Harmattan dust deposited in Ghana within 2000-2005

Q4 Environmental Science West African Journal of Applied Ecology Pub Date : 2009-09-07 DOI:10.4314/WAJAE.V11I1.45723
T. Awadzi, H. Breuning‐madsen
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引用次数: 10

Abstract

Between 2000–2005, a monitoring system for the collection of harmattan dust over Ghana was established. Three methods were used to sample the harmattan dust: i) bowls with water, ii) plastic mats and iii) plates made of plywood. This paper describes the establishment of the monitoring system, and the regional distribution of harmattan dust trapped in various agro-ecological zones by the bowls with water and the mats. The bowl values represent the total amount of dust falling over a unit area, and the mat values represents the amount of dust retained by vegetation. The amount of harmattan dust captured is largest in the north where the mats retained about 20 g/cm3 compared to 5 g/cm3 in the south. The amount of dust retained differs significantly from year to year, and the particle-size of the dust becomes finer towards the south and with an increasing amount of organic matter. In the north, the median diameter was slightly above 15 mm and the organic carbon content was about 5% while in the south the median diameter was slightly above 5 mm and the organic carbon content was between 10 and 15%.
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2000-2005年期间,Harmattan尘埃在加纳沉积
2000年至2005年期间,加纳建立了一个收集哈玛坦粉尘的监测系统。采用三种方法对哈玛坦粉尘进行取样:i)用水碗,ii)塑料垫和iii)胶合板制成的板。本文介绍了监测系统的建立,以及在不同农业生态区用水碗和草垫捕获的哈玛丹粉尘的区域分布情况。碗状值表示单位面积上落尘总量,席状值表示植被保留的粉尘量。捕获的哈玛坦尘埃量在北部最大,那里的垫子保留了大约20克/立方厘米,而南部的垫子保留了5克/立方厘米。不同年份的沙尘滞留量差异显著,沙尘粒径越向南越细,有机质含量越高。北部土壤直径中位数略高于15 mm,有机碳含量约为5%;南部土壤直径中位数略高于5 mm,有机碳含量在10% ~ 15%之间。
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来源期刊
West African Journal of Applied Ecology
West African Journal of Applied Ecology Environmental Science-Ecology
CiteScore
0.80
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0.00%
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0
期刊介绍: This research journal has been established by the Ecological Laboratory Unit of the University of Ghana, Accra to publish original papers, invited articles and book reviews in English on general ecology. Papers are peer reviewed by consulting editors. The journal is targeted at scientists, policy makers and the general public. The subject areas to be covered include the following: -Theoretical and Applied Ecology- Environmental Studies- Environmental Management- Population Studies- Sustainable use of Natural Resources- Atmospheric Science- Aquatic Sciences and Oceanography- Terrestrial Ecology- Soil Sciences- Human Settlements- Disaster Preparedness and Disaster Reduction- Sustainable Development- Traditional Knowledge on Biodiversity and its sustainable use- Application in Agriculture and Land Use- Health and Environmental Protection
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