We’re sorry, but GBIF doesn’t work properly without JavaScript enabled.
Our website has detected that you are using an outdated insecure browser that will prevent you from using the site. We suggest you upgrade to a modern browser.
{{nav.loginGreeting}}
  • Get data
      • Occurrences
      • GBIF API
      • Species
      • Datasets
      • Occurrence snapshots
      • Hosted portals
      • Trends
  • How-to
    • Share data

      • Quick-start guide
      • Dataset classes
      • Data hosting
      • Standards
      • Become a publisher
      • Data quality
      • Data papers
    • Use data

      • Featured data use
      • Citation guidelines
      • GBIF citations
      • Citation widget
  • Tools
    • Publishing

      • IPT
      • Data validator
      • Scientific Collections
      • Suggest a dataset
      • New data model ⭐️
    • Data access and use

      • Hosted portals
      • Data processing
      • Derived datasets
      • rgbif
      • pygbif
      • MAXENT
      • Tools catalogue
    • GBIF labs

      • Species matching
      • Name parser
      • Sequence ID
      • Relative observation trends
      • GBIF data blog
  • Community
    • Network

      • Participant network
      • Nodes
      • Publishers
      • Network contacts
      • Community forum
      • alliance for biodiversity knowledge
    • Volunteers

      • Mentors
      • Ambassadors
      • Translators
      • Citizen scientists
    • Activities

      • Capacity enhancement
      • Programmes & projects
      • Training and learning resources
      • Data Use Club
      • Living Atlases
  • About
    • Inside GBIF

      • What is GBIF?
      • Become a member
      • Governance
      • Implementation plan
      • Work Programme
      • Funders
      • Partnerships
      • Release notes
      • Contacts
    • News & outreach

      • News
      • Newsletters and lists
      • Events
      • Awards
      • Science Review
      • Data use
  • User profile

(Table 1) Calcareous nannofossil distribution at ODP Site 180-1109 from the Solomon Sea, western Pacific

Dataset homepage

Citation

Takahashi K, Okada H (2001). (Table 1) Calcareous nannofossil distribution at ODP Site 180-1109 from the Solomon Sea, western Pacific. PANGAEA - Publishing Network for Geoscientific and Environmental Data. Occurrence dataset https://doi.org/10.1594/pangaea.681324 accessed via GBIF.org on 2023-09-23.

Description

The paleoceanography of the Solomon Sea for the last 195,000 years was investigated, based on the observations of 21 taxonomic groups of calcareous nannofossils in 144 samples taken from tocean drilling program (ODP) cores 1109A-1H and 1109C-2H. Oxygen isotope ratios in tests of the planktonic foraminifer Globigerinoides ruber allow us to assign the cores to oxygen isotope stages 7-1. Past sea-surface temperatures (SST) were estimated qualitatively using the composition of three Gephyrocapsa coccolith morphotypes; the high-, intermediate- and low-angel types that are classified based on the bridge angle of coccolith, can be used as proxies for warm, intermediate and cold temperature, respectively. Abundance of the high-angel type coccoliths increased and decreased during the interglacial and glacial periods, respectively. This tendency is consistent with the expected change of the Western Pacific Warm Pool (WPWP) development. However, a large shift in the abundance of the high-angle type coccolith recorded during early stage 3 did not correspond to the oxygen isotope record. The ratio of small (<2.5 µm) placoliths of Reticulofenetsra and Gephyrocapsa to the low-photic species was higher during stage 2 than late stage 3 and 1. As the reduced blanketed effect to the WPWP would cause an increase in the number of small placoliths, a reduction of the WPWP in stage 2 is indicated by the increase of small placoliths and by the lower SST deduced from the composition of the Gephyrocapsa morphotypes. The decreasing trend of small placoliths after ~40 ka is similar to the results reported in several previous studies in the surrounding regions of Australia.

Taxonomic Coverages

  1. Chromista
    rank: kingdom
  2. rank: kingdom
  3. Protozoa
    rank: kingdom

Geographic Coverages

Event: 180-1109, Solomon Sea ;

Bibliographic Citations

Contacts

Kyoma Takahashi
originator
Hisatake Okada
originator
metadata author
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: https://www.pangaea.de
Frank-Oliver Glöckner
administrative point of contact
Robert Huber
administrative point of contact
What is GBIF? API FAQ Newsletter Privacy Terms and agreements Citation Code of Conduct Acknowledgements
Contact GBIF Secretariat Universitetsparken 15 DK-2100 Copenhagen Ø Denmark
GBIF is a Global Core Biodata Resource