Modern sea surface productivity and temperature estimations off Chile as detected by coccolith accumulation rates

Saavedra-Pellitero, M.; Baumann, K.-H.; Hernandez Almeida, Ivan; Flores, J.A.; Sierro, F.J. (2013). Modern sea surface productivity and temperature estimations off Chile as detected by coccolith accumulation rates. Palaeogeography, Palaeoclimatology, Palaeoecology, 392, pp. 534-545. Elsevier 10.1016/j.palaeo.2013.10.010

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Recent coccoliths from 74 surface sediment samples recovered from the southeastern Pacific off Chile were examined quantitatively to investigate modern regional gradients of sea surface productivity and temperature. All findings are based on coccolith accumulation rates. Therefore an approach was designed to estimate recent sedimentation rates based on 210Pb and bulk chemistry analyses of the same set of surface samples. Highest total coccolith accumulation rates were found off north-central Chile, where seasonal upwelling takes place. Based on a multiple linear regression between calculated coccolith accumulation rates and World Ocean Atlas derived sea surface temperatures, a calibration model to reconstruct annual average temperatures of the uppermost 75 m of the water column is provided. The model was cross-validated and the SST estimates were compared with SST observed and SST estimates based on diatoms and planktonic foraminifera, showing a good correlation.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Paleolimnology
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Hernandez Almeida, Ivan

Subjects:

500 Science > 550 Earth sciences & geology
900 History > 910 Geography & travel

ISSN:

0031-0182

Publisher:

Elsevier

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

16 Jan 2014 13:14

Last Modified:

09 Oct 2015 16:11

Publisher DOI:

10.1016/j.palaeo.2013.10.010

Uncontrolled Keywords:

Coccolithophores, Coccolith, Sea surface temperature, Productivity, Pacific

BORIS DOI:

10.7892/boris.39363

URI:

https://boris.unibe.ch/id/eprint/39363

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