Automated Tools for Layer Recognition (BMPix) and Counting (PEAK) ...

• Main Authors: Weber, Michael E, Reichelt, Lucia, Kuhn, Gerhard, Pfeiffer, Miriam, Korff, Björn, Thurow, Juergen W, Ricken, Werner
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; The Antarctic; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.729700; https://doi.pangaea.de/10.1594/PANGAEA.729700

We present tools for rapid and quantitative detection of sediment lamination. The BMPix tool extracts color and gray-scale curves from images at pixel resolution. The PEAK tool uses the gray-scale curve and performs, for the first time, fully automated counting of laminae based on three methods. The maximum count algorithm counts every bright peak of a couplet of two laminae (annual resolution) in a smoothed curve. The zero-crossing algorithm counts every positive and negative halfway-passage of the curve through a wide moving average, separating the record into bright and dark intervals (seasonal resolution). The same is true for the frequency truncation method, which uses Fourier transformation to decompose the curve into its frequency components before counting positive and negative passages.We applied the new methods successfully to tree rings, to well-dated and already manually counted marine varves from Saanich Inlet, and to marine laminae from the Antarctic continental margin. In combination with ... : This is version 1 of the software as published in 2010. It contains 3 macro files (excel) and a read-me file (pdf) in a zip-archive. To download the updated version 2 of the software as of February 2012, see "Other version". ...