de.pangaea.dataset965927 und dataset PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact 2026-05-07T15:41:38Z https://doi.pangaea.de/10.1594/PANGAEA.965927 <gco:CharacterString>Elemental pigment (hyperspectral imaging) data of the varved sediment record (HZM19) from Holzmaar, Germany</gco:CharacterString> 2024-11-14T13:16:04 publication https://doi.org/10.1594/PANGAEA.965927 Birlo, Stella
sbirlo@uni-bremen.de
https://orcid.org/0000-0003-0174-4901 information author Wienhues, Giulia
giulia.wienhues@giub.unibe.ch
https://orcid.org/0000-0002-4282-488X information author Zahajská, Petra
petra.zahajska@unibe.ch
https://orcid.org/0000-0001-5858-0616 information author Grosjean, Martin
martin.grosjean@unibe.ch
https://orcid.org/0000-0002-3553-8842 information author García, María Luján
garcia@uni-bremen.de
https://orcid.org/0000-0002-2658-2753 information author Zolitschka, Bernd
zoli@uni-bremen.de
https://orcid.org/0000-0001-8256-0420 information author PANGAEA
info@pangaea.de
https://www.pangaea.de/ information publisher tableDigital 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. completed Birlo, Stella
sbirlo@uni-bremen.de
https://orcid.org/0000-0003-0174-4901 information principalInvestigator Eifel Holzmaar HSI Pigments XRF theme <gco:CharacterString>PANGAEA Keyword List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation 6.883333 6.883333 50.11667 50.11667 2019-08-11T00:00:00 2019-08-17T00:00:00 Core section label thematicClassification Section position physicalMeasurement mm mm Depth, composite physicalMeasurement mcd mcd Calendar age, mean physicalMeasurement Calculated, based on VT22 (Birlo et al., 2023); Model D ka BP ka BP Calendar age, minimum/young physicalMeasurement Calculated, based on VT22 (Birlo et al., 2023); Model D ka BP ka BP Calendar age, maximum/old physicalMeasurement Calculated, based on VT22 (Birlo et al., 2023); Model D ka BP ka BP Relative absorption band depth, 620 nm thematicClassification Measured Relative absorption band depth, 671 nm thematicClassification Measured Relative absorption band depth, 845 nm thematicClassification Measured Chloropigments, per unit sediment mass physicalMeasurement HSI index, calibrated; Total µg/g µg/g Bacteriopheopigments, per unit sediment mass physicalMeasurement µg/g µg/g text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.965927?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: HZM19 * LATITUDE: 50.116670 * LONGITUDE: 6.883333 * DATE/TIME START: 2019-08-11T00:00:00 * DATE/TIME END: 2019-08-17T00:00:00 * ELEVATION: 425.0 m * PENETRATION: 14.50 m * LOCATION: Holzmaar, West-Eifel Volcanic Field, Germany * METHOD/DEVICE: Piston corer, UWITEC 2019-08-11T00:00:00 Supplement to <gco:CharacterString>Ecological responses to solar forcing during the Homerian Climate Anomaly recorded by varved sediments from Holzmaar, Germany</gco:CharacterString> 2024-01-01 publication https://doi.org/10.1177/09596836241275008 García, María Luján
garcia@uni-bremen.de
https://orcid.org/0000-0002-2658-2753 information author Birlo, Stella
sbirlo@uni-bremen.de
https://orcid.org/0000-0003-0174-4901 information author Zahajská, Petra
petra.zahajska@unibe.ch
https://orcid.org/0000-0001-5858-0616 information author Wienhues, Giulia
giulia.wienhues@giub.unibe.ch
https://orcid.org/0000-0002-4282-488X information author Grosjean, Martin
martin.grosjean@unibe.ch
https://orcid.org/0000-0002-3553-8842 information author Zolitschka, Bernd
zoli@uni-bremen.de
https://orcid.org/0000-0001-8256-0420 information author documentDigital The Holocene 09596836241275008