The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean
The availability of iron (Fe) can seasonally limit phytoplankton growth in the High Latitude North Atlantic (HLNA), greatly reducing the efficiency of the biological carbon pump. However, the spatial extent of seasonal iron limitation is not yet known. We present autumn nutrient and dissolved Fe mea...
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ftsouthampton:oai:eprints.soton.ac.uk:428253 2023-08-27T04:10:46+02:00 The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean Birchill, A.J. Hartner, N.T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S.J. Worsfold, P.J. Leopold, K. Painter, S.C. Lohan, M.C. 2019-12-01 text https://eprints.soton.ac.uk/428253/ https://eprints.soton.ac.uk/428253/1/s41598_018_37436_3.pdf en English eng https://eprints.soton.ac.uk/428253/1/s41598_018_37436_3.pdf Birchill, A.J., Hartner, N.T., Kunde, K., Siemering, B., Daniels, C., González-Santana, D., Milne, A., Ussher, S.J., Worsfold, P.J., Leopold, K., Painter, S.C. and Lohan, M.C. (2019) The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean. Scientific Reports, 9 (1), 1-12, [1435]. (doi:10.1038/s41598-018-37436-3 <http://dx.doi.org/10.1038/s41598-018-37436-3>). cc_by_4 Article PeerReviewed 2019 ftsouthampton https://doi.org/10.1038/s41598-018-37436-3 2023-08-03T22:23:39Z The availability of iron (Fe) can seasonally limit phytoplankton growth in the High Latitude North Atlantic (HLNA), greatly reducing the efficiency of the biological carbon pump. However, the spatial extent of seasonal iron limitation is not yet known. We present autumn nutrient and dissolved Fe measurements, combined with microphytoplankton distribution, of waters overlying the Hebridean (Scottish) shelf break. A distinct biogeochemical divide was observed, with Fe deficient surface waters present beyond the shelf break, much further eastwards than previously recognised. Due to along and on-shelf circulation, the Hebridean shelf represents a much-localised source of Fe, which does not fertilise the wider HLNA. Shelf sediments are generally thought to supply large quantities of Fe to overlying waters. However, for this Fe to influence upper-ocean biogeochemical cycling, efficient off-shelf transport mechanisms are required. This work challenges the view that the oceanic surface waters in close proximity to continental margins are iron replete with respect to marine primary production demands. Article in Journal/Newspaper North Atlantic University of Southampton: e-Prints Soton Hebridean Shelf ENVELOPE(-5.500,-5.500,59.250,59.250) Scientific Reports 9 1 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The availability of iron (Fe) can seasonally limit phytoplankton growth in the High Latitude North Atlantic (HLNA), greatly reducing the efficiency of the biological carbon pump. However, the spatial extent of seasonal iron limitation is not yet known. We present autumn nutrient and dissolved Fe measurements, combined with microphytoplankton distribution, of waters overlying the Hebridean (Scottish) shelf break. A distinct biogeochemical divide was observed, with Fe deficient surface waters present beyond the shelf break, much further eastwards than previously recognised. Due to along and on-shelf circulation, the Hebridean shelf represents a much-localised source of Fe, which does not fertilise the wider HLNA. Shelf sediments are generally thought to supply large quantities of Fe to overlying waters. However, for this Fe to influence upper-ocean biogeochemical cycling, efficient off-shelf transport mechanisms are required. This work challenges the view that the oceanic surface waters in close proximity to continental margins are iron replete with respect to marine primary production demands. |
format |
Article in Journal/Newspaper |
author |
Birchill, A.J. Hartner, N.T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S.J. Worsfold, P.J. Leopold, K. Painter, S.C. Lohan, M.C. |
spellingShingle |
Birchill, A.J. Hartner, N.T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S.J. Worsfold, P.J. Leopold, K. Painter, S.C. Lohan, M.C. The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
author_facet |
Birchill, A.J. Hartner, N.T. Kunde, K. Siemering, B. Daniels, C. González-Santana, D. Milne, A. Ussher, S.J. Worsfold, P.J. Leopold, K. Painter, S.C. Lohan, M.C. |
author_sort |
Birchill, A.J. |
title |
The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_short |
The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_full |
The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_fullStr |
The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_full_unstemmed |
The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean |
title_sort |
eastern extent of seasonal iron limitation in the high latitude north atlantic ocean |
publishDate |
2019 |
url |
https://eprints.soton.ac.uk/428253/ https://eprints.soton.ac.uk/428253/1/s41598_018_37436_3.pdf |
long_lat |
ENVELOPE(-5.500,-5.500,59.250,59.250) |
geographic |
Hebridean Shelf |
geographic_facet |
Hebridean Shelf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://eprints.soton.ac.uk/428253/1/s41598_018_37436_3.pdf Birchill, A.J., Hartner, N.T., Kunde, K., Siemering, B., Daniels, C., González-Santana, D., Milne, A., Ussher, S.J., Worsfold, P.J., Leopold, K., Painter, S.C. and Lohan, M.C. (2019) The eastern extent of seasonal iron limitation in the high latitude North Atlantic Ocean. Scientific Reports, 9 (1), 1-12, [1435]. (doi:10.1038/s41598-018-37436-3 <http://dx.doi.org/10.1038/s41598-018-37436-3>). |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1038/s41598-018-37436-3 |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1775353075404374016 |