PANGAEA_965927 Elemental pigment (hyperspectral imaging) data of the varved sediment record (HZM19) from Holzmaar, Germany Birlo, Stella; Wienhues, Giulia; Zahajská, Petra; Grosjean, Martin; García, María Luján; Zolitschka, Bernd Elemental pigment (hyperspectral imaging) data of the varved sediment record (HZM19) from Holzmaar, Germany 2024-11-14 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.965927 Investigator Stella Birlo sbirlo@uni-bremen.de Earth Science Core section label Section position Depth, composite Calendar age, mean Calendar age, minimum/young Calendar age, maximum/old Relative absorption band depth, 620 nm Relative absorption band depth, 671 nm Relative absorption band depth, 845 nm Chloropigments, per unit sediment mass Bacteriopheopigments, per unit sediment mass geoscientificInformation Eifel Holzmaar HSI HZM19 Pigments Piston corer, UWITEC XRF Calculated, based on VT22 (Birlo et al., 2023) Measured HSI index, calibrated 2019-08-11 2019-08-17 Complete 50.11667 50.11667 6.883333 6.883333 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 1415832 data points text/tab-separated-values García, María Luján; Birlo, Stella; Zahajská, Petra; Wienhues, Giulia; Grosjean, Martin; Zolitschka, Bernd (2024): Ecological responses to solar forcing during the Homerian Climate Anomaly recorded by varved sediments from Holzmaar, Germany. The Holocene, 09596836241275008, https://doi.org/10.1177/09596836241275008

Hyperspectral image (HSI) scanning of the composite record from Holzmaar (HZM19) was measured using a Specim PFD-CL-65-V10 E line scan camera (University of Bern, Switzerland). Data were processed using the ENVI software following the workflow of Butz et al. (2015, doi10.1117/1.JRS.9.096031): data were white-corrected, masked for cracks in the sediment surface and Relative Absorption Band Depths (RABDs) were computed for 2mm wide subsets. RABD671 (band depths from 640 to 702 nm) for Total Chloropigments-a (TChl-a), RABD845 (790 - 900 nm) for Bacteriopheopigments-a (Bphe-a), and RABD620 (600 - 640 nm) for Phycocyanin (PhyCy). To translate HSI indices into absolute concentrations, a pigment extraction was performed at the University of Bern using 23 samples covering the full range of RABD671 and RABD845 index values. Ca 1 g of wet sediment was treated with 100 % acetone following the method of Lami et al. (1994, doi:10.1007/BF00684032) and extractions were measured using a Shimadzu UV-1800 spectrophotometer to obtain bulk concentrations of TChl-a and Bphe-a in µg/g dry sediment using a molar extinction coefficient for TChl-a and Bphe-a. A proxy-proxy calibration was carried out using an ordinary least square regression. After all, only 1.42 % and 0.77 % of datapoints are outside of the calibration ranges for Chl-a (calibration range: 12.75 – 1202.68 µg/g, intercept = -4799.52, slope= 4756,45, r² = 0.8, p-val = 0.00, RMSEP 10-fold = 169.03, RMSEP % = 14.05) and Bphe-a (calibration range 0.38 – 345.12 µg/g, intercept = -1295,8, slope= 1319,7, r² = 0.94, p-val = 0.00, RMSEP 10-fold = 25.26, RMSEP % = 7.32). Ages refer to Birlo et al. (2023) and the related dataset is Model D available via doi:10.1594/PANGAEA.949292. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.965927"!

https://doi.org/10.1177/09596836241275008 Ecological responses to solar forcing during the Homerian Climate Anomaly recorded by varved sediments from Holzmaar, Germany https://doi.org/10.5194/gchron-5-65-2023 Calculated, based on VT22 (Birlo et al., 2023) DIF 9.4 2024-11-14 2026-05-07