the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
| 03 Apr 2025
Data for Modern Soil Chronometry using Fallout Radionuclides
Abstract. We describe environmental gamma spectrometry data for >700 soil samples collected from >35 high-resolution quantitative soil profiles spanning global sites. The data are collected for the purpose of modern soil chronometry based on fallout radionuclides (FRNs) 7Be and 210Pb, using the Linked Radionuclide Accumulation model (LRC). Cumulative gamma counting time for samples in the database exceeds 6.5 years. This is a living database to be augmented as data become available and corrected with improvements in data reduction or identification of errors. Versions and changes will be indexed. Special attention is paid to measurement uncertainties in the dataset, as well as how atmospheric or excess 210Pb is defined in both geochemical and mathematical terms for use in the LRC model. Basic familiarity with gamma spectrometry and radionuclide decay chains is assumed. The data set can be accessed at https://doi.org.10.17632/cfxkpn6hj9.1 (Landis, 2025).
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RC1: 'Comment on essd-2025-69', Anonymous Referee #1, 02 May 2025
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Overview: This manuscript describes a large (>700 samples), geographically diverse (>35 locations) publicly available dataset of radionuclides measured in soils by gamma detection with the goal of improving studies that use modern chronometry. This work will be of great value to those seeking to set up and/or improve the analytical rigor of their gamma spectrometry facilities. The work is clear and thorough, and I have only minor edits listed below.
Minor [I provide some copy edits because these can sometimes, frustratingly, be missed at the copy edit stage]
Line ~93: accomplishes
Line ~111: photopeak energy in the ??? (described below)
Line 165: important
Line ~178: notable
Line 185: measurable
Line ~247: I believe Pb-214 comes before Bi-214. Do the >> indicate missing steps? Is this a common notation?
Section 4: One reason I was taught for measuring Rn-222 daughters Pb-214 and Bi-214 throughout the Pb-210 depths rather than relying on a measure of Pb-210 beyond a depth at which excess and supported converge, is to account for potential stratigraphic changes in lithology, grainsize, organic matter content, etc. Perhaps this is less of a concern in soils than coastal sediments but perhaps it is worth noting in section 4.
Line 460: end sentence on a period.
Line ~468: unable *to* fill
Citation: https://doi.org/10.5194/essd-2025-69-RC1
Data sets
Data for Modern Soil Chronometry using Fallout Radionuclides Joshua D. Landis https://doi.org/10.17632/cfxkpn6hj9.1
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