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Biogeochemical Properties and Transports in the North East Atlantic.

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Title: Biogeochemical Properties and Transports in the North East Atlantic.
Authors: Johnson, Clare1 clare.johnson@sams.ac.uk, Fraser, Neil1, Cunningham, Stuart1, Burmeister, Kristin1, Jones, Sam1, Drysdale, Lewis1, Abell, Richard1, Brown, Peter2, Dumont, Estelle1, Fox, Alan1, Holliday, N. Penny2, Inall, Mark1, Reed, Sarah1,3
Source: Journal of Geophysical Research. Oceans. Apr2024, Vol. 129 Issue 4, p1-18. 18p.
Subject Terms: *Phosphates, *Intracoastal waterways, Oxygen saturation, Autumn, Deep-sea moorings
Geographic Terms: Arctic regions
Abstract: The eastern subpolar North Atlantic is a source of nutrients to the Northwest European Shelf and Arctic; however, biogeochemical transports in this important region are unknown. We examine variability in nutrients and carbon at the eastern boundary of the subpolar North Atlantic between 2017 and 2020, and calculate their transport by a branch of the North Atlantic Current and the European Slope Current. By combining observations from moorings and ship‐based surveys, we derive novel biogeochemical property transports at high temporal resolution. Data from 63 m provide new evidence of a strong seasonal signal with silicate declining between April and May (− 2.3 μmol kg− 1 ) and a concurrent increase in pH (0.04) and oxygen saturation (3.5%). Additionally, pH and oxygen saturation show a secondary peak in October during the autumn bloom. Biogeochemical transports are northwards and highly variable with volume transport dominating the variability over a multi‐annual timescale. However, historical data suggests that nitrate and phosphate transports were 15% and 19% lower respectively in the late 2000s when the subpolar gyre circulation was weaker and lower nutrient source waters were dominant. These changes may have been amplified by concurrent reductions in volume transport. Changes in carbon and nutrient transports in the eastern subpolar North Atlantic may propagate downstream with potential effects on the Northwest European Shelf and Eurasian Arctic. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Oceans is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Biogeochemical Properties and Transports in the North East Atlantic.
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  Data: <searchLink fieldCode="AR" term="%22Johnson%2C+Clare%22">Johnson, Clare</searchLink><relatesTo>1</relatesTo><i> clare.johnson@sams.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Fraser%2C+Neil%22">Fraser, Neil</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cunningham%2C+Stuart%22">Cunningham, Stuart</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burmeister%2C+Kristin%22">Burmeister, Kristin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jones%2C+Sam%22">Jones, Sam</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Drysdale%2C+Lewis%22">Drysdale, Lewis</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Abell%2C+Richard%22">Abell, Richard</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Brown%2C+Peter%22">Brown, Peter</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Dumont%2C+Estelle%22">Dumont, Estelle</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fox%2C+Alan%22">Fox, Alan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Holliday%2C+N%2E+Penny%22">Holliday, N. Penny</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Inall%2C+Mark%22">Inall, Mark</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Reed%2C+Sarah%22">Reed, Sarah</searchLink><relatesTo>1,3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Oceans%22">Journal of Geophysical Research. Oceans</searchLink>. Apr2024, Vol. 129 Issue 4, p1-18. 18p.
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  Data: *<searchLink fieldCode="DE" term="%22Phosphates%22">Phosphates</searchLink><br />*<searchLink fieldCode="DE" term="%22Intracoastal+waterways%22">Intracoastal waterways</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+saturation%22">Oxygen saturation</searchLink><br /><searchLink fieldCode="DE" term="%22Autumn%22">Autumn</searchLink><br /><searchLink fieldCode="DE" term="%22Deep-sea+moorings%22">Deep-sea moorings</searchLink>
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  Data: The eastern subpolar North Atlantic is a source of nutrients to the Northwest European Shelf and Arctic; however, biogeochemical transports in this important region are unknown. We examine variability in nutrients and carbon at the eastern boundary of the subpolar North Atlantic between 2017 and 2020, and calculate their transport by a branch of the North Atlantic Current and the European Slope Current. By combining observations from moorings and ship‐based surveys, we derive novel biogeochemical property transports at high temporal resolution. Data from 63 m provide new evidence of a strong seasonal signal with silicate declining between April and May (− 2.3 μmol kg− 1 ) and a concurrent increase in pH (0.04) and oxygen saturation (3.5%). Additionally, pH and oxygen saturation show a secondary peak in October during the autumn bloom. Biogeochemical transports are northwards and highly variable with volume transport dominating the variability over a multi‐annual timescale. However, historical data suggests that nitrate and phosphate transports were 15% and 19% lower respectively in the late 2000s when the subpolar gyre circulation was weaker and lower nutrient source waters were dominant. These changes may have been amplified by concurrent reductions in volume transport. Changes in carbon and nutrient transports in the eastern subpolar North Atlantic may propagate downstream with potential effects on the Northwest European Shelf and Eurasian Arctic. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Geophysical Research. Oceans is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1029/2023JC020427
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 18
        StartPage: 1
    Subjects:
      – SubjectFull: Phosphates
        Type: general
      – SubjectFull: Intracoastal waterways
        Type: general
      – SubjectFull: Oxygen saturation
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      – SubjectFull: Autumn
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      – SubjectFull: Deep-sea moorings
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      – SubjectFull: Arctic regions
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      – TitleFull: Biogeochemical Properties and Transports in the North East Atlantic.
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              Text: Apr2024
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              Y: 2024
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