IP25 in marine sediments, supplementary material ...

• Main Authors: Belt, Simon T, Brown, Thomas A, Ampel, Linda, Cabedo-Sanz, Patricia, Fahl, Kirsten, Kocis, James J, Massé, Guillaume, Navarro-Rodriguez, Alba, Ruan, Jiaping, Xu, Yunping
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2014
• Subjects: Antarctic; Arctic; Guillaume; Navarro; Rodriguez; Ruan; Antarc*; Iceland; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.823363; https://doi.pangaea.de/10.1594/PANGAEA.823363

We describe the results of an inter-laboratory investigation into the identification and quantification of the Arctic sea ice biomarker proxy IP25 in marine sediments. 7 laboratories took part in the study, which consisted of the analysis of IP25 in a series of sediment samples from different regions of the Arctic, sub-Arctic and Antarctic, additional sediment extracts and purified standards. The results obtained allowed 4 key outcomes to be determined. First, IP25 was identified by all laboratories in sediments from the Canadian Arctic with inter-laboratory variation in IP25 concentration being substantially larger than within individual laboratories. This greater variation between laboratories was attributed to the difficulty in accurately determining instrumental response factors for IP25, despite provision of appropriate standards. Second, the identification of IP25 by 3 laboratories in sediment from SW Iceland that was believed to represent a blank, was interpreted as representing a better limit of ... : Supplement to: Belt, Simon T; Brown, Thomas A; Ampel, Linda; Cabedo-Sanz, Patricia; Fahl, Kirsten; Kocis, James J; Massé, Guillaume; Navarro-Rodriguez, Alba; Ruan, Jiaping; Xu, Yunping (2014): An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations. Climate of the Past, 10(1), 155-166 ...