The asymmetric distribution of chlorophyll associated with a coastal upwelling center

Burton H. Jones, Larry P. Atkinson, Dolors Blasco, Kenneth H. Brink, Sharon L Smith

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A well-developed upwelling plume was observed off the California coast near Point Conception and Point Arguello (∼34°20′N latitude, 120°35′W longitude) during April 1983. The core of the upwelling plume was cool, nutrient-rich, and low in phytoplankton biomass. The distributions of temperature and nutrients were relatively symmetric about the offshore axis of the cool core of the upwelling center. However, the distribution of chlorophyll was asymmetric about the center with the highest abundance observed on the southern (equatorward) edge of the feature. Comparison of the near-surface currents measured by Doppler acoustic profiling, with the distribution of temperature, nutrients, and chlorophyll, suggests that the phytoplankton asymmetry is determined by the horizontal velocity field. High offshore velocities on the poleward side of the center advect the upwelled water offshore before accumulation of biomass can occur. Lower velocities, more variable current direction, and possible shoreward flow on the equatorward side of the upwelling center permit a longer residence time for the upwelled water near the upwelling center allowing accumulation of phytoplankton biomass to occur.

Original languageEnglish
Pages (from-to)1155-1170
Number of pages16
JournalContinental Shelf Research
Volume8
Issue number10
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

Fingerprint

upwelling
chlorophyll
phytoplankton
nutrients
biomass
longitude
nutrient
plume
acoustics
biomass production
temperature
current direction
water
coasts
residence time
asymmetry
distribution
coast

ASJC Scopus subject areas

  • Aquatic Science
  • Geology
  • Oceanography

Cite this

The asymmetric distribution of chlorophyll associated with a coastal upwelling center. / Jones, Burton H.; Atkinson, Larry P.; Blasco, Dolors; Brink, Kenneth H.; Smith, Sharon L.

In: Continental Shelf Research, Vol. 8, No. 10, 01.01.1988, p. 1155-1170.

Research output: Contribution to journalArticle

Jones, Burton H. ; Atkinson, Larry P. ; Blasco, Dolors ; Brink, Kenneth H. ; Smith, Sharon L. / The asymmetric distribution of chlorophyll associated with a coastal upwelling center. In: Continental Shelf Research. 1988 ; Vol. 8, No. 10. pp. 1155-1170.
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