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Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges
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| Zeitschriftentitel: | Global Biogeochemical Cycles |
|---|---|
| Personen und Körperschaften: | , , , , , , , |
| In: | Global Biogeochemical Cycles, 33, 2019, 8, S. 995-1009 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Tuerena, Robyn E. Williams, Richard G. Mahaffey, Claire Vic, Clément Green, J. A. Mattias Naveira‐Garabato, Alberto Forryan, Alexander Sharples, Jonathan Tuerena, Robyn E. Williams, Richard G. Mahaffey, Claire Vic, Clément Green, J. A. Mattias Naveira‐Garabato, Alberto Forryan, Alexander Sharples, Jonathan |
|---|---|
| author |
Tuerena, Robyn E. Williams, Richard G. Mahaffey, Claire Vic, Clément Green, J. A. Mattias Naveira‐Garabato, Alberto Forryan, Alexander Sharples, Jonathan |
| spellingShingle |
Tuerena, Robyn E. Williams, Richard G. Mahaffey, Claire Vic, Clément Green, J. A. Mattias Naveira‐Garabato, Alberto Forryan, Alexander Sharples, Jonathan Global Biogeochemical Cycles Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges Atmospheric Science General Environmental Science Environmental Chemistry Global and Planetary Change |
| author_sort |
tuerena, robyn e. |
| spelling |
Tuerena, Robyn E. Williams, Richard G. Mahaffey, Claire Vic, Clément Green, J. A. Mattias Naveira‐Garabato, Alberto Forryan, Alexander Sharples, Jonathan 0886-6236 1944-9224 American Geophysical Union (AGU) Atmospheric Science General Environmental Science Environmental Chemistry Global and Planetary Change http://dx.doi.org/10.1029/2019gb006214 <jats:title>Abstract</jats:title><jats:p>Diapycnal mixing of nutrients from the thermocline to the surface sunlit ocean is thought to be relatively weak in the world's subtropical gyres as energy inputs from winds are generally low. The interaction of internal tides with rough topography enhances diapycnal mixing, yet the role of tidally induced diapycnal mixing in sustaining nutrient supply to the surface subtropical ocean remains relatively unexplored. During a field campaign in the North Atlantic subtropical gyre, we tested whether tidal interactions with topography enhance diapycnal nitrate fluxes in the upper ocean. We measured an order of magnitude increase in diapycnal nitrate fluxes to the deep chlorophyll maximum (DCM) over the Mid‐Atlantic Ridge compared to the adjacent deep ocean. Internal tides drive this enhancement, with diapycnal nitrate supply to the DCM increasing by a factor of 8 between neap and spring tides. Using a global tidal dissipation database, we find that this spring‐neap enhancement in diapycnal nitrate fluxes is widespread over ridges and seamounts. Mid‐ocean ridges therefore play an important role in sustaining the nutrient supply to the DCM, and these findings may have important implications in a warming global ocean.</jats:p> Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges Global Biogeochemical Cycles |
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10.1029/2019gb006214 |
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| title |
Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_unstemmed |
Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_full |
Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_fullStr |
Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_full_unstemmed |
Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_short |
Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_sort |
internal tides drive nutrient fluxes into the deep chlorophyll maximum over mid‐ocean ridges |
| topic |
Atmospheric Science General Environmental Science Environmental Chemistry Global and Planetary Change |
| url |
http://dx.doi.org/10.1029/2019gb006214 |
| publishDate |
2019 |
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995-1009 |
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<jats:title>Abstract</jats:title><jats:p>Diapycnal mixing of nutrients from the thermocline to the surface sunlit ocean is thought to be relatively weak in the world's subtropical gyres as energy inputs from winds are generally low. The interaction of internal tides with rough topography enhances diapycnal mixing, yet the role of tidally induced diapycnal mixing in sustaining nutrient supply to the surface subtropical ocean remains relatively unexplored. During a field campaign in the North Atlantic subtropical gyre, we tested whether tidal interactions with topography enhance diapycnal nitrate fluxes in the upper ocean. We measured an order of magnitude increase in diapycnal nitrate fluxes to the deep chlorophyll maximum (DCM) over the Mid‐Atlantic Ridge compared to the adjacent deep ocean. Internal tides drive this enhancement, with diapycnal nitrate supply to the DCM increasing by a factor of 8 between neap and spring tides. Using a global tidal dissipation database, we find that this spring‐neap enhancement in diapycnal nitrate fluxes is widespread over ridges and seamounts. Mid‐ocean ridges therefore play an important role in sustaining the nutrient supply to the DCM, and these findings may have important implications in a warming global ocean.</jats:p> |
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| author | Tuerena, Robyn E., Williams, Richard G., Mahaffey, Claire, Vic, Clément, Green, J. A. Mattias, Naveira‐Garabato, Alberto, Forryan, Alexander, Sharples, Jonathan |
| author_facet | Tuerena, Robyn E., Williams, Richard G., Mahaffey, Claire, Vic, Clément, Green, J. A. Mattias, Naveira‐Garabato, Alberto, Forryan, Alexander, Sharples, Jonathan, Tuerena, Robyn E., Williams, Richard G., Mahaffey, Claire, Vic, Clément, Green, J. A. Mattias, Naveira‐Garabato, Alberto, Forryan, Alexander, Sharples, Jonathan |
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| description | <jats:title>Abstract</jats:title><jats:p>Diapycnal mixing of nutrients from the thermocline to the surface sunlit ocean is thought to be relatively weak in the world's subtropical gyres as energy inputs from winds are generally low. The interaction of internal tides with rough topography enhances diapycnal mixing, yet the role of tidally induced diapycnal mixing in sustaining nutrient supply to the surface subtropical ocean remains relatively unexplored. During a field campaign in the North Atlantic subtropical gyre, we tested whether tidal interactions with topography enhance diapycnal nitrate fluxes in the upper ocean. We measured an order of magnitude increase in diapycnal nitrate fluxes to the deep chlorophyll maximum (DCM) over the Mid‐Atlantic Ridge compared to the adjacent deep ocean. Internal tides drive this enhancement, with diapycnal nitrate supply to the DCM increasing by a factor of 8 between neap and spring tides. Using a global tidal dissipation database, we find that this spring‐neap enhancement in diapycnal nitrate fluxes is widespread over ridges and seamounts. Mid‐ocean ridges therefore play an important role in sustaining the nutrient supply to the DCM, and these findings may have important implications in a warming global ocean.</jats:p> |
| doi_str_mv | 10.1029/2019gb006214 |
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| imprint_str_mv | American Geophysical Union (AGU), 2019 |
| institution | DE-14, DE-105, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Zi4, DE-Gla1, DE-15, DE-Pl11, DE-Rs1 |
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| mega_collection | American Geophysical Union (AGU) (CrossRef) |
| physical | 995-1009 |
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| spelling | Tuerena, Robyn E. Williams, Richard G. Mahaffey, Claire Vic, Clément Green, J. A. Mattias Naveira‐Garabato, Alberto Forryan, Alexander Sharples, Jonathan 0886-6236 1944-9224 American Geophysical Union (AGU) Atmospheric Science General Environmental Science Environmental Chemistry Global and Planetary Change http://dx.doi.org/10.1029/2019gb006214 <jats:title>Abstract</jats:title><jats:p>Diapycnal mixing of nutrients from the thermocline to the surface sunlit ocean is thought to be relatively weak in the world's subtropical gyres as energy inputs from winds are generally low. The interaction of internal tides with rough topography enhances diapycnal mixing, yet the role of tidally induced diapycnal mixing in sustaining nutrient supply to the surface subtropical ocean remains relatively unexplored. During a field campaign in the North Atlantic subtropical gyre, we tested whether tidal interactions with topography enhance diapycnal nitrate fluxes in the upper ocean. We measured an order of magnitude increase in diapycnal nitrate fluxes to the deep chlorophyll maximum (DCM) over the Mid‐Atlantic Ridge compared to the adjacent deep ocean. Internal tides drive this enhancement, with diapycnal nitrate supply to the DCM increasing by a factor of 8 between neap and spring tides. Using a global tidal dissipation database, we find that this spring‐neap enhancement in diapycnal nitrate fluxes is widespread over ridges and seamounts. Mid‐ocean ridges therefore play an important role in sustaining the nutrient supply to the DCM, and these findings may have important implications in a warming global ocean.</jats:p> Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges Global Biogeochemical Cycles |
| spellingShingle | Tuerena, Robyn E., Williams, Richard G., Mahaffey, Claire, Vic, Clément, Green, J. A. Mattias, Naveira‐Garabato, Alberto, Forryan, Alexander, Sharples, Jonathan, Global Biogeochemical Cycles, Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges, Atmospheric Science, General Environmental Science, Environmental Chemistry, Global and Planetary Change |
| title | Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_full | Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_fullStr | Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_full_unstemmed | Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_short | Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| title_sort | internal tides drive nutrient fluxes into the deep chlorophyll maximum over mid‐ocean ridges |
| title_unstemmed | Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid‐ocean Ridges |
| topic | Atmospheric Science, General Environmental Science, Environmental Chemistry, Global and Planetary Change |
| url | http://dx.doi.org/10.1029/2019gb006214 |