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Phytoplankton biomass cycles in the north atlantic subpolar gyre: a similar mechanism for two different blooms in the labrador sea

Lacour, Léo et al.

Geophysical research letters. VOL 42; NUMBER 13, ; 2015, 5403-5410 -- Wiley-Blackwell

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  • Title:
    Phytoplankton biomass cycles in the north atlantic subpolar gyre: a similar mechanism for two different blooms in the labrador sea
  • Author: Lacour, Léo;
    Claustre, Hervé;
    Prieur, Louis;
    D'Ortenzio, Fabrizio
  • Found In: Geophysical research letters. VOL 42; NUMBER 13, ; 2015, 5403-5410
  • Journal Title: Geophysical research letters.
  • Subjects: Earth Sciences; Environment; Dewey: 551
  • Publication Details: Wiley-Blackwell
  • Language: English
  • Abstract: An analysis of seasonal variations in climatological surface chlorophyll points to distinct biogeographical zones in the North Atlantic subpolar gyre. In particular, the Labrador Sea appears well delineated into two regions on either side of the 60°N parallel, with very different climatological phytoplankton biomass cycles. Indeed, north of 60°N, an early and short spring bloom occurs in late April, while south of 60°N, the bloom gradually develops 1 month later and significant biomass persists all summer long. Nevertheless, at climatological scale, the firstâ€?order mechanism that controls the bloom is identical for both bioregions. The lightâ€?mixing regime can explain the bloom onset in both bioregions. In the Labrador Sea, the blooms seem to rely on a mean community compensation irradiance threshold value of 2.5 mol photon m−2 d−1 over the mixed layer.
  • Identifier: System Number: ETOCRN388890615; Journal ISSN: 0094-8276
  • Publication Date: 2015
  • Physical Description: Physical
  • Shelfmark(s): 4156.900000
  • UIN: ETOCRN388890615

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