Pliocene Weakening of Gradients in Temperature but Not in Productivity in the Eastern Equatorial Pacific
K. M. Kimble,
T. D. Herbert,
C. A. Jones
Abstract:The modern eastern equatorial Pacific Ocean (EEP) exhibits strong upwelling, producing pronounced gradients in sea surface temperature (SST), nutrient concentration, and biological productivity between 80° and 140°W. During the globally warmer late Pliocene (3.0–3.6 Ma), the EEP may have experienced permanent El Niño‐like conditions, supported by a reduced SST gradient across the equatorial Pacific. However, the weakened east‐west SST gradient has been controversial, with disparate results depending on the pro… Show more
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