Blue-Whale Calls Detected at the Pioneer Seamount Underwater Observatory

Details Blue-Whale Calls Detected at the Pioneer Seamount Underwater Observatory Blue-Whale Calls Detected at the Pioneer Seamount Underwater Observatory

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmos72b0356h&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #OS72B-0356

Computer Science

Sound

0400 Biogeosciences, 0644 Numerical Methods, 1635 Oceans (4203), 4259 Ocean Acoustics, 4830 Higher Marine Organisms

Scientific paper

In September of 2001 a cabled vertical linear array (VLA) of hydrophones was deployed on Pioneer Seamount, 90 km off the California coast near Half Moon Bay, by the NOAA-PMEL and University of Washington-APL. The array of 4 hydrophones is at a depth of 950 m, and the four signals are digitized at the shore end of the cable at 1000 Hz. The data are archived by PMEL, and are available to the public over the internet. Spectrograms of all of the data are accessible on the SFSU web site. A large number of blue-whale calls are evident in the spectrograms. We have employed spectrogram correlation [Mellinger 2000] and a matched-filter detection scheme [Stafford 1998] to automatically identify these whale calls in three months of data. Results on the frequency of calls and their variability will be presented. Mellinger, David K., and Christopher W. Clark [2000], "Recognizing transient low-frequency whale sounds by spectrogram correlation," J. Acoust. Soc. Am. 107 (3518). Stafford, Kathleen M., Christopher G. Fox, and Davis S. Clark [1998], "Long-range acoustic detection and localization of blue whale calls in the northeast Pacific Ocean," J. Acoust. Soc. Am. 104 (3616).

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