A new hammer-driven freeze corer |
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| Authors: | Brenda M Miskimmin P Jefferson Curtis David W Schindler Nestor Lafaut |
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| Institution: | (1) Dept. of Biological Sciences, University of Alberta, T6G 2E9 Edmonton, Alberta, Canada;(2) Present address: Division of Science, Okanagan University College, 3333 College Way, V0V 0V1 Kelowna, British Columbia, Canada |
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| Abstract: | A shortcoming of freeze corers has been the inability to collect long cores in stiff sediments. We describe a hammerdriven freeze corer that collects undisturbed sediment cores up to 1.3 m in length in stiff or soft lake sediments. The corer was tested in prairie, montane and alpine lakes of western Canada. For these stiff sediments, conventional (gravity-only) freeze coring methods collected cores ranging from 25–59 cm compared with 100–124 cm for our hammer-driven device. The maximum length of cores could exceed 1.3 m if a longer core barrel was constructed. |
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| Keywords: | freeze coring system sediments mountain lakes corers paleolimnology |
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