气候变化领域集成服务门户(CCPortal): Dust emission from desertified lands in the Heihe River Basin, Northwest China

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DOI	10.1007/s00254-006-0432-9
	Dust emission from desertified lands in the Heihe River Basin, Northwest China
	Wang, Tao; Ta, Wanquan; Liu, Lichao
发表日期	2007
ISSN	0943-0105
卷号	51 期号:8
英文摘要	The annual and seasonal dust emissions were calculated for eight types of desertified lands at 120 sites in the Heihe River Basin of northwestern China. The results showed that dust emission rates increased from the middle to the lower reaches of the river by a factor of up to 10(3). There two strongest areas of dust emission are the dried-up Gaxun Lake with a dust emission rate of 1.6 t ha(-1) year(-1), and the desertified grassland areas around the abandoned Heicheng City, with a dust emission rate of 0.6-0.7 t ha(-1) year(-1). The total annual dust emissions with their particle diameters less than 50, 30, and 10 mu m were 1.71 x 10(6), 1.11 x 10(6), and 0.555 x 10(6) t, respectively. Dust emission rates showed striking seasonal variations, with the maximum value (45%) occurring in spring and the minimum value (13.5%) in summer. The mineral aerosol-size distributions were also measured and the results showed that the size distributions for dust and non-dust events were both trimodal, in contrast with the widely accepted view that primary particles such as aeolian dust are coarse, whereas particles less than 1 mu m in diameter are mainly secondary particulate substances such as ammonium nitrate, ammonium sulfate, and organic matter.
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL GEOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111490
推荐引用方式 GB/T 7714	Wang, Tao,Ta, Wanquan,Liu, Lichao. Dust emission from desertified lands in the Heihe River Basin, Northwest China[J]. 中国科学院西北生态环境资源研究院,2007,51(8).
APA	Wang, Tao,Ta, Wanquan,&Liu, Lichao.(2007).Dust emission from desertified lands in the Heihe River Basin, Northwest China.ENVIRONMENTAL GEOLOGY,51(8).
MLA	Wang, Tao,et al."Dust emission from desertified lands in the Heihe River Basin, Northwest China".ENVIRONMENTAL GEOLOGY 51.8(2007).