Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Warmer, deeper and greener mixed layers in the north Atlantic subpolar gyre over the last 50 years.

    235394_235394.pdf (615.7Kb)
    Access Status
    Open access
    Authors
    Martinez, E.
    Raitsos, D.
    Antoine, David
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Martinez, E. and Raitsos, D. and Antoine, D. 2015. Warmer, deeper and greener mixed layers in the north Atlantic subpolar gyre over the last 50 years. Global Change Biology. 22 (2): pp. 604-612.
    Source Title
    Glob Chang Biol
    DOI
    10.1111/gcb.13100
    School
    Department of Physics and Astronomy
    Remarks

    This is the peer reviewed version of the following article: Martinez, E. and Raitsos, D. and Antoine, D. 2015. Warmer, deeper and greener mixed layers in the north Atlantic subpolar gyre over the last 50 years. Global Change Biology. 22 (2): pp. 604-612., which has been published in final form at http://doi.org/10.1111/gcb.13100 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving at http://olabout.wiley.com/WileyCDA/Section/id-820227.html#terms

    URI
    http://hdl.handle.net/20.500.11937/24692
    Collection
    • Curtin Research Publications
    Abstract

    Shifts in global climate resonate in plankton dynamics, biogeochemical cycles, and marine food webs. We studied these linkages in the North Atlantic Subpolar Gyre (NASG), which hosts extensive phytoplankton blooms. We show that phytoplankton abundance increased since the 1960s in parallel to a deepening of the mixed layer and a strengthening of winds and heat losses from the ocean, as driven by the low frequency of the North Atlantic Oscillation (NAO). In parallel to these bottom-up processes, the top-down control of phytoplankton by copepods decreased over the same time period in the western NASG, following sea surface temperature changes typical of the Atlantic Multi-decadal Oscillation (AMO). While previous studies have hypothesized that climate-driven warming would facilitate seasonal stratification of surface waters and long-term phytoplankton increase in subpolar regions, here we show that deeper mixed layers in the NASG can be warmer and host a higher phytoplankton biomass. These results emphasize that different modes of climate variability regulate bottom-up (NAO control) and top-down (AMO control) forcing on phytoplankton at decadal time scales. As a consequence, different relationships between phytoplankton, zooplankton and their physical environment appear, subject to the disparate temporal scale of the observations (seasonal, interannual, or decadal). The prediction of phytoplankton response to climate change should be built upon what is learnt from observations at the longest time scales. This article is protected by copyright. All rights reserved.

    Related items

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

    • Phenological changes of oceanic phytoplankton in the 1980s and 2000s as revealed by remotely sensed ocean-color observations
      D’Ortenzio, F.; Antoine, David; Martinez, E.; Ribera d’Alcalà, M. (2012)
      We investigated the phenology of oceanic phytoplankton at large scales over two 5-year time periods: 1979–1983 and 1998–2002. Two ocean-color satellite data archives (Coastal Zone Color Scanner (CZCS) and Sea-viewing Wide ...
    • Climate-driven basin-scale decadal oscillations of oceanic phytoplankton
      Martinez, E.; Antoine, David; D’Ortenzio, F.; Gentili, B. (2009)
      Phytoplankton—the microalgae that populate the upper lit layers of the ocean—fuel the oceanic food web and affect oceanic and atmospheric carbon dioxide levels through photosynthetic carbon fixation. Here, we show that ...
    • Phytoplankton spring and fall blooms in the North Atlantic in the 1980s and 2000s
      Martinez, E.; Antoine, David; D’Ortenzio, F.; de Boyer Montégut. C. (2011)
      [1] Phytoplankton chlorophyll-a (Chl) seasonal cycles of the North Atlantic are described using satellite ocean color observations covering the 1980s and the 2000s. The study region is where warmer SST and higher Chl in ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.