• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Physical Oceanography (PO)
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Physical Oceanography (PO)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Sea surface pCO2 and O2 dynamics in the partially ice-covered Arctic Ocean

    Thumbnail
    View/Open
    Islam_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf (6.375Mb)
    Date
    2017-02-25
    Author
    Islam, Fakhrul  Concept link
    DeGrandpre, Michael D.  Concept link
    Beatty, Cory  Concept link
    Timmermans, Mary-Louise  Concept link
    Krishfield, Richard A.  Concept link
    Toole, John M.  Concept link
    Laney, Samuel R.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/8943
    As published
    https://doi.org/10.1002/2016JC012162
    DOI
    10.1002/2016JC012162
    Keyword
     Arctic Ocean; CO2; O2; Biogeochemistry; Dynamics; Carbon cycle 
    Abstract
    Understanding the physical and biogeochemical processes that control CO2 and dissolved oxygen (DO) dynamics in the Arctic Ocean (AO) is crucial for predicting future air-sea CO2 fluxes and ocean acidification. Past studies have primarily been conducted on the AO continental shelves during low-ice periods and we lack information on gas dynamics in the deep AO basins where ice typically inhibits contact with the atmosphere. To study these gas dynamics, in situ time-series data have been collected in the Canada Basin during late summer to autumn of 2012. Partial pressure of CO2 (pCO2), DO concentration, temperature, salinity, and chlorophyll-a fluorescence (Chl-a) were measured in the upper ocean in a range of sea ice states by two drifting instrument systems. Although the two systems were on average only 222 km apart, they experienced considerably different ice cover and external forcings during the 40–50 day periods when data were collected. The pCO2 levels at both locations were well below atmospheric saturation whereas DO was almost always slightly supersaturated. Modeling results suggest that air-sea gas exchange, net community production (NCP), and horizontal gradients were the main sources of pCO2 and DO variability in the sparsely ice-covered AO. In areas more densely covered by sea ice, horizontal gradients were the dominant source of variability, with no significant NCP in the surface mixed layer. If the AO reaches equilibrium with atmospheric CO2 as ice cover continues to decrease, aragonite saturation will drop from a present mean of 1.00 ± 0.02 to 0.86 ± 0.01.
    Description
    Author Posting. © American Geophysical Union, 2017. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 122 (2017): 1425–1438, doi:10.1002/2016JC012162.
    Collections
    • Biology
    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Geophysical Research: Oceans 122 (2017): 1425–1438
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Carbon dynamics in the western Arctic Ocean : insights from full-depth carbon isotope profiles of DIC, DOC, and POC 

      Griffith, David R.; McNichol, Ann P.; Xu, Li; McLaughlin, Fiona A.; Macdonald, Robie W.; Brown, Kristina A.; Eglinton, Timothy I. (Copernicus Publications on behalf of the European Geosciences Union, 2012-03-28)
      Arctic warming is projected to continue throughout the coming century. Yet, our currently limited understanding of the Arctic Ocean carbon cycle hinders our ability to predict how changing conditions will affect local ...
    • Thumbnail

      Dynamics in the deep Canada Basin, Arctic Ocean, inferred by thermistor chain time series 

      Timmermans, Mary-Louise; Melling, Humfrey; Rainville, Luc (American Meteorological Society, 2007-04)
      A 50-day time series of high-resolution temperature in the deepest layers of the Canada Basin in the Arctic Ocean indicates that the deep Canada Basin is a dynamically active environment, not the quiet, stable basin often ...
    • Thumbnail

      Dynamics and thermodynamics of the mean transpolar drift and ice thickness in the Arctic Ocean 

      Spall, Michael A. (American Meteorological Society, 2019-11-15)
      A theory for the mean ice thickness and the Transpolar Drift in the Arctic Ocean is developed. Asymptotic expansions of the ice momentum and thickness equations are used to derive analytic expressions for the leading-order ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo