气候变化领域集成服务门户(CCPortal): The California Undercurrent as a Source of Upwelled Waters in a Coastal Filament

CCPortal

DOI	10.1029/2020JC016602
	The California Undercurrent as a Source of Upwelled Waters in a Coastal Filament
	Zaba K.D.; Franks P.J.S.; Ohman M.D.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	In the California Current System, cross-shore transport of upwelled, nutrient-rich waters from the coastal margin to the open ocean can occur within intermittent, submesoscale-to-mesoscale features such as filaments. Time-varying spatial gradients within filaments affect net cross-shore fluxes of physical, biological, and chemical tracers but require high-resolution measurements to accurately estimate. In June 2017, the California Current Ecosystem Long Term Ecological Research program process cruise (P1706) conducted repeat sections by an autonomous Spray glider and a towed SeaSoar to investigate the role of one such coastal upwelling feature, the Morro Bay filament, which was characterized by enhanced cross-filament gradients (both physical and biological) and an along-filament jet. Within the jet, speeds were up to 0.78 m/s and the offshore transport was 1.5 Sverdrups (3.8 Sverdrups) in the upper 100 m (500 m). A climatological data product from the sustained California Underwater Glider Network provided necessary information for water mass differentiation. The analysis revealed that the cold, salty side of the filament carried recently upwelled California Undercurrent water and corresponded to higher chlorophyll-a fluorescence than the warm, fresh side, which carried California Current water. Thus, there was a convergence of heterogeneous water masses within the core of the filament’s offshore-flowing jet. These water masses have different geographic origins and thermohaline characteristics, which has implications for filament-related cross-shore fluxes and submesoscale-to-mesoscale biological community structure gradients. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	filament; fluorescence; undercurrent; upwelling; water mass
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/186462
作者单位	Scripps Institution of Oceanography, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Zaba K.D.,Franks P.J.S.,Ohman M.D.. The California Undercurrent as a Source of Upwelled Waters in a Coastal Filament[J],2021,126(2).
APA	Zaba K.D.,Franks P.J.S.,&Ohman M.D..(2021).The California Undercurrent as a Source of Upwelled Waters in a Coastal Filament.Journal of Geophysical Research: Oceans,126(2).
MLA	Zaba K.D.,et al."The California Undercurrent as a Source of Upwelled Waters in a Coastal Filament".Journal of Geophysical Research: Oceans 126.2(2021).