Flocculated meltwater particles control Arctic land-sea fluxes of labile iron
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Flocculated meltwater particles control Arctic land-sea fluxes of labile iron. / Markussen, Thor Nygaard; Elberling, Bo; Winter, Christian; Andersen, Thorbjørn Joest.
In: Scientific Reports, Vol. 6, 24033, 06.04.2016.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Flocculated meltwater particles control Arctic land-sea fluxes of labile iron
AU - Markussen, Thor Nygaard
AU - Elberling, Bo
AU - Winter, Christian
AU - Andersen, Thorbjørn Joest
N1 - CENPERMOA[2016]
PY - 2016/4/6
Y1 - 2016/4/6
N2 - Glacial meltwater systems supply the Arctic coastal ocean with large volumes of sediment and potentially bioavailable forms of iron, nitrogen and carbon. The particulate fraction of this supply is significant but estuarine losses have been thought to limit the iron supply from land. Here, our results reveal how flocculation (particle aggregation) involving labile iron may increase horizontal transport rather than enhance deposition close to the source. This is shown by combining field observations in Disko Fjord, West Greenland, and laboratory experiments. Our data show how labile iron affects floc sizes, shapes and densities and consequently yields low settling velocities and extended sediment plumes. We highlight the importance of understanding the flocculation mechanisms when examining fluxes of meltwater transported iron in polar regions today and in the future, and we underline the influence of terrestrial hotspots on the nutrient and solute cycles in Arctic coastal waters.
AB - Glacial meltwater systems supply the Arctic coastal ocean with large volumes of sediment and potentially bioavailable forms of iron, nitrogen and carbon. The particulate fraction of this supply is significant but estuarine losses have been thought to limit the iron supply from land. Here, our results reveal how flocculation (particle aggregation) involving labile iron may increase horizontal transport rather than enhance deposition close to the source. This is shown by combining field observations in Disko Fjord, West Greenland, and laboratory experiments. Our data show how labile iron affects floc sizes, shapes and densities and consequently yields low settling velocities and extended sediment plumes. We highlight the importance of understanding the flocculation mechanisms when examining fluxes of meltwater transported iron in polar regions today and in the future, and we underline the influence of terrestrial hotspots on the nutrient and solute cycles in Arctic coastal waters.
U2 - 10.1038/srep24033
DO - 10.1038/srep24033
M3 - Journal article
C2 - 27050673
VL - 6
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 24033
ER -
ID: 167888265