期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 5, 页码 921-926出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50221
关键词
iron fertilization; volcanic eruption; Eyjafjallajokull Volcano
资金
- NERC [NE/E006833/1, NE/G013055/1]
- Natural Environment Research Council [noc010009, NE/E005489/1, NE/E006833/1, NE/G013055/1] Funding Source: researchfish
- NERC [NE/E006833/1, NE/G013055/1, NE/E005489/1, noc010009] Funding Source: UKRI
Aerosol deposition from the 2010 eruption of the Icelandic volcano Eyjafjallajokull resulted in significant dissolved iron (DFe) inputs to the Iceland Basin of the North Atlantic. Unique ship-board measurements indicated strongly enhanced DFe concentrations (up to 10nM) immediately under the ash plume. Bioassay experiments performed with ash collected at sea under the plume also demonstrated the potential for associated Fe release to stimulate phytoplankton growth and nutrient drawdown. Combining Fe dissolution measurements with modeled ash deposition suggested that the eruption had the potential to increase DFe by >0.2nM over an area of up to 570,000km2. Although satellite ocean color data only indicated minor increases in phytoplankton abundance over a relatively constrained area, comparison of in situ nitrate concentrations with historical records suggested that ash deposition may have resulted in enhanced major nutrient drawdown. Our observations thus suggest that the 2010 Eyjafjallajokull eruption resulted in a significant perturbation to the biogeochemistry of the Iceland Basin.
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