You are here

New NSF project awarded to the School of Geosciences

Top Stories

CO2 levels now higher than any time in the last 23 million years

One of the most pressing messages that climate scientists attempt to convey to the public is how today’s CO2 levels compare to those of the Geologic past. Such comparisons can provide public context for current CO2 rise, as well as important information on the response of global temperatures to rising CO2. A new study published in Geology suggests that present-day CO2 levels (412 ppmv) are now likely higher than at any time in at least the last 23 million years!

In this newly published study, a team led by Brian Schubert, Associate Professor in the School of Geosciences at the University of Louisiana at Lafayette, used the remains of dead plants to produce a new record of atmospheric CO2 that spans 23 million years of uninterrupted Earth history. Their findings relied on the nearly continuous record of terrestrial photosynthesis provided by organic matter accumulated from partially decomposed plants.

“When plants grow, the relative amount of the two stable isotopes of carbon, carbon-12 and carbon-13, changes in response to the amount of CO2 in the atmosphere,” says Schubert. “One can therefore measure the relative amount of these two isotopes and calculate the CO2 concentration under which the plants grew.”

The remains of land plants can be used to calculate the amount of CO2 in Earth’s atmosphere. Photo credit: A. Hope Jahren

Read More ➝

Two Graduate Students win the GSA Graduate Research Grant

Please join us in congratulating two of our graduate students who recently won a GSA Graduate Research Grant for 202

Read More ➝

The School of Geosciences wins prestigious Field Camp Award

As our 2020 virtual field camp is kicking off today, our School has just been informed that we are this year's recip

Read More ➝

Assistant Professor Aubrey Hillman is the PI of a new NSF-funded project that will investigate whether climate variability over the last 4000 years (specifically El Nino events) played a role in social reorganization by reconstructing climate in a remote Peruvian lake that is situated up-valley of archaeological sites dating to 1000-1400 AD.

Project Title: Coupling and Cohesion as Factors Affecting Vulnerability to Abrupt Climate Change
co-PIs: Dr. Benjamin Vining at the University of Arkansas and Dr. Daniel Contreras at the University of Maryland

SHARE THIS |