Seasonal Variations in Peruvian Marine Reservoir Age from Pre-Bomb Argopecten Purpuratus Shell Carbonate

• DOI: 10.1017/s0033822200042740
• Publication Date: 2016-07-20T01:15:05Z
• Authors: Kevin B Jones; Gregory W L Hodgins; David L Dettman; C Fred T Andrus; April Nelson; Miguel F Etayo-Ca...
• Keywords: 13. Climate action; 14. Life underwater; 01 natural sciences; 0105 earth and related environmental sciences

Marine upwelling along coastal Peru can be intense and variable, making radiocarbon dating marine systems complex. Historical proxy records of are few, long-lived species such as corals do not grow in the cold waters. Mollusk shell carbonate, however, record both magnitude local reservoir correction, ΔR, seasonal oscillations ventilation age If large, these would complicate organisms. To examine this possibility, we sampled for δ 13 C, 18 O, 14 C content a set pre-bomb Argopecten purpuratus shells collected from during 1908 1926. Intrashell variations up to 216 yr were noted, but consistently correlated with changes O or C. Only an 11 difference was observed weighted average ΔR Callao Bay normal (1908) El Niño (1926) years. Despite intrashell variation values all 3 sample sites years overlap at 1 σ. We report 183 ± 194 23 (12°4′S), 165 24 Salaverry (8°14′S), 189 Sechura (5°45′S).