globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069523
论文题名:
Estimates of vertical turbulent mixing used to determine a vertical gradient in net and gross oxygen production in the oligotrophic South Pacific Gyre
作者: Haskell W.Z.; II; Prokopenko M.G.; Stanley R.H.R.; Knapp A.N.
刊名: Geophysical Research Letters
ISSN: 0094-8879
EISSN: 1944-8610
出版年: 2016
卷: 43, 期:14
起始页码: 7590
结束页码: 7599
语种: 英语
英文关键词: eddy diffusivity ; gross oxygen production (GOP) ; gross primary production (GPP) ; net community production (NCP) ; net oxygen production (NOP) ; South Pacific Gyre
Scopus关键词: Budget control ; Wind ; Eddy Diffusivities ; Gross primary production ; Net community productions ; Oxygen production ; South Pacific Gyre ; Oxygen
英文摘要: Mixed layer (ML) gross (GOP) and net (NOP) oxygen production rates based on in situ mass balances of triple oxygen isotopes (TOI) and O2/Ar are influenced by vertical transport from below, a term traditionally difficult to constrain. Here we present a new approach to estimate vertical eddy diffusivity (Kz) based on density gradients in the upper thermocline and wind speed-based rates of turbulent shear at the ML depth. As an example, we use this Kz, verified by an independent 7Be-based estimate, in an O2/TOI budget at a site in the oligotrophic South Pacific Gyre. NOP equaled 0.31 ± 0.16 mmol m−2 d−1 in the ML (~55–65 m depth) and 1.2 ± 0.4 mmol m−2 d−1 (80%) beneath the ML, while GOP equaled 74 ± 27 mmol m−2 d−1 (86%) in the ML and 12 ± 4 mmol m−2 d−1 (14%) below, revealing a vertical gradient in production rates unquantifiable without the Kz estimate. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979032316&doi=10.1002%2f2016GL069523&partnerID=40&md5=71458b3d4fbd150aadab475529851956
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9842
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: Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States

Recommended Citation:
Haskell W.Z.,II,Prokopenko M.G.,et al. Estimates of vertical turbulent mixing used to determine a vertical gradient in net and gross oxygen production in the oligotrophic South Pacific Gyre[J]. Geophysical Research Letters,2016-01-01,43(14).
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