study it is concluded that dust deposited, or measured near ground, in the Harmattan period under the ITD, and south of it, does not contain material from the Chad Basin due to the local winds conditions.

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Section: Methodssupporting

confidence: 82%

“…In northern Ghana, studies of He et al . [] and Lyngsie et al . [] indicate that a significant amount of dust deposited in the Harmattan period is of local origin.…”

Section: Introductionsupporting

confidence: 90%

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Influence of the inter tropical discontinuity on Harmattan dust deposition in Ghana

Lyngsie

Olsen

Awadzi³

et al. 2013

Geochem Geophys Geosyst

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show abstract

“…The strong winds during the dry season (Harmattan) remove large quantities of sediments and nutrients from the area (Diouf, 2006), although substantial inputs of nutrients emanating from harmattan dust can also be expected to be deposited during the dry season (Tiessen et al, 1991;He et al, 2007). This dry season erosion process is worsened by water erosion, particularly at the onset of the rainy season when strong rains on bare slopes favor erosion.…”

Section: Soil Conditionsmentioning

confidence: 97%

The history of environmental change and adaptation in eastern Saloum–Senegal—Driving forces and perceptions

Mbow

Mertz

Diouf

et al. 2008

Global and Planetary Change

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“…The high SiO 2 content seen in the Bodélé sediments (56-79%) reflects a high proportion of quartz (∼20%) which is typical for Saharan (Chester et al, 1972;Middleton and Goudie, 2001) and Harmattan dusts (He et al, 2007), as well as the presence of diatomite fragments (up to 30%).…”

Section: Major Element Compositionsmentioning

confidence: 99%

Geochemical and isotopic characterization of the Bodélé Depression dust source and implications for transatlantic dust transport to the Amazon Basin

Abouchami

Näthe

Kumar

et al. 2013

Earth and Planetary Science Letters

117

122

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Mineralogy of dust deposited during the Harmattan season in Ghana

Cited by 28 publications

References 14 publications

Influence of the inter tropical discontinuity on Harmattan dust deposition in Ghana

Influence of the inter tropical discontinuity on Harmattan dust deposition in Ghana

The history of environmental change and adaptation in eastern Saloum–Senegal—Driving forces and perceptions

Geochemical and isotopic characterization of the Bodélé Depression dust source and implications for transatlantic dust transport to the Amazon Basin

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