Eastern tropical North Pacific coral radiocarbon reveals North Pacific Gyre Oscillation (NPGO) variability

TitleEastern tropical North Pacific coral radiocarbon reveals North Pacific Gyre Oscillation (NPGO) variability
Publication TypeJournal Article
Year of Publication2017
AuthorsRafter P.A, Sanchez S.C, Ferguson J., Carriquiry J.D, Druffel E.RM, Villaescusa J.A, Southon J.R
JournalQuaternary Science Reviews
Volume160
Pagination108-115
Date Published2017/03
Type of ArticleArticle
ISBN Number0277-3791
Accession NumberWOS:000397374200009
Keywordscalibration; climate; coral; el-nino; enso; gulf-of-california; North Pacific Ocean; Porites; radiocarbon
Abstract

Fluctuations in oceanic circulation and upwelling associated with the North Pacific Gyre Oscillation (NPGO) are the largest source of salinity and nutrient concentration variability across the Pacific basin. Recent observations suggest NPGO-like variability is intensifying, but longer, "pre-instrumental" records are required to improve our understanding of NPGO amplitude and phase change. Here, using measurements of coral skeletal chemistry from San Benedicto Island in the Eastern Tropical North Pacific (ETNP), we assess this region's suitability for reconstructing NPGO behavior. We find that coral geochemical proxy measurements of ETNP salinity and dissolved inorganic carbon radiocarbon (Delta C-14) content reflect NPGO-driven gyre circulation and regional coastal upwelling. These results provide the basis for reconstructing NPGO-related ocean conditions hundreds of years prior to the modern observational record. (C) 2017 Elsevier Ltd. All rights reserved.

DOI10.1016/j.quascirev.2017.02.002
Short TitleQuat. Sci. Rev.
Student Publication: 
Yes
Student: 
sharknado