气候变化领域集成服务门户(CCPortal): Coastal Upwelling and Estuarine Gravitational Circulation: A Feedback System in a Tropical Estuary in the South Atlantic

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DOI	10.1007/s12237-023-01312-9
	Coastal Upwelling and Estuarine Gravitational Circulation: A Feedback System in a Tropical Estuary in the South Atlantic
	Fonseca, Lucas S.; Lessa, Guilherme C.; Marta-Almeida, Martinho; Teixeira, Carlos Eduardo P.
发表日期	2024
ISSN	1559-2723
EISSN	1559-2731
起始页码	47
结束页码	3
卷号	47 期号:3
英文摘要	This study examines the effects of coastal upwelling on the longitudinal water density gradient within the estuary of Baia de Todos os Santos (BTS), its effect on the gravitational circulation at the estuary entrance, and the reverse effect of gravitational circulation on the coastal upwelling. This investigation was based on a 1-year dataset of observed water temperature, mean velocities, and river discharge, as well as 2 years of numerical simulation of the estuarine flow. The results show that the upwelling regulates the thermohaline field in front of the BTS, decreasing water temperature (up to 3 degrees C), and increasing density (up to 0.3 kg/m3), and have sufficient intensity to more than double the speed, or even establish, the gravitational circulation. It was frequently observed that the water temperature falls after an increase in the subtidal flow shear, suggesting that the estuarine gravitational circulation acts as a facilitator to the upwelling process. Numerical simulations indicate that the coastal upwelling events are also capable of reestablishing the gravitational circulation at times with weak longitudinal density gradient, a scenario that tends to become more frequent and intense in the near future due to the ongoing climate changes.
英文关键词	Baia de Todos os Santos; Coastal circulation; Water density; Climate change
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:001150429700001
来源期刊	ESTUARIES AND COASTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295136
作者单位	Universidade Federal da Bahia; Spanish Institute of Oceanography; Universidade Federal do Ceara
推荐引用方式 GB/T 7714	Fonseca, Lucas S.,Lessa, Guilherme C.,Marta-Almeida, Martinho,et al. Coastal Upwelling and Estuarine Gravitational Circulation: A Feedback System in a Tropical Estuary in the South Atlantic[J],2024,47(3).
APA	Fonseca, Lucas S.,Lessa, Guilherme C.,Marta-Almeida, Martinho,&Teixeira, Carlos Eduardo P..(2024).Coastal Upwelling and Estuarine Gravitational Circulation: A Feedback System in a Tropical Estuary in the South Atlantic.ESTUARIES AND COASTS,47(3).
MLA	Fonseca, Lucas S.,et al."Coastal Upwelling and Estuarine Gravitational Circulation: A Feedback System in a Tropical Estuary in the South Atlantic".ESTUARIES AND COASTS 47.3(2024).