[Eoas-seminar] EOAS Colloquium, March 13, 2026 at 3:00 PM

[eoas-seminar at lists.fsu.edu]

Hi all,



I am happy to announce that we will have an EOAS colloquium this Friday, March 13, 2026. The following is the information about the colloquium:



Speaker: Drs. Michael Diamond and Emily Stewart, Florida State University



Title: Metamorphic Sulfur Release As A Driver Of Sustained Cooling And Mass Extinction



Abstract:

The emplacement of large igneous provinces may drive catastrophic volatile release, both directly through volcanic degassing and indirectly through heating of carbon and sulfur-bearing host sediments. It is broadly assumed that sulfur injection must reach the stratosphere to drive long-term cooling, thus these indirect metamorphic sulfur emissions have been almost entirely ignored. Here we demonstrate that plausible carbon and sulfur emissions from contact metamorphism may be sustained long enough to cause centennial-scale sulfate aerosol-driven cooling spikes of several Kelvin superimposed on millennial-scale warming from the carbon dioxide greenhouse effect. We use modeling of sediment metamorphism along with simple carbon cycle and planetary energy balance models of the climate response to explore this relationship. Our results suggest that a metamorphic sulfur source should be considered as a driver of sustained global cooling during large igneous province emplacement, with potential implications for Phanerozoic biotic crises such as the End-Triassic Mass Extinction.

Time: 3:00 PM, Friday, March 13, 2026



Location: EOA 1044



Contact: Prof. Zhaohua Wu (zwu at fsu.edu)



A flyer of the colloquium is also attached.



Cheers,



Zhaohua



***************************************************************

Zhaohua Wu, Professor

Earth, Ocean, and Atmospheric Science Building, Room 6041, and

Center for Ocean-Atmospheric Prediction Studies, Room 295

Florida State University

Tallahassee, Florida

zwu at fsu.edu<mailto:zwu at fsu.edu>

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