Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S0277-3791(00)00184-0 |
Orbital forcing of dust supply to the North Canary Basin over the last 250 kyr | |
Moreno, A; Targarona, J; Henderiks, J; Canals, M; Freudenthal, T; Meggers, H | |
通讯作者 | Canals, M |
来源期刊 | QUATERNARY SCIENCE REVIEWS
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ISSN | 0277-3791 |
出版年 | 2001 |
卷号 | 20期号:12页码:1327-1339 |
英文摘要 | The Canary Basin lies in a region of strong interaction between the atmospheric and ocean circulation systems: Trade winds drive seasonal coastal upwelling and dust storm outbreaks from the neighbouring Sahara desert are the major source of terrigenous sediment. To investigate the forcing mechanisms for dust input and wind strength in the North Canary Basin, the temporal pattern of variability of sedimentological and geochemical proxy records has been analysed in two sediment cores between latitudes 30 degrees 30 ’N and 31 degrees 40 ’N. Spectral analysis of the dust proxy records indicates that insolation changes related to eccentricity and procession are the main periods of temporal variation in the record. Si/Al and grain-size of the terrigenous Fraction show an increase in glacial-interglacial transitions while Al concentration and Fe/Al ratio are both in phase with minima in the precessional index. Hence, the results obtained show that the wind strength was intensified at Terminations. At times of maxima of Northern Hemisphere seasonal insolation, when the African monsoon was enhanced, the North Canary Basin also received higher dust input. This result suggests that the moisture brought by the monsoon may have increased the availability of dust in the source region. (C) 2001 Elsevier Science Ltd. All rights reserved. |
类型 | Article |
语种 | 英语 |
国家 | Spain ; Switzerland ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000169541800004 |
WOS关键词 | TROPICAL ATLANTIC ; DEEP-SEA ; GLACIAL MAXIMUM ; EQUATORIAL ATLANTIC ; CLIMATIC CHANGES ; AFRICAN CLIMATE ; POLLEN RECORDS ; WIND REGIMES ; ARABIAN SEA ; FRESH-WATER |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/141693 |
作者单位 | (1)Univ Barcelona, Dept Estratigrafia & Paleontol, Grup Recerca Consolidat Geociencies Marines, Campus Pedralbes, E-08071 Barcelona, Spain;(2)Swiss Fed Inst Technol, Inst Geol, CH-8092 Zurich, Switzerland;(3)Univ Bremen, FB Geowissensch, D-28359 Bremen, Germany |
推荐引用方式 GB/T 7714 | Moreno, A,Targarona, J,Henderiks, J,et al. Orbital forcing of dust supply to the North Canary Basin over the last 250 kyr[J],2001,20(12):1327-1339. |
APA | Moreno, A,Targarona, J,Henderiks, J,Canals, M,Freudenthal, T,&Meggers, H.(2001).Orbital forcing of dust supply to the North Canary Basin over the last 250 kyr.QUATERNARY SCIENCE REVIEWS,20(12),1327-1339. |
MLA | Moreno, A,et al."Orbital forcing of dust supply to the North Canary Basin over the last 250 kyr".QUATERNARY SCIENCE REVIEWS 20.12(2001):1327-1339. |
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