DOI: 10.1029/2018GB006034
论文题名: The Relationships Between Dissolved Zinc and Major Nutrients Phosphate and Silicate Along the GEOTRACES GA02 Transect in the West Atlantic Ocean
作者: Middag R. ; de Baar H.J.W. ; Bruland K.W.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期: 1 语种: 英语
英文关键词: biogeochemistry
; community composition
; dissolved matter
; mixing
; phosphate (inorganic)
; phytoplankton
; remineralization
; silicate
; spatial distribution
; zinc
; Atlantic Ocean
; Atlantic Ocean (West)
; Southern Ocean
学科: dissolved zinc
; GEOTRACES
; West Atlantic Ocean
中文摘要: Dissolved zinc (Zn) has a nutrient-type distribution in the ocean that more closely resembles the distribution of silicate (Si) than phosphate (PO 4 ). However, Zn is a trace-nutrient and mostly present in the organic fraction of phytoplankton rather than the siliceous frustule. It has been suggested the coupling of Zn and Si is caused by the strong depletion of nutrients in the Southern Ocean, possibly combined with scavenging of Zn. Here we assess the distribution of Zn and nutrients along the conduit of southward traveling waters of northern origin and northward traveling waters of Antarctic origin to unravel the influence of various water masses and local biogeochemical processes in the Atlantic Ocean. The distribution of Zn and Si is governed by mixing such that influence of remineralization is barely distinguishable, whereas the distribution of PO 4 is influenced by both processes. The subsurface water masses that supply nutrients to the surface ocean are depleted in Zn. Indeed, the Southern Ocean water masses play a driving role, but remarkably, also subsurface water masses from northern high-latitude origin are depleted in Zn. Both northern and southern high-latitude waters have a relatively high Zn:PO 4 uptake and remineralization ratio, implying it is Zn availability and not only chronic iron limitation that leads to increased Zn uptake in the high-latitude regions. The limited supply of Zn to the surface Atlantic Ocean can explain the lack of an Atlantic Zn remineralization signal and indicates Zn might play a role in phytoplankton community composition and productivity. ©2018. 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/160165
Appears in Collections: 气候变化与战略
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作者单位: Department of Ocean Systems (OCS), NIOZ Royal Netherlands Institute for Sea Research and Utrecht University, Texel, Netherlands; Department Ocean Ecosystems, University of Groningen, Netherlands; Department of Ocean Sciences and Institute of Marine Sciences, University of California Santa Cruz, Santa Cruz, CA, United States
Recommended Citation:
Middag R.,de Baar H.J.W.,Bruland K.W.. The Relationships Between Dissolved Zinc and Major Nutrients Phosphate and Silicate Along the GEOTRACES GA02 Transect in the West Atlantic Ocean[J]. Global Biogeochemical Cycles,2019-01-01,33(1)