DOI: 10.1002/2017JC013535
Scopus记录号: 2-s2.0-85042089245
论文题名: Variability and Dynamics of the Yucatan Upwelling: High-Resolution Simulations
作者: Jouanno J. ; Pallàs-Sanz E. ; Sheinbaum J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1251
结束页码: 1262
语种: 英语
英文关键词: Gulf of Mexico
; Loop Current
; NEMO
; shelf
; upwelling
; Yucatan
Scopus关键词: coastal current
; continental shelf
; peak acceleration
; shelf break
; topographic effect
; upwelling
; vertical mixing
; wind forcing
; Atlantic Ocean
; Gulf of Mexico
; Loop Current
; Mexico [North America]
; Yucatan
英文摘要: The Yucatan shelf in the southern Gulf of Mexico is under the influence of an upwelling that uplifts cool and nutrient rich waters over the continental shelf. The analysis of a set of high-resolution (Δx = Δy ≈ 2.8 km) simulations of the Gulf of Mexico shows two dominant modes of variability of the Yucatan upwelling system: (1) a low-frequency mode related to variations in position and intensity of the Loop Current along the shelf, with upwelling intensified when the Loop Current is strong and approaches to the Yucatan shelf break and (2) a high-frequency mode with peak frequency in the 6–10 days band related to wind-forced coastal waves that force vertical velocities along the eastern Yucatan shelf break. To first order, the strength and position of the Loop Current are found to control the intensity of the upwelling, but we show that high-frequency winds also contribute (∼17%) to a net input of cool waters (<22.5°C) on the Yucatan shelf. Finally, although more observational studies are needed to corroborate the topographic character of the Yucatan upwelling system, this study reveals the key role played by a notch along the Yucatan shelf break: a sensitivity simulation without the notch shows a 55% reduction of the upwelling. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114598
Appears in Collections: 气候减缓与适应
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作者单位: LEGOS, IRD, Univ. Paul Sabatier, Observatoire Midi-PyrénéesToulouse, France; Departamento de Oceanografía Física, CICESE, EnsenadaBaja California, Mexico
Recommended Citation:
Jouanno J.,Pallàs-Sanz E.,Sheinbaum J.. Variability and Dynamics of the Yucatan Upwelling: High-Resolution Simulations[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)