DOI: 10.1002/2013GL058171
论文题名: Wind-driven nutrient pulses to the subsurface chlorophyll maximum in seasonally stratified shelf seas
作者: Williams C. ; Sharples J. ; Mahaffey C. ; Rippeth T.
刊名: Geophysical Research Letters
ISSN: 0094-8444
EISSN: 1944-8175
出版年: 2013
卷: 40, 期: 20 起始页码: 5467
结束页码: 5472
语种: 英语
英文关键词: carbon
; inertial oscillations
; new production
; nitrate
; turbulence
; wind
Scopus关键词: Carbon fixation
; Inertial oscillation
; New production
; Phytoplankton growth
; Sampling resolution
; Seasonal thermocline
; Turbulent dissipation
; Wind velocities
; Carbon
; Chlorophyll
; Mixing
; Turbulence
; Wind
; Nitrates
; carbon fixation
; carbon sink
; chlorophyll
; dissipation
; mixing
; nutrient
; phytoplankton
; sampling
; shelf sea
; summer
; thermocline
; turbulence
; wind forcing
; wind velocity
; Atlantic Ocean
; Celtic Sea
英文摘要: Shelf seas are an important global carbon sink. In the seasonal thermocline, the subsurface chlorophyll maximum (SCM) supports almost half of summer shelf production. Using observations from the seasonally stratified Celtic Sea (June 2010), we identify wind-driven inertial oscillations as a mechanism for supplying the SCM with the nitrate needed for phytoplankton growth and carbon fixation. Analysis of wind, currents, and turbulent dissipation indicates that inertial oscillations are triggered by a change in the wind velocity. High magnitude, short-lived dissipation spikes occur when the shear and wind vectors align, increasing the daily nitrate flux to the SCM by a factor of at least 17. However, it is likely that the sampling resolution of turbulent dissipation does not always capture the maximum wind-driven peak in mixing. We estimate that wind-driven inertial oscillations supply the SCM with ∼33% to 71% of the nitrate required for new production in shelf seas during summer. Key Points A change in the wind forcing causes inertially driven short-lived mixing events These are difficult to resolve but increase the daily nitrate flux 17-fold These events may support 33-71% of summer new production in shelf seas ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886574638&doi=10.1002%2f2013GL058171&partnerID=40&md5=890a724af1e77626001db57e9b073924
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5708
Appears in Collections: 气候减缓与适应
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作者单位: School of Environmental Sciences, University of Liverpool, Liverpool L69 3GP, United Kingdom
Recommended Citation:
Williams C.,Sharples J.,Mahaffey C.,et al. Wind-driven nutrient pulses to the subsurface chlorophyll maximum in seasonally stratified shelf seas[J]. Geophysical Research Letters,2013-01-01,40(20).