Description: To calibrate the hyperspectral imaging (HSI) index values from the sediments of Holzmaar (HZM19) to concentration, a spectrophotometrically measured pigment analysis (Butz et al., 2015; doi:10.1117/1.JRS.9.096031) was performed for 23 samples. These samples were selected to cover a wide range of pigment concentrations as documented by HSI scanning. Approximately 1 g of wet sediment was treated with 100 % acetone according to the method of Lami et al. (1994; doi:10.1007/BF00684032), and the extracts were measured with a Shimadzu UV-1800 spectrophotometer to obtain the mass concentration of Chl-a and Bphe-a in µg/g dry sediment using a mass extinction coefficient for Chl-a (Fiedor et al, 2002; doi:10.1562/0031-8655(2002)0760145POTBCS2.0.CO2) and for Bphe-a (Jeffrey and Humphrey, 1975; doi:10.1016/S0015-3796(17)30778-3).
Global identifier:
Doi(
"10.1594/PANGAEA.967140",
)
Measurements(
Measurements {
domain: Unspecified,
station: None,
measured_variables: [
"Core section label",
"Section",
"Section position",
"Depth, composite",
"Calendar age, mean",
"Absorbance, 664 nm",
"Chloropigments, per unit sediment mass",
"Relative absorption band depth, 671 nm",
"Absorbance, 750 nm",
"Bacteriopheopigments, per unit sediment mass",
"Relative absorption band depth, 845 nm",
],
methods: [
"Calculated, based on VT22 (Birlo et al., 2023)",
"Spectrophotometer Shimadzu UV-1800",
"According to Fiedor et al. (2002)",
"According to Butz et al. (2015)",
"Spectrophotometer Shimadzu UV-1800",
"HSI index, calibrated",
"According to Butz et al. (2015)",
],
},
)
Dataset
Origins: /Wissenschaft/PANGAEA
Tags: Kalibrierung ? Pigment ? Eifel ? Daten ? Sediment ? Hyperspektrale Fernerkundung ? HSI ? Holzmaar ? XRF ?
Region: Holzmaar
Bounding boxes: 6.883333° .. 6.883333° x 50.11667° .. 50.11667° 6.87847° .. 6.87847° x 50.11924° .. 50.11924°
License: cc-by/4.0
Language: Englisch/English
Issued: 2024-11-14
Modified: 2024-11-14
Time ranges: 2019-08-11 - 2019-08-17
Accessed 1 times.