DOI: 10.1002/2013GL058817
论文题名: The importance of shallow hydrothermal island arc systems in ocean biogeochemistry
作者: Hawkes J.A. ; Connelly D.P. ; Rijkenberg M.J.A. ; Achterberg E.P.
刊名: Geophysical Research Letters
ISSN: 0094-10387
EISSN: 1944-10118
出版年: 2014
卷: 41, 期: 3 起始页码: 942
结束页码: 947
语种: 英语
英文关键词: caldera
; colloid
; hydrothermal
; iron
; island arc
; scavenging
Scopus关键词: Biogeochemistry
; Effluents
; Iron
; Iron compounds
; Manganese
; Ocean currents
; Photosynthesis
; Phytoplankton
; Scavenging
; caldera
; Co-precipitates
; hydrothermal
; Hydrothermal fluids
; Island arc
; Mid-ocean ridges
; Ocean biogeochemistry
; Primary productivity
; Colloids
; biogeochemistry
; colloid
; effluent
; fractionation
; hydrothermal vent
; metal
; mid-ocean ridge
; primary production
; shallow water
; Alaska
; Aleutian Islands
; Fox Islands
; Okmok Volcano
; Umnak Island
; United States
英文摘要: Hydrothermal venting often occurs at submarine volcanic calderas on island arc chains, typically at shallower depths than mid-ocean ridges. The effect of these systems on ocean biogeochemistry has been under-investigated to date. Here we show that hydrothermal effluent from an island arc caldera was rich in Fe(III) colloids (0.02-0.2 μm; 46% of total Fe), contributing to a fraction of hydrothermal Fe that was stable in ocean water. Iron(III) colloids from island arc calderas may be transferred into surrounding waters (generally 0-1500 m depth) by ocean currents, thereby potentially stimulating surface ocean primary productivity. Hydrothermal Fe oxyhydroxide particles (>0.2 μm) were also pervasive in the studied caldera and contained high concentrations of oxyanions of phosphorus (P), vanadium (V), arsenic (As), and manganese (Mn). Hydrothermal island arcs may be responsible for > 50% of global hydrothermal P scavenging and > 40% V scavenging, despite representing <10% of global hydrothermal fluid flow. Key Points A large portion of iron from hydrothermal island arc calderas exists as colloids These colloids coprecipitate important amounts of dissolved oxyanions Iron colloids from hydrothermal island arcs may stimulate primary productivity ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893637208&doi=10.1002%2f2013GL058817&partnerID=40&md5=336579e0dc9df95627d759bb86f06d2f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7651
Appears in Collections: 气候减缓与适应
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作者单位: Ocean and Earth Science, NOCS, University of Southampton, Southampton, United Kingdom
Recommended Citation:
Hawkes J.A.,Connelly D.P.,Rijkenberg M.J.A.,et al. The importance of shallow hydrothermal island arc systems in ocean biogeochemistry[J]. Geophysical Research Letters,2014-01-01,41(3).