Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf
Highlights • Fe-binding ligands associated with primary productivity together with ligands from the Arctic Ocean are the main sources of Fe-binding ligands in surface waters of Fram Strait. • Fe-binding ligands are present in a high concentrations in front of the glacier terminus, but the ligands ha...
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2020
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Online Access: | https://oceanrep.geomar.de/id/eprint/49596/ https://oceanrep.geomar.de/id/eprint/49596/1/Ardiningsih.pdf https://oceanrep.geomar.de/id/eprint/49596/7/354863.pdf https://doi.org/10.1016/j.marchem.2020.103815 |
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ftoceanrep:oai:oceanrep.geomar.de:49596 2023-05-15T14:50:05+02:00 Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf Ardiningsih, Indah Krisch, Stephan Lodeiro, Pablo Reichart, Gert-Jan Achterberg, Eric P. Gledhill, Martha Middag, Rob Gerringa, Loes J.A. 2020-05-01 text https://oceanrep.geomar.de/id/eprint/49596/ https://oceanrep.geomar.de/id/eprint/49596/1/Ardiningsih.pdf https://oceanrep.geomar.de/id/eprint/49596/7/354863.pdf https://doi.org/10.1016/j.marchem.2020.103815 en eng Elsevier https://oceanrep.geomar.de/id/eprint/49596/1/Ardiningsih.pdf https://oceanrep.geomar.de/id/eprint/49596/7/354863.pdf Ardiningsih, I., Krisch, S. , Lodeiro, P. , Reichart, G. J., Achterberg, E. P. , Gledhill, M. , Middag, R. and Gerringa, L. J. A. (2020) Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf. Open Access Marine Chemistry, 224 (Article number 103815). DOI 10.1016/j.marchem.2020.103815 <https://doi.org/10.1016/j.marchem.2020.103815>. doi:10.1016/j.marchem.2020.103815 info:eu-repo/semantics/openAccess Article PeerReviewed 2020 ftoceanrep https://doi.org/10.1016/j.marchem.2020.103815 2023-04-07T15:50:27Z Highlights • Fe-binding ligands associated with primary productivity together with ligands from the Arctic Ocean are the main sources of Fe-binding ligands in surface waters of Fram Strait. • Fe-binding ligands are present in a high concentrations in front of the glacier terminus, but the ligands have a relatively low binding capacity, thus less reactive. • Low binding strength coupled with low competing strength of ligands result in a higher inorganic Fe concentration, causing Fe to precipitate or scavenged. Abstract There is a paucity of data on Fe-binding ligands in the Arctic Ocean. Here we investigate the distribution and chemical properties of natural Fe-binding ligands in Fram Strait and over the northeast Greenland shelf, shedding light on their potential sources and transport. Our results indicate that the main sources of organic ligands to surface waters of Fram Strait included primary productivity and supply from the Arctic Ocean. We calculated the mean total Fe-binding ligand concentration, [Lt], in Polar Surface Water from the western Fram Strait to be 1.65 ± 0.4 nM eq. Fe. This value is in between reported values for the Arctic and North Atlantic Oceans, confirming reports of north to south decreases in [Lt] from the Arctic Ocean. The differences between ligand sources in different biogeochemical provinces, resulted in distinctive ligand properties and distributions that are reflected in [Lt], binding strength (log KFe'L′) and competing strength (log αFe'L) of ligands. Higher [Lt] was present near the Nioghalvfjerdsfjorden (79 N) Glacier terminus and in the Westwind Trough (median of [Lt] = 2.17 nM eq. Fe; log KFe'L′ = 12.3; log αFe'L = 3.4) than in the Norske Trough (median of [Lt] = 1.89 nM eq. Fe; log KFe'L′= 12.8; log αFe'L = 3.8) and in Fram Strait (median of [Lt] = 1.38 nM eq. Fe; log KFe'L′ = 13; log αFe'L= 3.9). However, organic ligands near the 79 N Glacier terminus and in the Westwind Trough were weaker, and therefore less reactive than organic ligands in the Norske Trough and in Fram ... Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait glacier Greenland Nioghalvfjerdsfjorden North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Greenland Nioghalvfjerdsfjorden ENVELOPE(-21.500,-21.500,79.500,79.500) Marine Chemistry 224 103815 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights • Fe-binding ligands associated with primary productivity together with ligands from the Arctic Ocean are the main sources of Fe-binding ligands in surface waters of Fram Strait. • Fe-binding ligands are present in a high concentrations in front of the glacier terminus, but the ligands have a relatively low binding capacity, thus less reactive. • Low binding strength coupled with low competing strength of ligands result in a higher inorganic Fe concentration, causing Fe to precipitate or scavenged. Abstract There is a paucity of data on Fe-binding ligands in the Arctic Ocean. Here we investigate the distribution and chemical properties of natural Fe-binding ligands in Fram Strait and over the northeast Greenland shelf, shedding light on their potential sources and transport. Our results indicate that the main sources of organic ligands to surface waters of Fram Strait included primary productivity and supply from the Arctic Ocean. We calculated the mean total Fe-binding ligand concentration, [Lt], in Polar Surface Water from the western Fram Strait to be 1.65 ± 0.4 nM eq. Fe. This value is in between reported values for the Arctic and North Atlantic Oceans, confirming reports of north to south decreases in [Lt] from the Arctic Ocean. The differences between ligand sources in different biogeochemical provinces, resulted in distinctive ligand properties and distributions that are reflected in [Lt], binding strength (log KFe'L′) and competing strength (log αFe'L) of ligands. Higher [Lt] was present near the Nioghalvfjerdsfjorden (79 N) Glacier terminus and in the Westwind Trough (median of [Lt] = 2.17 nM eq. Fe; log KFe'L′ = 12.3; log αFe'L = 3.4) than in the Norske Trough (median of [Lt] = 1.89 nM eq. Fe; log KFe'L′= 12.8; log αFe'L = 3.8) and in Fram Strait (median of [Lt] = 1.38 nM eq. Fe; log KFe'L′ = 13; log αFe'L= 3.9). However, organic ligands near the 79 N Glacier terminus and in the Westwind Trough were weaker, and therefore less reactive than organic ligands in the Norske Trough and in Fram ... |
format |
Article in Journal/Newspaper |
author |
Ardiningsih, Indah Krisch, Stephan Lodeiro, Pablo Reichart, Gert-Jan Achterberg, Eric P. Gledhill, Martha Middag, Rob Gerringa, Loes J.A. |
spellingShingle |
Ardiningsih, Indah Krisch, Stephan Lodeiro, Pablo Reichart, Gert-Jan Achterberg, Eric P. Gledhill, Martha Middag, Rob Gerringa, Loes J.A. Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf |
author_facet |
Ardiningsih, Indah Krisch, Stephan Lodeiro, Pablo Reichart, Gert-Jan Achterberg, Eric P. Gledhill, Martha Middag, Rob Gerringa, Loes J.A. |
author_sort |
Ardiningsih, Indah |
title |
Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf |
title_short |
Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf |
title_full |
Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf |
title_fullStr |
Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf |
title_full_unstemmed |
Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf |
title_sort |
natural fe-binding organic ligands in fram strait and over the northeast greenland shelf |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://oceanrep.geomar.de/id/eprint/49596/ https://oceanrep.geomar.de/id/eprint/49596/1/Ardiningsih.pdf https://oceanrep.geomar.de/id/eprint/49596/7/354863.pdf https://doi.org/10.1016/j.marchem.2020.103815 |
long_lat |
ENVELOPE(-21.500,-21.500,79.500,79.500) |
geographic |
Arctic Arctic Ocean Greenland Nioghalvfjerdsfjorden |
geographic_facet |
Arctic Arctic Ocean Greenland Nioghalvfjerdsfjorden |
genre |
Arctic Arctic Ocean Fram Strait glacier Greenland Nioghalvfjerdsfjorden North Atlantic |
genre_facet |
Arctic Arctic Ocean Fram Strait glacier Greenland Nioghalvfjerdsfjorden North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/49596/1/Ardiningsih.pdf https://oceanrep.geomar.de/id/eprint/49596/7/354863.pdf Ardiningsih, I., Krisch, S. , Lodeiro, P. , Reichart, G. J., Achterberg, E. P. , Gledhill, M. , Middag, R. and Gerringa, L. J. A. (2020) Natural Fe-binding organic ligands in Fram Strait and over the Northeast Greenland shelf. Open Access Marine Chemistry, 224 (Article number 103815). DOI 10.1016/j.marchem.2020.103815 <https://doi.org/10.1016/j.marchem.2020.103815>. doi:10.1016/j.marchem.2020.103815 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.marchem.2020.103815 |
container_title |
Marine Chemistry |
container_volume |
224 |
container_start_page |
103815 |
_version_ |
1766321158997671936 |