Identification

Title

Diatom silica oxygen isotope and n-alkanoic acid hydrogen isotope composition of sediments from Lake Suigetsu, Japan (22,000 to 10,000 cal BP)

Abstract

[This dataset is embargoed until February 1, 2025]. This dataset contains information about the stable oxygen isotope composition (δ18O) of bulk diatom silica, and the compound-specific stable hydrogen isotope composition (δ2H) of n-alkanoic acids with different chain lengths. Samples originated from the Lake Suigetsu sediment cores. Data is provided on an approximately centennial (100-year) resolution from 22,040 cal BP to 9,980 cal BP (n = 120). To accompany this data, the mass-normalised total lipid extract and n-alkanoic acid concentrations of key chain length n-alkanoic acids are provided. This data was collected to infer changes to the East Asian Winter Monsoon and East Asian Summer Monsoon during Glacial Termination I. This work was supported by the National Environmental Isotope Facility (grant number 2308.0920) and the NERC IAPETUS2 Doctoral Training Partnership. Full details about this dataset can be found at https://doi.org/10.5285/aaf7d914-7208-41ea-89a6-128048bd99f2

Resource type

dataset

Resource locator

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/aaf7d914-7208-41ea-89a6-128048bd99f2

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

inlandWaters

environment

Keywords

Keyword set

keyword value

Environmental Monitoring Facilities

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Stable isotopes

Diatom

N-alkanoic acid

Biomarker

Sediment core

East Asian Monsoon

Lake Suigetsu

Geographic location

West bounding longitude

135.804

East bounding longitude

136.002

North bounding latitude

35.648

South bounding latitude

35.513

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2023-06-02

Frequency of update

Quality and validity

Lineage

Materials for this study were taken from the Lake Suigetsu sediment cores and split into two – one half designated for stable oxygen isotope analysis (δ18O) of bulk diatom silica and the other half for compound-specific stable hydrogen isotope analysis (δ2H) of the C16, C18, C28 and C30 n-alkanoic acids. Each set of samples underwent chemical preparation to isolate the components required following standard preparation methodologies. Bulk diatom silica oxygen isotopes were measured using stepwise fluorination followed by GC-IRMS analysis. This data was then corrected for residual contamination using a mass balance approach. Compound-specific n-alkanoic acid hydrogen isotopes were measured using a GC-IRMS connected via a furnace. This data was corrected for methylation using a similar mass balance approach.

Conformity

Conformity report

specification

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

owner

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2023-06-02T16:17:05

Metadata language

eng