Friday, November 3, 2017 - 12:00pm to 1:00pm
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100F Pierce Hall, 29 Oxford St., Cambridge

Atmospheric & Environmental Chemistry Seminar

"Formaldehyde Variability in the Remote Troposphere: First Impressions from ATOM and a Motivation for Remote Sensing of OH" with Tom Hanisco, NASA, a research physical scientist in the Atmospheric Chemistry and Dynamics branch. His research focuses on laboratory and field experiments pertaining to atmospheric chemistry and composition. His lab is the In Situ Observations lab that develops instrumentation for aircraft.

Abstract: As both an oxidation marker and a radical precursor, formaldehyde (HCHO) is central to tropospheric chemistry. Global observations from NASA’s Atmospheric Tomography (ATom) mission indicate significant gradients in the latitudinal and vertical distribution of HCHO. We explore this variability with the aid of a 0-D box model (F0AM), using the full suite of ATom measurements to quantify the drivers of HCHO variability along the ATom flight track. Specifically, we compare the roles of oxidative capacity and hydrocarbon loading in controlling the HCHO budget. These results show the power of the ATOM approach to atmospheric sampling and underscore the importance for more extensive global measurements of atmospheric oxidants.  With this as motivation, we also discuss the preliminary design and expected performance of an instrument concept to measure OH remotely using integrated path differential absorption LIDAR.

Contact Name: 

Brenda Mathieu

Research Areas: 

Harvard University
Center for the Environment

Address: 26 Oxford Street, 4th Floor, Cambridge
Phone: (617) 495-0368

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