The West Pacific Warm Pool (WPWP) is a critical region of the global climate system that is closely linked with the El Niño-Southern Oscillation (ENSO). We have generated two monthly resolved coral δ18O (δ18OCRL) records from a key region of the WPWP, the Republic of Palau (7′N, 135′E). The isotopic time series span the years 1793-2008 and 1899-2008. During the period of overlap, the two records are well correlated at interannual and annual periods. Multiple lines of evidence demonstrate a strong ENSO signal in Palau δ18OCRL. Our records are consistent with previous investigations of twentieth-century tropical Pacific climate variability. We identify a regionally coherent bi-decadal cycle in the WPWP following the termination of the Little Ice Age. The Palau δ18OCRL records show long-term trends towards warming/freshening, suggesting a century scale increase in the strength of the hydrologic cycle associated with the WPWP. Our study represents an important addition to the network of tropical paleo-archives. © 2014 Springer-Verlag Berlin Heidelberg.
- El Niño-Southern Oscillation (ENSO)
- Little Ice Age (LIA)
- Oxygen isotopes