globalchange  > 气候变化事实与影响
DOI: 10.1002/2015GB005177
Scopus记录号: 2-s2.0-84941873747
论文题名:
Soluble iron inputs to the Southern Ocean through recent andesitic to rhyolitic volcanic ash eruptions from the Patagonian Andes
作者: Simonella L; E; , Palomeque M; E; , Croot P; L; , Stein A; , Kupczewski M; , Rosales A; , Montes M; L; , Colombo F; , García M; G; , Villarosa G; , Gaiero D; M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:8
起始页码: 1125
结束页码: 1144
语种: 英语
英文关键词: dust ; iron ; Patagonia ; Southern Ocean ; volcanic ash
Scopus关键词: algal bloom ; andesite ; chemical composition ; cloud water ; dust ; growth rate ; iron ; liberalism ; phytoplankton ; rhyolite ; solubility ; volcanic ash ; volcanic eruption ; wind direction ; Andes ; Patagonia ; Southern Ocean
英文摘要: Patagonia, due to its geographic position and the dominance of westerly winds, is a key area that contributes to the supply of nutrients to the Southern Ocean, both through mineral dust and through the periodic deposits of volcanic ash. Here we evaluate the characteristics of Fe dissolved (into soluble and colloidal species) from volcanic ash for three recent southern Andes volcanic eruptions having contrasting features and chemical compositions. Contact between cloud waters (wet deposition) and end-members of andesitic (Hudson volcano) and rhyolitic (Chaitén volcano) materials was simulated. Results indicate higher Fe release and faster liberation rates in the andesitic material. Fe release during particle-seawater interaction (dry deposition) has higher rates in rhyolitic-type ashes. Rhyolitic ashes under acidic conditions release Fe in higher amounts and at a slower rate, while in those samples containing mostly glass shards, Fe release was lower and faster. The 2011 Puyehue eruption was observed by a dust monitoring station. Puyehue-type eruptions can contribute soluble Fe to the ocean via dry or wet deposition, nearly reaching the limit required for phytoplankton growth. In contrast, the input of Fe after processing by an acidic eruption plume could raise the amount of dissolved Fe in surface ocean waters several times, above the threshold required to initiate phytoplankton blooms. A single eruption like the Puyehue one represents more than half of the yearly Fe flux contributed by dust. ©2015. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77954
Appears in Collections:气候变化事实与影响

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作者单位: Centro de Investigaciones en Ciencias de la Tierra (CONICET), FCEFyN-Universidad Nacional de Cõrdoba, Cõrdoba, Argentina; Earth and Ocean Sciences, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland; ERT, Inc., College Park, MD, United States; Departamento de Física, Facultad de Ingeniería, Universidad Nacional de la Patagonia San Juan Bosco, Trelew, Argentina; Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Instituto de Física la Plata-CONICET, La Plata, Argentina; INIBIOMA, CONICET, Universidad Nacional Del Comahue, Bariloche, Argentina

Recommended Citation:
Simonella L,E,, Palomeque M,et al. Soluble iron inputs to the Southern Ocean through recent andesitic to rhyolitic volcanic ash eruptions from the Patagonian Andes[J]. Global Biogeochemical Cycles,2015-01-01,29(8)
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