Tropical decadal variability in nutrient supply and phytoplankton community in the Central Equatorial Pacific during the late Holocene.

ABSTRACT: We have reconstructed baseline δ¹⁵N and δ¹³C of export production at Kingman Reef in the Central Equatorial Pacific (CEP) at sub-decadal resolution, nearly continuously over the last 2000 years. The changes in δ¹⁵N reflects the strength of the North Equatorial Counter Current (NECC) relative to the South Equatorial Current (SEC), and to a lesser extent, the North Equatorial Current (NEC). Seasonal to multi-decadal variation in the strength of these currents, through the redistribution of heat, have global climate impacts and influence marine and terrestrial ecosystems. We use modern El Niño-La Nina dynamics and the Tropical Pacific Decadal Variability (TPDV) pattern, which is defined in the CEP, as a framework for analyzing the isotopic data. The CEP δ

SUBMITTER: Guilderson TP 

PROVIDER: S-EPMC10879156 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature