| DOI: | 10.1002/2016GL067905
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| 论文题名: | Volcanic ash as an oceanic iron source and sink |
| 作者: | Rogan N.; Achterberg E.P.; Le Moigne F.A.C.; Marsay C.M.; Tagliabue A.; Williams R.G.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9188
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| EISSN: | 1944-8919
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| 出版年: | 2016
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| 卷: | 43, 期:6 | | 起始页码: | 2732
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| 结束页码: | 2740
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| 语种: | 英语
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| 英文关键词: | Eyjafjallajökull
; iron
; modeling
; particle scavenging
; thorium
; volcanic ash
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| Scopus关键词: | Bioactivity
; Catchments
; Deposition
; Iron
; Models
; Surface waters
; Thorium
; Growing season
; Lithogenic material
; Microbial communities
; Model simulation
; Natural sources
; Particle scavenging
; Volcanic ash
; Volcanic eruptions
; Volcanoes
; biogeochemical cycle
; biological analysis
; growing season
; iron
; microbial community
; particle size
; saturation
; scavenging (chemistry)
; source-sink dynamics
; surface water
; thorium
; volcanic ash
; volcanic eruption
; Atlantic Ocean
; Atlantic Ocean (North)
; Eyjafjallajokull
; Iceland
|
| 英文摘要: | Volcanic ash deposition to the ocean forms a natural source of iron (Fe) to surface water microbial communities. Inputs of lithogenic material may also facilitate Fe removal through scavenging. Combining dissolved Fe (dFe) and thorium-234 observations alongside modeling, we investigate scavenging of Fe in the North Atlantic following the Eyjafjallajökull volcanic eruption. Under typical conditions biogenic particles dominate scavenging, whereas ash particles dominate during the eruption. The size of particles is important as smaller scavenging particles can become saturated with surface-associated ions. Model simulations indicate that ash deposition associated with Eyjafjallajökull likely led to net Fe removal. Our model suggests a threefold greater stimulation of biological activity if ash deposition had occurred later in the growing season when the region was Fe limited. The implications of ash particle scavenging, eruption timing, and particle saturation need to be considered when assessing the impact of ash deposition on the ocean Fe cycle and productivity. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977957561&doi=10.1002%2f2016GL067905&partnerID=40&md5=3002cddeac6660efdbba132e1f1e381f
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10151
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| 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: | GEOMAR, Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
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| Recommended Citation: | |
Rogan N.,Achterberg E.P.,Le Moigne F.A.C.,et al. Volcanic ash as an oceanic iron source and sink[J]. Geophysical Research Letters,2016-01-01,43(6).
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