Date (Creation)

2017-12-07

Date (Revision)

2017-12-07

Date (Publication)

2017-12-07

Date (released)

2017-12-07

Edition

1

Unique resource identifier

https://doi.org/10.5285/9caf74c4-7054-4539-81b8-d4f942afc358

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01048

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/L002434/1

Codespace

award

Other citation details

Please cite this item as: doi:10.5285/9caf74c4-7054-4539-81b8-d4f942afc358 \ short-doi:10/ch73

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Cardiff University	Detlef, Henrieka		Author
Plymouth University	Belt, Simon		Author
Cardiff University	Sosdian, Sindia		Author
Plymouth University	Smik, Lukas		Author
Cardiff University	Lear, Caroline		Author
Cardiff University	Hall, Ian		Author
Plymouth University	Cabedo-Sanz, Patricia		Author
Norwegian Polar Institute	Husum, Katrine		Author
University of Exeter	Kender, Sev		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Cryosphere > Sea Ice > Ice Extent
• EARTH SCIENCE > Oceans > Marine Sediments > Sediment Chemistry
• EARTH SCIENCE > Oceans > Ocean Chemistry > Marine Geochemistry
• EARTH SCIENCE > Paleoclimate > Paleoclimate Reconstructions

Theme

• Bering Sea

• Biomarker

• IP25

• Mid-Pleistocene transition

• Sea ice

Place

• Bering Sea Arctic

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features
• Geology

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC data policy and supplied under Open Government Licence v.3

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere
• Geoscientific information

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

The data was generated using samples from International Ocean Discovery Program Site U1343 (Leg 323) in the eastern Bering Sea. The samples were freeze dried at -45°C and 0.2 mbar for 48 hours using a Thermo Savant Modulyo D freeze drier and an Edwards K4 Modulyo freeze drier at Plymouth and Cardiff University, respectively. The highly branched isoprenoid (HBI) lipids were extracted from 3g freeze dried sediment as described in Belt et al. (2012). Additionally sulphur removal using tetrabutylammonium sulphite reagent (TBA) (Cabedo-Sanz and Belt 2015) was performed for all samples prior to silica column chromatographic purification of the total organic extracts. The samples were measured on the gas chromatography mass spectrometer (Agilent 7890A GC coupled to a 5975 series mass selective detector fitted with an Agilent HP-5ms column) at Plymouth University using the operating conditions specified in Belt et al. 2012. The identification of individual lipids was based on their characteristic retention time and mass spectra and quantification was achieved by integrating the peak area of selected ions (m/z 350 (IP25); 346 (HBI III); 470 (brassicasterol)) in comparison to the peak area of the internal standards added to each sample (Belt et al. 2012). Quantification of individual lipids also considers an instrumental response factor obtained from known concentrations of biomarker lipids in the standard sediments (Belt et al. 2012). The data is provided in ng g-1 dry sediment (sed).

Data quality:

A procedural blank was added to each extraction batch to screen for contamination. The 4-year instrumental uncertainty is < 10%.

The average sample resolution for all three time intervals is 5 ka, however, the sample resolution is highly variable.

Metadata

File identifier

9caf74c4-7054-4539-81b8-d4f942afc358 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2017-12-07

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact