20251120 16594600 1.0 TRUE Total_Chlorins_Chlorin_Index This data layer comprises total chlorin concentrations and chlorin indices from seabed sediments (0-2 cm). Bottom sediments were collected using either a Smith McIntyre grab or a Box core. Chlorins were extracted from freeze-dried sediment using the method of Schubert et al. (2005). Relative standard deviations of the precisions on duplicate samples averaged 5.6% for total chlorins and 1.7% for chlorin indices (the data for each sample is provided). Schubert, C.J., Niggemann, J., Klockgether, G., and Ferdelman, G., 2005. Chlorin Index: A new parameter for organic matter freshness in sediment. Geochemistry Geophysics and Geosystems 6(3), 1-12. © Commonwealth of Australia (Geoscience Australia) 2016. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode