Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.2002.1023 |
Dust deposition over the Dead Sea | |
Singer, A; Ganor, E; Dultz, S; Fischer, W | |
通讯作者 | Singer, A |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
![]() |
ISSN | 0140-1963 |
出版年 | 2003 |
卷号 | 53期号:1页码:41-59 |
英文摘要 | Dust deposition over the Dead Sea has been studied for 3 years (1997-1999) using two collectors installed on a buoy anchored 3.5 km off-shore, southeast of Ein-Gedi. Deposition rates ranged between lows during winter (6.7-15.2 g m(-2) year(-1)) and summer (11.4-24.7 g m(-2) year(-1)) and highs in spring (35.7-120.7 g m(-2) year(-1)) and autumn (39.1-158.3 g m(-2) year(-1)). Most of the deposition was in the form of pulses, generated by dust storms. A gradual increase in yearly deposition was observed from 255 kg ha(-1) in 1997, to 605 kg ha(-1) in 1999. The particle-size distribution is distinctly unimodal, with the mode close to 10 mum and is not season related. This distribution suggests that the dust had been transported from medium to long range and differs markedly from that of land based collectors, where the distribution curve is bimodal, indicating the presence of material of local origin. The deposit consists of soluble salts, carbonates, quartz, and aluminosilicates, principally feldspars and clay minerals. Soluble cations and anions, including bromide, are all related to Dead Sea water, except for nitrates which are of anthropogenic origin. Some of the sulphate may be air-borne gypsum. Calcite contents vary between 5.2% and 33.1%, dolomite in the range of 1.5-14.8%. The calcite/dolomite ratio rises with the rise in the deposition rate. Apatite is present in the range of 1-5% and apparently is season related. Small amounts of phosphate appear to be related to the frequency of winds blowing from a phosphate-mining area about 45 km away. Clay minerals include smectite, kaolinite, illite and minor amounts of palygorskite and differ distinctly from that of North-African Harmattan dust. The overall mineral composition of dust over the Dead Sea shows no relation to west and north Saharan dusts and suggests an origin principally in the Negev, Egyptian and Lybian deserts. (C) 2002 Elsevier Science Ltd. |
英文关键词 | dust deposition Dead Sea dust particle sizes dust mineralogy dust sources |
类型 | Article |
语种 | 英语 |
国家 | Israel ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000180205500004 |
WOS关键词 | WEST-AFRICA ; MEDITERRANEAN-SEA ; PARTICLE-SIZE ; TRANSPORT ; ISRAEL ; REGION ; DESERT ; NIGER ; MALI |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | Hebrew University of Jerusalem |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/144943 |
作者单位 | (1)Hebrew Univ Jerusalem, Seagram Ctr Soil & Water Sci, IL-76100 Rehovot, Israel;(2)Tel Aviv Univ, Dept Geophys, IL-69978 Tel Aviv, Israel;(3)Leibniz Univ Hannover, Inst Bodenkunde, D-30419 Hannover, Germany |
推荐引用方式 GB/T 7714 | Singer, A,Ganor, E,Dultz, S,et al. Dust deposition over the Dead Sea[J]. Hebrew University of Jerusalem,2003,53(1):41-59. |
APA | Singer, A,Ganor, E,Dultz, S,&Fischer, W.(2003).Dust deposition over the Dead Sea.JOURNAL OF ARID ENVIRONMENTS,53(1),41-59. |
MLA | Singer, A,et al."Dust deposition over the Dead Sea".JOURNAL OF ARID ENVIRONMENTS 53.1(2003):41-59. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。