41ab6de4-4837-3b05-e063-3050940a50b1 English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-03-19 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608553 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 2025-10-15 creation http://data.bgs.ac.uk/id/dataHolding/13608553 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. Timothy Heaton University of Leeds not available originator A W R Seddon University of Bergen not available originator E Wilkinson-Rowe University of Oxford not available originator Linn Cecilie Krüger University of Bergen not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/41ab6de4-4837-3b05-e063-3050940a50b1.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Pollen Palaeoecology BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data data.gov.uk (non-INSPIRE) Citable Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. 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Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation JAPAN [id=540000] ISO 3166_1 alpha-2 2009 revision JP ISO 3166_1 alpha-3 2009 revision JPN 2024-01-01 2025-08-01 Microsoft Excel witheld Enquiries British Geological Survey United Kingdom not available distributor https://doi.org/10.5285/91be6279-9329-42df-8652-7d6f224382f5 WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) 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 information https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item190325 WWW:DOWNLOAD-1.0-http--download 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 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). download nonGeographicDataset non geographic dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false The abundances of para-coumaric acid in the pollen were obtained using GC-MS (in Bergen). The counts of grain malformations were performed by isolation of a sample of Pinus D grains from the sediment core and then counting via a microscope.