https://ckan.integration.publishing.service.gov.uk/dataset/ba53f89c-e1af-43c4-84de-f9c97275dcb9
type: Dataset
description: This data was collected in order to investigate the level of evidence for: A) a relationship between the strength of the geodynamo and Earth surface UV-B irradiance; B) increased surface UV-B irradiance during the Laschamps Event (the last major geomagnetic excursion, ca. 41ka BP). The study considered subfossil Pinus Diploxylon (Pinus D.) pollen grains obtained from the annually laminated Japanese Lake Suigetsu sediment record (Bronk Ramsey et al., 2020; Nakagawa et al., 2003). The primary response variable is the abundance of para-coumaric acid (a UV-B absorbing compound) in the sporopollenin of the subfossil pollen grains. The secondary response variable is the probability of grain malformation. There are three key spreadsheets: 1) GCMS_pCA_day_dependent_calbration_simple.csv - estimated abundances of para-coumaric acid in the subfossil Pinus Diploxylon pollen at different depths/times of the Lake Suigetsu sediment core. 2) Suigetsu_malformations_simple.csv - malformations counts in the Lake Suigetsu subfossil Pinus Dipoxylon pollen 3) gc_cultivar_data_simple.csv - estimated abundance of para-coumaric acid in Pinus pollen in a controlled cultivar experiment (considering response to UV-B flux) Descriptor files (with corresponding names) are also provided. This dataset contains data generated by NERC Grant NE/Y002652/1:Reconstructing UV radiation over the Laschamps Geomagnetic Excursion.
issued: 2025-10-28T22:12:40.257803
modified: 2026-04-02T07:33:27.439137
title: Estimated abundances of para-Coumaric acid (a UV-B absorbing compound) and malformations counts in subfossil Pinus Diploxylon pollen, recorded at different depths of sediment core from Lake Suigetsu, Japan
keyword: NERC_DDC
keyword: Palaeoecology
keyword: Pollen

Citation Information - Digital Object Identifier (DOI)
type: Distribution
description: Heaton, T. J., Seddon, A. W. R., Wilkinson-Rowe, E., Krüger, L. C. (2025). Estimated abundances of para-Coumaric acid (a UV-B absorbing compound) and malformations counts in subfossil Pinus Diploxylon pollen, recorded at different depths of sediment core from Lake Suigetsu, Japan. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/91be6279-9329-42df-8652-7d6f224382f5
issued: 2026-04-02T07:33:27.494104
modified: 2026-04-02T07:33:27.451133
access URL: https://doi.org/10.5285/91be6279-9329-42df-8652-7d6f224382f5

https://ckan.integration.publishing.service.gov.uk/dataset/ba53f89c-e1af-43c4-84de-f9c97275dcb9/resource/cec340c3-b833-4f3c-af36-f75185ac6a82
type: Distribution
description: This data was collected in order to investigate the level of evidence for: A) a relationship between the strength of the geodynamo and Earth surface UV-B irradiance; B) increased surface UV-B irradiance during the Laschamps Event (the last major geomagnetic excursion, ca. 41ka BP).
issued: 2026-04-02T07:33:27.494107
modified: 2026-04-02T07:33:27.451209
title: DATA - Estimated abundances of para-Coumaric acid (a UV-B absorbing compound) and malformations counts in subfossil Pinus Diploxylon pollen, recorded at different depths of sediment core from Lake Suigetsu, Japan
access URL: https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item190325

British Geological Survey (BGS)
type: Organization