Paleo

linear model accounting for changes in drying ratio and mean source distance
September 4, 2018

A new study shows that a simple linear model that accounts for changes in mean source distance, as well as the local drying ratio, can successfully replicate water isotopic variations in space and time.

Megadrougth schematic and teleconnections
July 16, 2018

To improve estimates of risks associated with megadroughts, researchers look at improving the understanding of ENSO/AMO behavior, their teleconnections, and their response to volcanic eruptions in climate models.

Decadal-scale correlations between northern Gulf of Mexico and global sea surface salinity as well as continental precipitation
February 28, 2018

Researchers show that weakened surface ocean circulation coincides with precipitation during the Little Ice Age and is consistent with little-to-no changes in the larger Atlantic meridional overturning circulation. 

monthly-mean analysis of oxygen isotopes in precipitation and gross primary productivity
October 25, 2017

The most extreme increases in the oxygen 18-to-16 ratio over the last fifty thousand years occur immediately after Heinrich events, strongly suggesting that tropical rainfall shifted south in response to Heinrich events.

Differences between preindustrial (left) and LGM (right) ocean circulation
July 26, 2017

A recent study investigates the drivers of changes in deep ocean circulation across a range of modern and Last Glacial Maximum (~21000 years ago) climate modeling simulations, revealing biases in Antarctic sea ice formation. 

Global-mean surface air temperature (SAT) anomalies with respect to preindustrial reference level. Left panel: Reconstructions of global-mean SAT anomaly for the last 784,000 years based on studies indicated in the panel. Right panel: Reconstructed and simulated global-mean SAT anomaly and global warming projections from data sources indicated in the panel.
November 23, 2016

New research looking at glacial-interglacial climate variability during the last 784,000 years finds that Earth's climate sensitivity is strongly dependent on the climate background state with significantly larger values attained during warm phases. Because the Earth is currently in a warm state, the associated increased climate sensitivity has to be taken into account for future warming projections.

Indo-Pacific tropical rain belt expanded and contracted in the past
October 5, 2016

A new study using a high-resolution stalagmite record from Australia with cave sites in southern China reveal a close coupling of monsoon rainfall on both continents, with numerous synchronous pluvial and drought periods, suggesting that the tropical rain belt expanded and contracted numerous times at multidecadal to centennial scales.

Subscribe to Paleo