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Title: New nutrients exert fundamental control on dissolved organic carbon accumulation in the surface Atlantic Ocean

Abstract

The inventories of carbon residing in organic matter dissolved in the ocean [dissolved organic carbon (DOC)] and in the atmosphere as CO 2 are of the same order of magnitude, such that small changes in the DOC pool could have important consequences in atmospheric carbon and thus climate. DOC in the global ocean is largely formed in the sunlit euphotic zone, but identifying predictable controls on that production is an important yet unrealized goal. In this paper, we use a testable and causative correlation between the net production of DOC and the consumption of new nutrients in the euphotic zone of the Atlantic Ocean. We demonstrate that new nutrients introduced to the euphotic zone by upwelling in divergence zones and by winter convective overturn of the water column, and the primary production associated with those nutrients, are the ultimate driver of DOC distributions across the Atlantic basins. Finally, as new nutrient input will change with a changing climate, the role of DOC in the ocean’s biological pump should likewise be impacted.

Authors:
 [1];  [2];  [1]
  1. Univ. of Miami, FL (United States). Dept. of Ocean Sciences. Rosenstiel School of Marine and Atmospheric Science
  2. Univ. of California, Irvine, CA (United States). Earth System Science
Publication Date:
Research Org.:
Univ. of California, Irvine, CA (United States); Univ. of Miami, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Science Foundation (NSF)
OSTI Identifier:
1469576
Grant/Contract Number:  
SC0012550; OCE1436748
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 38; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; DOC; new nutrients; net community production; Atlantic; surface ocean

Citation Formats

Romera-Castillo, Cristina, Letscher, Robert T., and Hansell, Dennis A. New nutrients exert fundamental control on dissolved organic carbon accumulation in the surface Atlantic Ocean. United States: N. p., 2016. Web. doi:10.1073/pnas.1605344113.
Romera-Castillo, Cristina, Letscher, Robert T., & Hansell, Dennis A. New nutrients exert fundamental control on dissolved organic carbon accumulation in the surface Atlantic Ocean. United States. doi:10.1073/pnas.1605344113.
Romera-Castillo, Cristina, Letscher, Robert T., and Hansell, Dennis A. Wed . "New nutrients exert fundamental control on dissolved organic carbon accumulation in the surface Atlantic Ocean". United States. doi:10.1073/pnas.1605344113. https://www.osti.gov/servlets/purl/1469576.
@article{osti_1469576,
title = {New nutrients exert fundamental control on dissolved organic carbon accumulation in the surface Atlantic Ocean},
author = {Romera-Castillo, Cristina and Letscher, Robert T. and Hansell, Dennis A.},
abstractNote = {The inventories of carbon residing in organic matter dissolved in the ocean [dissolved organic carbon (DOC)] and in the atmosphere as CO2 are of the same order of magnitude, such that small changes in the DOC pool could have important consequences in atmospheric carbon and thus climate. DOC in the global ocean is largely formed in the sunlit euphotic zone, but identifying predictable controls on that production is an important yet unrealized goal. In this paper, we use a testable and causative correlation between the net production of DOC and the consumption of new nutrients in the euphotic zone of the Atlantic Ocean. We demonstrate that new nutrients introduced to the euphotic zone by upwelling in divergence zones and by winter convective overturn of the water column, and the primary production associated with those nutrients, are the ultimate driver of DOC distributions across the Atlantic basins. Finally, as new nutrient input will change with a changing climate, the role of DOC in the ocean’s biological pump should likewise be impacted.},
doi = {10.1073/pnas.1605344113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 38,
volume = 113,
place = {United States},
year = {2016},
month = {8}
}

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Cited by: 16 works
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Works referenced in this record:

Time series of the Meridional Overturning Circulation intensity at OVIDE
dataset, October 2016

  • Mercier, Herle; Daniault, Nathalie; Lherminier, Pascale
  • SEANOE (Sea scientific open data edition), 1 file (32 KB)
  • DOI: 10.17882/46445

Gridded property and transport data of the biennial Greenland-Portugal A25 OVIDE line
dataset, October 2016

  • Nathalie, Daniault; Herle, Mercier; Pascale, Lherminier
  • Seanoe, 1 GB
  • DOI: 10.17882/46446

The Greenland-Portugal Go-Ship A25 OVIDE CTDO2 hydrographic data
dataset, October 2016

  • Mercier, Herle; Lherminier, Pascale; Pérez, Fiz F.
  • SEANOE (Sea scientific open data edition), 1 file (139 MB)
  • DOI: 10.17882/46448

    Works referencing / citing this record:

    Time series of the Meridional Overturning Circulation intensity at OVIDE
    dataset, October 2016

    • Mercier, Herle; Daniault, Nathalie; Lherminier, Pascale
    • SEANOE (Sea scientific open data edition), 1 file (32 KB)
    • DOI: 10.17882/46445

    Gridded property and transport data of the biennial Greenland-Portugal A25 OVIDE line
    dataset, October 2016

    • Nathalie, Daniault; Herle, Mercier; Pascale, Lherminier
    • Seanoe, 1 GB
    • DOI: 10.17882/46446

    The Greenland-Portugal Go-Ship A25 OVIDE CTDO2 hydrographic data
    dataset, October 2016

    • Mercier, Herle; Lherminier, Pascale; Pérez, Fiz F.
    • SEANOE (Sea scientific open data edition), 1 file (139 MB)
    • DOI: 10.17882/46448