Cooperative Institute for Research in Environmental Sciences

Analytical Chemistry Seminar: Steven Brown and Aroob Abdelhamid

Analytical Chemistry Seminar: Steven Brown and Aroob Abdelhamid

Nitrogen Oxides and Aerosols (NOAA): Some applications of cavity enhance spectroscopy in atmospheric chemistry

Steven S. Brown - Chemical Sciences Division, NOAA Earth System Research Lab
, Department of Chemistry and Biochemistry, University of Colorado

Nitrogen oxides (NOx) are emitted from both anthropogenic and natural processes and critically influence the oxidizing capacity of the atmosphere.  Aerosols arise from a variety of sources and impact climate through their radiative effects and atmospheric chemistry through heterogeneous and multiphase reactions. Nitrogen oxides in particular undergo distinct heterogeneous reactions that link gas and aerosol phase chemistry. Both nitrogen oxides and aerosols are amenable to measurement by new, high sensitivity optical techniques known as cavity enhanced spectroscopy. I will survey some recent efforts and future projects toward development of this instrumentation, as well as several applications, including nighttime chemistry, wintertime photochemistry and aerosol optical properties.

Isoprene hydroxynitrates and isoprene carbonylnitrates: kinetics and mechanisms

Aroob Abdelhamid - 1st Year Grad Student, Department of Chemistry and Biochemistry

Aroob Abdelhamid is a first year graduate student who completed her undergraduate degree at California State University, Fresno. She researched under Dr. Alam Hasson for approximately 3 years. One of the projects she worked on while there involved studying the reactions of isoprene hydroxy nitrate and its cousin isoprene carbonyl nitrate, products formed by oxidation of isoprene under high NOx. In her talk, Aroob will discuss the importance of these compounds as well as kinetic and mechanistic results she and the Hasson group obtained.

Jointly sponsored by the Department of Chemistry and Biochemistry, CIRES, and the Environmental Program


ESOC Reading Room, Ekeley W230 - 1665 Central Campus Mall, Boulder, CO 80309