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The future regime of Atlantic nutrient supply to the Northwest European Shelf.

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Title: The future regime of Atlantic nutrient supply to the Northwest European Shelf.
Authors: Mathis, M.1 moritz.mathis@mpimet.mpg.de, Elizalde, A.1 alberto.elizalde@uni-hamburg.de, Mikolajewicz, U.1 uwe.mikolajewicz@mpimet.mpg.de
Source: Journal of Marine Systems. Jan2019, Vol. 189, p98-115. 18p.
Subjects: Downscaling (Climatology), Ocean-atmosphere interaction, Computer simulation, Water masses, Nutrient pollution of water, Climate change
Abstract: Abstract Downscaling simulations for emission scenario RCP8.5 with a regionally coupled ocean-atmosphere climate system model indicate a regime shift in the dynamics of Atlantic nutrient supply to the Northwest European Shelf. Reduced winter convection in the Northeast Atlantic leads to a substantial decrease in upper ocean nutrient concentrations. Yet, vertical mixing processes at the shelf break maintain a connection to nutrient-enriched subpycnocline water masses and decouple the nutrient supply to the shelf from upper ocean conditions in the North Atlantic. As a consequence, primary production on the shelf does not weaken as strongly as it was expected from declining nutrient concentrations in the open ocean. Furthermore, nutrient fluxes to the shelf become increasingly variable due to a positive feedback between the winter mixed layer depth near the shelf break and the density of the upper water column, making the productivity on the shelf more sensitive to the major modes of variability in the North Atlantic. Highlights • Shoaling of Atlantic mixed layer invokes regime shift in on-shelf nutrient fluxes. • Mixing at the shelf break maintains connection to subpycnocline nutrient pool. • Primary production on the shelf does not weaken as strongly as expected. • Nutrient fluxes are more sensitive to major variability modes in the North Atlantic. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Marine Systems is the property of Elsevier B.V. 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 133189038
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: The future regime of Atlantic nutrient supply to the Northwest European Shelf.
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  Data: <searchLink fieldCode="AR" term="%22Mathis%2C+M%2E%22">Mathis, M.</searchLink><relatesTo>1</relatesTo><i> moritz.mathis@mpimet.mpg.de</i><br /><searchLink fieldCode="AR" term="%22Elizalde%2C+A%2E%22">Elizalde, A.</searchLink><relatesTo>1</relatesTo><i> alberto.elizalde@uni-hamburg.de</i><br /><searchLink fieldCode="AR" term="%22Mikolajewicz%2C+U%2E%22">Mikolajewicz, U.</searchLink><relatesTo>1</relatesTo><i> uwe.mikolajewicz@mpimet.mpg.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Marine+Systems%22">Journal of Marine Systems</searchLink>. Jan2019, Vol. 189, p98-115. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Downscaling+%28Climatology%29%22">Downscaling (Climatology)</searchLink><br /><searchLink fieldCode="DE" term="%22Ocean-atmosphere+interaction%22">Ocean-atmosphere interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Water+masses%22">Water masses</searchLink><br /><searchLink fieldCode="DE" term="%22Nutrient+pollution+of+water%22">Nutrient pollution of water</searchLink><br /><searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract Downscaling simulations for emission scenario RCP8.5 with a regionally coupled ocean-atmosphere climate system model indicate a regime shift in the dynamics of Atlantic nutrient supply to the Northwest European Shelf. Reduced winter convection in the Northeast Atlantic leads to a substantial decrease in upper ocean nutrient concentrations. Yet, vertical mixing processes at the shelf break maintain a connection to nutrient-enriched subpycnocline water masses and decouple the nutrient supply to the shelf from upper ocean conditions in the North Atlantic. As a consequence, primary production on the shelf does not weaken as strongly as it was expected from declining nutrient concentrations in the open ocean. Furthermore, nutrient fluxes to the shelf become increasingly variable due to a positive feedback between the winter mixed layer depth near the shelf break and the density of the upper water column, making the productivity on the shelf more sensitive to the major modes of variability in the North Atlantic. Highlights • Shoaling of Atlantic mixed layer invokes regime shift in on-shelf nutrient fluxes. • Mixing at the shelf break maintains connection to subpycnocline nutrient pool. • Primary production on the shelf does not weaken as strongly as expected. • Nutrient fluxes are more sensitive to major variability modes in the North Atlantic. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Marine Systems is the property of Elsevier B.V. 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: 10.1016/j.jmarsys.2018.10.002
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      – Code: eng
        Text: English
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        PageCount: 18
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      – SubjectFull: Downscaling (Climatology)
        Type: general
      – SubjectFull: Ocean-atmosphere interaction
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Water masses
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      – SubjectFull: Nutrient pollution of water
        Type: general
      – SubjectFull: Climate change
        Type: general
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      – TitleFull: The future regime of Atlantic nutrient supply to the Northwest European Shelf.
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            NameFull: Mathis, M.
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            NameFull: Elizalde, A.
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            NameFull: Mikolajewicz, U.
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              M: 01
              Text: Jan2019
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              Value: 189
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