Two talks on Monday August 24th at 12pm:

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1. "The role of local resuspension on oxygen exposure time"

Julia Moriarty

Assistant Professor, CU Boulder, INSTAAR and ATOC

Summary - The burial of particulate organic carbon in the ocean is typically related to the amount of time that material is exposed to oxygen (this is called “oxygen exposure time”, or OET). Yet, this relationship overpredicts burial in carbon-rich coastal regions by almost an order of magnitude, likely because estimates of OET neglect processes such as resuspension and transport of organic matter within the water column. This talk will explore a new way of estimating OET that accounts for resuspension. We will then show that local resuspension can double OET on the Rhone sub-aqueous delta, consider idealized environments, and discuss implications for carbon burial.

Bio - Julia Moriarty arrived at INSTAAR in 2020 and is an assistant professor in the Department of Atmospheric and Oceanic Sciences. Before that, she got her M.S. and Ph.D. from the Virginia Institute of Marine Science and was a post-doc at the U.S. Geological Survey in Woods Hole, Massachusetts. Her group’s research focuses on the transport of sediment, nutrients and contaminants in the coastal ocean in the coastal Arctic and beyond. She also develops new modeling approaches and contributes to the open-source modeling community.

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2. "Dual utilization of oxidation flow reactors for methane: From atmospheric chemistry to emission mitigation"

Jianghanyang "Ben" Li

Assistant Professor, CU Boulder, INSTAAR and ATOC

Summary - Methane is a powerful greenhouse gas, yet major uncertainties remain in its global budget. In this talk, I will show how oxidation flow reactors can rapidly reproduce atmospheric methane oxidation in the lab, advancing isotopic observations as a powerful tool for constraining the global methane budget. I will also discuss how the same technology could be adapted into a new photochemical reactor for removing methane from dilute emission sources such as dairy farms, illustrating how fundamental atmospheric chemistry research can  transform into potential climate solutions.

Bio - Jianghanyang (Ben) Li is an Assistant Professor in the Department of ATOC and INSTAAR at the University of Colorado Boulder. Before joining CU Boulder, he earned his Ph.D. in atmospheric chemistry from Purdue University and postdoctoral research at NOAA’s Global Monitoring Laboratory. His research combines laboratory experiments, field observations, and isotope measurements to better understand atmospheric chemistry processes of air pollutants and greenhouse gases.

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INSTAAR Seminar Series

All seminars are hybrid events, in person and via Zoom.

Audience: All are welcome

Location: Online and in SEEC S228. 4001 Discovery Drive, Boulder, CO.