Seawater isotope constraints on tropical hydrology during the Holocene

Holocene constraints on simulated tropical Pacific dynamics

Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, USA School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA UM2-CNRS-IRD, Institut des Sciences de l’Evolution, Université Montpellier 2, Montpellier 34095, France IPSL/LSCE, unité mixte CEA-CNRS-UVSQ, Gif sur Yvette 91191, France Sorbonne Universités, UPMC Univ. Par...

The isotope hydrology of Quaternary climate change.

Understanding the links between climate change and human migration and culture is an important theme in Quaternary archaeology. While oxygen and hydrogen stable isotopes in high-latitude ice cores provide the ultimate detailed record of palaeoclimate extending back to the Middle Pleistocene, groundwater can act as a climate archive for areas at lower latitudes, permitting a degree of calibratio...

Carbonate clumped isotope constraints on Silurian ocean temperature and seawater Î ́18O

Much of what we know about the history of Earth’s climate derives from the chemistry of carbonate minerals in the sedimentary record. The oxygen isotopic compositions (dO) of calcitic marine fossils and cements have been widely used as a proxy for past seawater temperatures, but application of this proxy to deep geologic time is complicated by diagenetic alteration and uncertainties in the dO o...

Constraints on the salinity–oxygen isotope relationship in the central tropical Pacific Ocean

Seawater sulfur isotope fluctuations in the Cretaceous.

The exogenic sulfur cycle is tightly coupled with the carbon and oxygen cycles, and therefore a central component of Earth's biogeochemistry. Here we present a high-resolution record of the sulfur isotopic composition of seawater sulfate for the Cretaceous. The general enrichment of isotopically light sulfur that prevailed during the Cretaceous may have been due to increased volcanic and hydrot...