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). 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.

Date (Creation): 2025-10-15

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13608553

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Leeds	Timothy Heaton	not available	Originator
University of Bergen	A W R Seddon	not available	Originator
University of Oxford	E Wilkinson-Rowe	not available	Originator
University of Bergen	Linn Cecilie Krüger	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency: notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

NGDC Deposited Data
Pollen
Citable Data
data.gov.uk (non-INSPIRE)
Palaeoecology

dataCentre

Keywords

NERC_DDC

Access constraints: Other restrictions

Other constraints: restricted

Other constraints: The dataset has been formally approved by BGS for access by external clients under a BGS Digital Data Licence, issued via BGS's IPR Section. The dataset must not be provided to, or be accessible by, an external client until the IPR Section confirms that signed licence documentation is in place. Refer to the IPR Section (DigitalLE@bgs.ac.) if further advice is required.. Constraint applies until 2025-11-30

Use constraints: Other restrictions

Other constraints: The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Language: English

Topic category

Geoscientific information

Geographic identifier: JAPAN [id=540000]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier: JP
ISO 3166_1 alpha-2 2009 revision

Geographic identifier: JPN
ISO 3166_1 alpha-3 2009 revision

Begin date: 2024-01-01

End date: 2025-08-01

Reference System Information

No information provided.

Distribution format

Name	Version
MS Excel

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--related	https://doi.org/10.5285/91be6279-9329-42df-8652-7d6f224382f5	DOI - 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

OnLine resource

Protocol	Linkage	Name
WWW:DOWNLOAD-1.0-http--download	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item190325	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

Hierarchy level: Non geographic dataset

Other: non geographic dataset

Conformance result

Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Title: 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

Date (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: 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.