干旱区生态环境知识资源中心(Arid): Aeolian dust transportation and deposition by near-surface winds in arid and semiarid China

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	Aeolian dust transportation and deposition by near-surface winds in arid and semiarid China
	Li, JinChang; Dong, ZhiBao; Qian, GuangQiang; Luo, WanYin
通讯作者	Li, JC
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2010
卷号	2 期号:2 页码:137-142
英文摘要	Dustfall collections were carried out in April and May 2001 and in March 2002 at six sites in northern China. Our results showed that the total deposition of dust fractions < 250 mu m in diameter and the deposition of Fe both decreased exponentially with increasing distances from the source areas, and that the half-attenuation distance (HAD) for dust deposition was about 229 km in this region. The HAD was closely related to the grain-size distribution of the dust, and the 15 to 20 mu m fractions had the longest HAD. However, the fractions < 15 mu m in diameter can be easily adsorbed to coarse particles and deposited after only short distances, and the HAD for the fractions 15 to 100 mu m in diameter showed a power relationship with the grain-size distribution. The HAD for Fe deposition was 233 km, which was a little longer than that of total dust deposition, which suggests that the Fe content is higher in fine particles than in coarse particles, as previous studies have suggested. In addition, our analysis showed that under the control of current climatic conditions, the coarse fractions in dust derived from northwestern China cannot be transported over long distances, instead, it is transported primarily by near-surface winds (< 3 km above the ground). The Fe in aeolian dust generated from arid and semiarid regions of China and deposited in the North Pacific region is usually transported by the upper westerlies.
英文关键词	dust deposition half-attenuation distance near-surface wind arid and semiarid regions of China
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000422275300006
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/329561
作者单位	[Li, JinChang] Shanxi Univ, Inst Loess Plateau, Taiyuan 030006, Shanxi, Peoples R China; [Dong, ZhiBao; Qian, GuangQiang; Luo, WanYin] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, JinChang,Dong, ZhiBao,Qian, GuangQiang,et al. Aeolian dust transportation and deposition by near-surface winds in arid and semiarid China[J]. 中国科学院西北生态环境资源研究院,2010,2(2):137-142.
APA	Li, JinChang,Dong, ZhiBao,Qian, GuangQiang,&Luo, WanYin.(2010).Aeolian dust transportation and deposition by near-surface winds in arid and semiarid China.SCIENCES IN COLD AND ARID REGIONS,2(2),137-142.
MLA	Li, JinChang,et al."Aeolian dust transportation and deposition by near-surface winds in arid and semiarid China".SCIENCES IN COLD AND ARID REGIONS 2.2(2010):137-142.