气候变化领域集成服务门户(CCPortal): A Shift in the Wind Regime of the Southern End of the Canary Upwelling System at the Turn of the 20th Century

CCPortal

DOI	10.1029/2020JC017093
	A Shift in the Wind Regime of the Southern End of the Canary Upwelling System at the Turn of the 20th Century
	Gallego D.; García-Herrera R.; Losada T.; Mohino E.; Rodríguez de Fonseca B.
发表日期	2021
ISSN	21699275
卷号	126 期号:5
英文摘要	In this study, we make use of historical wind direction observations to assemble an instrumental upwelling index (DUI) at the southern end of the Canary Current Upwelling System. The DUI covers the period between 1825 and 2014 and, unlike other upwelling indices, it does not rely neither in wind speed nor in reanalyzed data. In this sense, the DUI can be regarded as an instrumental index. Additionally, it avoids the suspected bias toward increasing wind speed of historical wind observations documented in previous research. Our results indicate that the frequency of the alongshore winds at the west coast of Africa between 10°N and 20°N measured by the DUI is significantly related with the wind stress and therefore the upwelling intensity in this region. The DUI presents a significant variability both at interannual and decadal timescales. We have not found any significant trend for the 20th century. However, when the entire length of the series is considered, a large shift toward more frequent alongshore winds is evidenced as a result of several decade-long fluctuations which took place between the late 19th century and the beginning of the 20th century. This fact would imply that a significant change in the upwelling intensity at the southern end of the Canary Current Upwelling System should have occurred at the turn of the 20th century. © 2021. The Authors.
英文关键词	climate history; climate shift; Senegal; upwelling
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186331
作者单位	Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Seville, Spain; Departamento de Física de la Tierra y Astrofísica, Universidad Complutense, Madrid, Spain; IGEO, Instituto de Geociencias (CSIC, UCM), Madrid, Spain
推荐引用方式 GB/T 7714	Gallego D.,García-Herrera R.,Losada T.,et al. A Shift in the Wind Regime of the Southern End of the Canary Upwelling System at the Turn of the 20th Century[J],2021,126(5).
APA	Gallego D.,García-Herrera R.,Losada T.,Mohino E.,&Rodríguez de Fonseca B..(2021).A Shift in the Wind Regime of the Southern End of the Canary Upwelling System at the Turn of the 20th Century.Journal of Geophysical Research: Oceans,126(5).
MLA	Gallego D.,et al."A Shift in the Wind Regime of the Southern End of the Canary Upwelling System at the Turn of the 20th Century".Journal of Geophysical Research: Oceans 126.5(2021).