Safaierad, Reza; Schefuß, Enno; Zolitschka, Bernd; Vogt, Christoph; Hahn, Annette; Yokoyama, Yusuke; Mohtadi, Mahyar: Biogenic silica, total organic (TOC) and inorganic carbon (TIC) data of core Sardarya from southeast Iran [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965838 (dataset in review)
Abstract:
The proxy data reported here are measured from a sediment core collected from Lake Sardarya (28° 38' 03" N, 61° 00' 44" E, 2675 m a.s.l.) situated on the western slope of Taftan volcano, southeastern Iran. The core is 550 cm long and was collected in May 2017. To determine total organic (TOC) and inorganic carbon (TIC) contents, we used Fourier-transform infrared spectroscopy (FTIRS) analyses of the samples in a diffuse reflectance mode with a VERTEX 70 FTIRS spectrometer (BrukerOptik GmbH, Germany) equipped with a diffuse reflectance accessory (Praying Mantis Harrick Inc., USA). Sample pretreatment, IR spectroscopy measurement conditions and processing procedures applied to the raw spectra are described by Vogel et al. (2016). The pretreatment for all samples consisted of drying and grinding 50 mg smaller than 63 mm. Additionally, the Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analysis was used to estimate biogenic silica (BSi) content. For DRIFTS analyses, 11 (±0.1) mg of the sample was mixed with 500 (±0.5) mg of potassium bromide (KBr). Finally, the BSi content was determined using the calibration model by Meyer-Jacob et al. (2014), which is based on synthetic sediment mixtures with defined BSi concentrations.
Supplement to:
Safaierad, Reza; Schefuß, Enno; Zolitschka, Bernd; Noorollahi, Dariush; Yokoyama, Yusuke; Vogt, Christoph; Hahn, Annette; Mohtadi, Mahyar (in review): Anthropogenic warming is a greater threat to West Asian water resources than the naturally induced Little Ice Age cooling. Science Advances
References:
Meyer-Jacob, Carsten; Vogel, Hendrik; Boxberg, Florian; Rosén, Peter; Weber, Michael E; Bindler, Richard (2014): Independent measurement of biogenic silica in sediments by FTIR spectroscopy and PLS regression. Journal of Paleolimnology, 52(3), 245-255, https://doi.org/10.1007/s10933-014-9791-5
Vogel, Hendrik; Meyer-Jacob, Carsten; Thöle, Lena; Lippold, Jörg; Jaccard, Samuel L (2016): Quantification of biogenic silica by means of Fourier transform infrared spectroscopy (FTIRS) in marine sediments. Limnology and Oceanography-Methods, https://doi.org/10.1002/lom3.10129
Related code / software:
Blaauw, Maarten; Christen, Andrés; Aquino-Lopez, Marco A; Esquivel-Vazquez, Judith; Gonzalez V, Oscar M; Belding, Ted; Theiler, James; Gough, Brian; Karney, Charles (2021): Package rbacon. CRAN, https://CRAN.R-project.org/package=rbacon (Using command BC/AD = TRUE)
Coverage:
Latitude: 28.634167 * Longitude: 61.012222
Minimum DEPTH, sediment/rock: 0.390 m * Maximum DEPTH, sediment/rock: 5.400 m
Event(s):
Comment:
Biogenic silica, total organic (TOC) and inorganic carbon (TIC): 77 samples, analysed at Dept. of Geosciences, University of Bremen (17.08.2017)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Safaierad, Reza | Geocode | |
| 2 | AGE | Age | ka BP | Safaierad, Reza | Age, calculated from a AD | Geocode |
| 3 | Age | Age | a AD/CE | Safaierad, Reza | Age model, Bacon (Blaauw & Christen, 2011) | |
| 4 | Biogenic silica | bSiO2 | % | Safaierad, Reza | Fourier-transform infrared (FTIR) spectrometer, Bruker, VERTEX 70; coupled with Diffuse reflection accessory, Harrick, Praying Mantis | |
| 5 | Carbon, organic, total | TOC | % | Safaierad, Reza | Fourier-transform infrared (FTIR) spectrometer, Bruker, VERTEX 70; coupled with Diffuse reflection accessory, Harrick, Praying Mantis | |
| 6 | Carbon, inorganic, total | TIC | % | Safaierad, Reza | Fourier-transform infrared (FTIR) spectrometer, Bruker, VERTEX 70; coupled with Diffuse reflection accessory, Harrick, Praying Mantis |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
308 data points