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Mid-Piacenzian sea surface temperature record from ODP Site 1115 in the western equatorial Pacific

Stratigraphy

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Abstract

Planktic foraminifer assemblages and alkenone unsaturation ratios have been analyzed for the mid-Piacen-zian (3.3 to 2.9 Ma) section of Ocean Drilling Program (ODP) Site 1115B, located in the western equatorial Pacific off the coast of New Guinea. Cold and warm season sea surface temperature (SST) estimates were determined using a modern analog technique. ODP Site 1115 is located just south of the transition between the planktic foraminifer tropical and subtropical faunal provinces and approximates the southern boundary of the western equatorial Pacific (WEP) warm pool. Comparison of the faunal and alkenone SST estimates (presented here) with an existing nannofossil climate proxy shows similar trends. Results of this analysis show increased seasonal variability during the middle of the sampled section (3.22 to 3.10 Ma), suggesting a possible northward migration of both the subtropical faunal province and the southern boundary of the WEP warm pool.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mid-Piacenzian sea surface temperature record from ODP Site 1115 in the western equatorial Pacific
Series title:
Stratigraphy
Volume
7
Issue:
1
Year Published:
2010
Language:
English
Publisher:
Micropaleontology Press
Publisher location:
Flushing, NY
Contributing office(s):
Eastern Geology and Paleoclimate Science Center
Description:
6 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1
Last page:
6
Additional Online Files(Y/N):
N