Publication Abstracts

Arrigo et al. 2017

Arrigo, K.R., G.L. van Dijken, R.M. Castelao, H. Luo, Å.K. Rennermalm, M. Tedesco, T.L. Mote, H. Oliver, and P.L. Yager, 2017: Melting glaciers stimulate large summer phytoplankton blooms in southwest Greenland waters. Geophys. Res. Lett., 44, no. 12, 6278-6285, doi:10.1002/2017GL073583.

Each summer, large quantities of freshwater and associated dissolved and particulate material are released from the Greenland Ice Sheet (GrIS) into local fjords where they promote local phytoplankton growth. Whether the influx of freshwater and associated micronutrients in glacial meltwater is able to stimulate phytoplankton growth beyond the fjords is disputed, however. Here we show that the arrival of freshwater discharge from outlet glaciers from both southeast and southwest GrIS coincides with large-scale blooms in the Labrador Sea that extend over 300 km from the coast during summer. This summer bloom develops about a week after the arrival of glacial meltwater in early July and persists until the input of glacial meltwater slows in August or September, accounting for ∼40% of annual net primary production for the area. In view of the absence of a significant change in the depth of the mixed layer associated with the arrival of glacial meltwater to the Labrador Sea, we suggest that the increase in phytoplankton biomass and productivity in summer is likely driven by a greater nutrient supply (most likely iron). Our results highlight that the ecological impact of meltwater from the GrIS likely extends far beyond the boundaries of the local fjords, encompassing much of the eastern Labrador Sea. Such impacts may increase if melting of the GrIS accelerates as predicted.

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BibTeX Citation

  author={Arrigo, K. R. and van Dijken, G. L. and Castelao, R. M. and Luo, H. and Rennermalm, Å. K. and Tedesco, M. and Mote, T. L. and Oliver, H. and Yager, P. L.},
  title={Melting glaciers stimulate large summer phytoplankton blooms in southwest Greenland waters},
  journal={Geophysical Research Letters},

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RIS Citation

ID  - ar08100s
AU  - Arrigo, K. R.
AU  - van Dijken, G. L.
AU  - Castelao, R. M.
AU  - Luo, H.
AU  - Rennermalm, Å. K.
AU  - Tedesco, M.
AU  - Mote, T. L.
AU  - Oliver, H.
AU  - Yager, P. L.
PY  - 2017
TI  - Melting glaciers stimulate large summer phytoplankton blooms in southwest Greenland waters
JA  - Geophys. Res. Lett.
JO  - Geophysical Research Letters
VL  - 44
IS  - 12
SP  - 6278
EP  - 6285
DO  - 10.1002/2017GL073583
ER  -

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