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Reconstructing past upwelling intensity and the seasonal dynamics of primary productivity along the Peruvian coastline from mollusk shell stable isotopes

Sadler, James; Carre, Matthieu; Azzoug, Moufok; Schauer, Andrew J.; Ledesma, Jesus; Cardenas, Fredy; Chase, B M; Bentaleb, Ilhem; Muller, Serge D.; Mandeng, Magloire; Rohling, Eelco; Sachs, Julian

Description

We present here a potential new method to evaluate past variations of the mean intensity of Peruvian coastal upwelling and of the seasonal timing of phytoplankton blooms. This method uses a combination of the monthly carbon and oxygen isotopic signals preserved in fossil mollusk shells, and a series of corrections to extract the variations of the dissolved inorganic carbon (DIC) δ 13C. Based on the analysis of five shell samples (85 shells in total) from the southern Peruvian coast, we suggest...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/78020
Source: Geochemistry, Geophysics, Geosystems. G3
DOI: 10.1029/2011GC003595

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