DOI: 10.1002/2014GB005026
Scopus记录号: 2-s2.0-84939270918
论文题名: Water mass mixing: The dominant control on the zinc distribution in the North Atlantic Ocean
作者: Roshan S ; , Wu J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 7 起始页码: 1060
结束页码: 1074
语种: 英语
英文关键词: mixing
; North Atlantic
; silicic acid
; zinc
Scopus关键词: correlation
; dissolved organic matter
; hydrothermal activity
; mixing
; numerical model
; oxygen
; remineralization
; silicic acid
; water mass
; zinc
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Dissolved zinc (dZn) concentration was determined in the North Atlantic during the U.S. GEOTRACES 2010 and 2011 cruise (GOETRACES GA03). A relatively poor linear correlation (R20.756) was observed between dZn and silicic acid (Si), the slope of which was 0.0577nM/μmol/kg. We attribute the relatively poor dZn-Si correlation to the following processes: (a) differential regeneration of zinc relative to silicic acid, (b) mixing of multiple water masses that have different Zn/Si, and (c) zinc sources such as sedimentary or hydrothermal. To quantitatively distinguish these possibilities, we use the results of Optimum Multi-Parameter Water Mass Analysis by Jenkins et al. (2015) to model the zinc distribution below 500m. We hypothesized two scenarios: conservative mixing and regenerative mixing. The first scenario (conservative) could be modeled to results in a correlation with observations with a R20.846. In the second scenario, we took a Si-related regeneration into account, which could model the observations with a R20.867. Through this regenerative mixing scenario, we estimated a Zn/Si0.0548nM/μmol/kg that may be more realistic than linear regression slope due to accounting for process b. However, this did not improve the model substantially (R20.867 versus0.846), which may indicate the insignificant effect of remineralization on the zinc distribution in this region. The relative weakness in the model-observation correlation (R2~0.85 for both scenarios) implies that processes (a) and (c) may be plausible. Furthermore, dZn in the upper 500m exhibited a very poor correlation with apparent oxygen utilization, suggesting a minimal role for the organic matter-associated remineralization process. Key Points Dissolved zinc shows a relatively weak correlation with silicic acid in the North Atlantic Dissolved zinc in the North Atlantic is mainly controlled by water mass mixing Some water mass end-members exhibit deviations in the Zn-Si correlation ©2015. 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/77969
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Rosenstiel School of Marine and Atmospheric Science, University of Miami, Coral Gables, FL, United States
Recommended Citation:
Roshan S,, Wu J. Water mass mixing: The dominant control on the zinc distribution in the North Atlantic Ocean[J]. Global Biogeochemical Cycles,2015-01-01,29(7)