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Diver-operated piston corer for nearshore use |
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| Authors: | Francis J Sansone James T Hollibaugh Sue M Vink Randoph M Chambers Samantha B Joye Brian N Popp |
| Institution: | 1. Department of Oceanography School of Ocean and Earth Sciences and Technology, University of Hawaii, 1000 Pope Road, 96822, Honolulu, Hawaii 2. Tiburon Center, San Francisco State University, P.O. Box 855, 94920, Tiburon, California 3. Department of Geology and Geophysics School of Ocean and Earth Sciences and Technology, University of Hawaii, 2525 Correa Road, 96822, Honolulu, Hawaii |
| Abstract: | A diver-operated piston corer suitable for collecting cores of >3 m length from fine-grained nearshore sediment has been developed. The corer uses a platform that rests on the sediment surface supporting both the operators and a derrick that maintains the piston at the sediment-water interface. The core is insected into and recovered from the sediment manually. The technique offers several advantages; low cost, minimal disruption of the sediment-water interface, little compaction of the sediment, the ability to collect longer length cores than is possible with gravity corers, and the ability to be deployed from relatively small boats. Dissolved ammonium and inorganic carbon data are presented from a 3.3-m core collected by this technique from Tomales Bay, California. |
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