Age models for sediment cores in the eastern tropical Pacific

Laetitia Pichevin, Raja S Ganeshram, Stephen Francavilla, Elsa Arellano-Torres, Thomas F Pedersen & Luc Beaufort
We present new high-resolution N isotope records from the Gulf of Tehuantepec and the Nicaragua Basin spanning the last 50-70 ka. The Tehuantepec site is situated within the core of the north subtropical denitrification zone while the Nicaragua site is at the southern boundary. The d15N record from Nicaragua shows an 'Antarctic' timing similar to denitrification changes observed off Peru-Chile but is radically different from the northern records. We attribute this to the leakage of...
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