Sub-sampling methods

(Source: Nakagawa et al. (2012))

Various novel methodological techniques have been developed as part of the "Suigetsu Varves 2006" project, which may be applied to other sediment cores.

A Powerpoint schematic of the 'LL-channel' ('double-L', or 'Nakagawa channel') sediment sub-sampling technique (described in Nakagawa (2007) and Nakagawa et al. (2012)) can be viewed at:

• LL-channel sampling (.pps)

and a video of the LL-channel sub-sampling in action can be viewed at:

• LL-channel sampling (video)

A Powerpoint explanation of the need for 'Centi-slicer' sediment sub-sampling (applied for pollen, diatom, and biomarker analysis in the "Suigetsu Varves 2006" project), which is especially necessary for sub-sampling of laminated sediment, can be viewed at:

• Centi-slicer concept (.pps)

and video clips of the Centi-slicer in action can be viewed at:

• Centi-slicer (overview)
• Centi-slicer (how it works)
• Centi-slicer (ratchet)

An even higher resolution sub-sampling method, the 'Milli-slicer', was developed for millimetre sub-sampling. Video clips of the Milli-slicer in action can be viewed at:

• Milli-slicer (overview)
• Milli-slicer (how it works)
• Milli-slicer (setting up)
• Milli-slicer (assembling knife)