Archive · collection · 2002
Sedimentology of ODP Site 177-1090 and core PS2489-2 in the southeastern South Atlantic
Listed in PANGAEA and DataCite — shown once because both records carry DOI 10.1594/pangaea.706200
One important goal of Leg 177 of the Ocean Drilling Program (ODP) was to explore the nature of the mid-Pleistocene climate transition (MPT) on the southern hemisphere.
Description
A suitable MPT record was encountered at Site 1090 in the southeastern South Atlantic, where a 44-m-thick sequence of Quaternary diatom-bearing foraminiferal muds and oozes was recovered on the Agulhas Ridge. Environmental responses to the MPT comprised changes in terrestrial climate, biological productivity, and regional ocean circulation, as inferred from compositional sediment data and clay mineralogy.
A shift towards more arid conditions occurred between 900 and 800 ka in southern Africa. Changes in palaeoceanography already started earlier. Since 1150 ka, northward displacements of the Polar Front appeared during glacial periods and shifted the area of dominant diatom deposition towards Site 1090.
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Likewise, glacial-interglacial contrasts in regional conveyor circulation strengthened after 1200 ka and became most severe after 650 ka. However, while changes in regional conveyor circulation likely responded in tune with global ice-volume changes and show the onset of 100-kyr cycles after 1200 ka, an unusual 130-kyr pattern characterises the pattern of frontal movements between 1200 ka and 650 ka, probably in response to imperfect adaptation of regional climate to the global 100-kyr climate cycles.
Links
Where it is published
- Repository landing page doi.pangaea.de/10.1594/PANGAEA.706200 ↗
landing page · from DataCite
- DOI doi.org/10.1594/pangaea.706200 ↗
DOI / persistent id · from PANGAEA
Documentation and papers
- Creative Commons Attribution 3.0 Unported creativecommons.org/licenses/by/3.0/legalcode ↗
license · from DataCite
- IsSupplementTo 10.1016/s0031-0182(01)00498-9 doi.org/10.1016/s0031-0182(01)00498-9 ↗
publication · from DataCite
- References 10.2973/odp.proc.sr.177.116.2003 doi.org/10.2973/odp.proc.sr.177.116.2003 ↗
publication · from DataCite
Catalogue records · 3
- DataCite API api.datacite.org/dois/10.1594/pangaea.706200 ↗
metadata API · from DataCite
- OAI-PMH record ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=oai_dc&identifier=o… ↗
metadata API · from PANGAEA
- DataCite Commons commons.datacite.org/doi.org/10.1594/pangaea.706200 ↗
catalogue entry · from DataCite
Topics
- From keywords
- Earth & Environmental Science
Provenance · 2 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| PANGAEA | oai:pangaea.de:doi:10.1594/PANGAEA.706200 | 14 d ago | JSON v1 |
| DataCite | 10.1594/pangaea.706200 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · PANGAEA | connector:pangaea@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · PANGAEA | connector:pangaea@1.0.0 | |
| description | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/description |
| license | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/rights |
| publication_date | source · PANGAEA | connector:pangaea@1.0.0 | |
| spatial | source · PANGAEA | connector:pangaea@1.0.0 | |
| title | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/title |