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SHELF SOURCES OF IRON IN THE SOUTHERN CALIFORNIA CURRENT SYSTEM

Iron (Fe) is an important micronutrient for biological processes, and Fe availability has been identified as a limiting factor for biological productivity in a number of ocean regions. In the eastern boundary upwelling regime of coastal California, Fe supply from the shelf via resuspension of the benthic boundary layer (BBL) during coastal upwelling has been shown to be a significant influence on the development of diatom blooms. While the regional variability of the shelf as an Fe source in central and northern California has been relatively well-studied, little is known about shelf sources of Fe in the southern California Current region. In this study we document variation in the extent of the BBL on the shelf north of and adjacent to Point Conception, the major upwelling center in the southern California Current region. We also exploit the long-standing California Cooperative Oceanic Fisheries Investigations time series, as well as satellite imagery, in order to gain unique insight into seasonal and interannual variations in BBL extent driven by highly episodic river and stream inputs. These studies point out the important linkages that exist between the marine upwelling ecosystems of the southern California Current and the mountainous coastal drainage basins around Point Conception.

Authors

Barbeau, K. A., University of California San Diego, Scripps Institution of Oceanography, USA, kbarbeau@ucsd.edu

Ruacho, A., University of California San Diego, Scripps Institution of Oceanography, USA, aruacho@ucsd.edu

Kahru, M., University of California San Diego, Scripps Institution of Oceanography, USA, mkahru@ucsd.edu

Details

Poster presentation

Session #:049
Date: 03/03/2017
Time: 11:00 - 12:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 405