Mesoscale and finescale mapping of physical and biological fields in the northern California Current system: multi-frequency bioacoustic backscatter data

part of the GLOBEC Northeast Pacific program

Principal investigators: T. J. Cowles, J. A. Barth, and S. D. Pierce

Processing by: S. D. Pierce

College of Oceanic and Atmospheric Sciences at Oregon State University


Vertical sections of (top to bottom) bioacoustic backscatter at 420, 200, 120, and 38 kHz (dB), abundance derived using a linear programming inverse method for 3-4, 5-10, and 11-24 mm size classes (#/m3), chlorophyll (mg/m3), and north-south velocity (cm/s). White curves on all sections are the 25 and 26 sigma-theta contours. [ For details, see: Pierce, S. D., J. A. Barth, W. T. Peterson, and T. J. Cowles (2005) Mesoscale zooplankton surveys in the Northern California Current System, Deep-Sea Research, submitted] :
W0005 Inshore Survey W0008 Inshore Survey
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Bioacoustic backscatter maps (0-100 m) from R/V Wecoma cruises
W0005 (May 29 - Jun 17, 2000) and W0008 (Jul 29 - Aug 17, 2000):
38 kHz 120 kHz 200 kHz 420 kHz


Survey I (May-June 2000) bioacoustics data files Survey II (July-August 2000) bioacoustics data files
Survey III (June 2002) bioacoustics data files Survey IV (August 2002) bioacoustics data files


Funding for this research supported by the National Science Foundation through Grant OCE-0001035.