DOI: 10.1002/2014GL062569
论文题名: Net primary production in the Gulf Stream sustained by quasi-geostrophic vertical exchanges
作者: Pascual A. ; Ruiz S. ; Buongiorno Nardelli B. ; Guinehut S. ; Iudicone D. ; Tintoré J.
刊名: Geophysical Research Letters
ISSN: 0094-9032
EISSN: 1944-8763
出版年: 2015
卷: 42, 期: 2 起始页码: 441
结束页码: 449
语种: 英语
英文关键词: Argo
; mesoscale vertical velocity
; primary production
; quasi-geostrophic dynamics
Scopus关键词: Dynamics
; Nutrients
; Ocean currents
; Velocity
; Argo
; Horizontal advection
; Mesoscale vertical velocity
; Net primary production
; Nutrient distributions
; Phytoplankton growth
; Primary production
; Quasigeostrophic dynamics
; Astrophysics
; advection
; flow velocity
; geostrophic flow
; growth rate
; gyre
; mesoscale motion
; net primary production
; phytoplankton
; vertical movement
; Atlantic Ocean
; Gulf Stream
英文摘要: We analyze 12-years of mesoscale vertical motion derived from an observation-based product in the top 1000-m of the North West Atlantic Ocean. Vertical velocities (O(10-m-d-1)) associated with Gulf Stream instabilities consist of alternating cells of upwelling and downwelling. Here we show that the magnitude of the vertical motions decays exponentially southward with an e-folding length scale that is informative on the dynamics of the system. We further investigate the impact of the vertical supply of nutrients about phytoplankton growth with a conceptual model incorporating the mean effect of nutrient distribution, quasi-geostrophic dynamics, and Ekman suction/pumping. Results confirm that the mean effect of mesoscale vertical velocity variability alone can sustain observed levels of net primary production in the immediate vicinity of the Gulf Stream, while other mechanisms, including horizontal advection and submesoscale dynamics, need to be considered when moving toward the subtropical gyre. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923561528&doi=10.1002%2f2014GL062569&partnerID=40&md5=275c6858af4428d5763666581aad5f34
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8648
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Instituto Mediterráneo de Estudios Avanzados, IMEDEA(CSIC-UIB), Majorca, Spain
Recommended Citation:
Pascual A.,Ruiz S.,Buongiorno Nardelli B.,et al. Net primary production in the Gulf Stream sustained by quasi-geostrophic vertical exchanges[J]. Geophysical Research Letters,2015-01-01,42(2).