Abstract

Tropical and subtropical hydrological systems are important to water resource management. To improve understanding of these dynamical systems, it is useful to probe their relationship with relevant forcings. Historically, insolation is believed to be a major driver of these dynamics, testable using speleothem stable oxygen isotope (δ18O ${\delta }^{18}\mathrm{O}$) records, whose growth regions and precise chronologies enable detailed investigations of tropical/subtropical hydrology. Here we present a systematic analysis of long speleothem records examining the global relationship between δ18O ${\delta }^{18}\mathrm{O}$ and insolation across different timescales and regions. Our analysis reveals that the relationship between speleothem δ18O ${\delta }^{18}\mathrm{O}$ and insolation varies significantly by region, with no latitude, season, or periodicity of insolation bearing global relevance. We demonstrate …

Date

January 1, 1970

Authors

Alexander James, Julien Emile‐Geay, Judson W Partin, Deborah Khider

Journal

Paleoceanography and Paleoclimatology

Volume

40

Issue

8

Pages

e2024PA005098