Suspended particle and bacterial maxima in Peruvian coastal waters during a cold water anomaly

Richard W. Spinrad, Hilary Glover, Bettie Ward, Louis A. Codispoti, Gunnar Kullenberg

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Simultaneous optical, biological and chemical analyses of coastal waters off Peru were made during a period characterized by anomalously cold surface waters and weak wind-driven coastal upwelling. Particle size distributions and the microbial and chemical nature of the intermediate nepheloid layers provide strong evidence that bacteriol growth, settling and offshore transport of particles are major processes controlling the particulate structure of the nearshore waters. The data also support previous suggestions that mid-depth maxima in suspended particles associated with nitrite maxima have a large bacterial component. Further, these results demonstrate the effectiveness of in situ optical methods for detection and quantification of the bacterial component of particle size distributions. While some features were similar to the particulate structures observed previously in Peruvian coastal waters, the data show the region to have significant temporal and spatial variability.

Original languageEnglish (US)
Pages (from-to)715-733
Number of pages19
JournalDeep Sea Research Part A, Oceanographic Research Papers
Volume36
Issue number5
DOIs
StatePublished - Jan 1 1989

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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