TY - JOUR
T1 - Modern sea surface productivity and temperature estimations off Chile as detected by coccolith accumulation rates
AU - Saavedra-Pellitero, M.
AU - Baumann, K. H.
AU - Hernández-Almeida, I.
AU - Flores, J. A.
AU - Sierro, F. J.
N1 - Funding Information:
This work was funded by the Spanish “ Programa Nacional de Movilidad de Recursos Humanos del Plan Nacional de I+D+i ” and specifically by the MEC Postdoc grant ( EX2009-0177 ) awarded to Mariem Saavedra-Pellitero.
PY - 2013/12/15
Y1 - 2013/12/15
N2 - 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 75m 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.
AB - 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 75m 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.
KW - Coccolith
KW - Coccolithophores
KW - Pacific
KW - productivity
KW - sea surface temperature
UR - http://www.scopus.com/inward/record.url?scp=84887940003&partnerID=8YFLogxK
U2 - 10.1016/j.palaeo.2013.10.010
DO - 10.1016/j.palaeo.2013.10.010
M3 - Article
AN - SCOPUS:84887940003
SN - 0031-0182
VL - 392
SP - 534
EP - 545
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
ER -