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Event Time
3:30 p.m.
Atlantic Building Room 2400 & Zoom

AOSC Seminar by Julie Nicely & Daniel Anderson, 3/7/2024

AOSC Seminar

Dr. Julie Nicely & Dr. Daniel Anderson




Towards constraints on the tropospheric oxidizing capacity: the role of models, machine learning, and satellite observations



Numerous trace gases, including pollutants like CO and greenhouse gases like CH4, are oxidized and removed from the atmosphere by the hydroxyl radical (OH).  However, the reactive nature and short lifetime of OH make it highly variable in time and space, impossible to measure on broad scales, and notoriously difficult to constrain across air quality and climate models.  We will walk through research performed by our group aimed at understanding why OH and the resulting methane lifetime differ among global models.   We will also explore how we can utilize current satellite observations to indirectly constrain tropospheric OH and how we can use those constraints to inform OH variability.



Julie Nicely is an assistant research scientist with the Earth System Science Interdisciplinary Center at University of Maryland – College Park and works in the NASA Goddard Space Flight Center (GSFC) Atmospheric Chemistry and Dynamics Lab (Code 614).  She received her B.S. in Chemistry from Duke University and her Ph.D. from the UMD Department of Chemistry and Biochemistry in 2016.  She then completed a NASA Postdoctoral Fellowship at GSFC before joining ESSIC in 2019.  Her research focuses on using a variety of observations and models with techniques such as machine learning to understand oxidizing capacity and the tropospheric chemical system more broadly.


Daniel Anderson is an associate research scientist with GESTAR II at the University of Maryland Baltimore County and works at NASA GSFC.  He has a B.S. in Chemical and Biomolecular Engineering from Cornell University and a Ph.D. in Atmospheric and Oceanic Science from UMD.  He completed his postdoctoral work at Drexel University, focusing on using in situ observations of peroxy radicals to understand ozone chemistry, and began working at GSFC in 2019.   Currently, his research focuses on using satellite observations and models to understand various parts of the earth system, including the atmospheric oxidation capacity and anthropogenic NOx emissions.



Ross Salawitch


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AOSC Seminar

Pre-seminar refreshment: N/A
Seminar: 3:30-4:30pm, Room: ATL 2400(only when in-person)
Meet-the-Speaker: 4:30-5:00pm, Room: ATL 3400(only when in-person) [For AOSC Students only]

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