VISITORS: Effective 21 July 2014, Visitor Center Security will no longer accept IDs from some US states for site access. Please see security procedures for details.
 

Seminar

Sources of and Factors Determining Dust, Soot, and Ozone in the Western U.S. Mountain Ranges

Speaker: Quinbin Li, Dept. of Atmospheric and Oceanic Sciences, University of California, Los Angeles

When: Wednesday, August 28, 2013, 3:30 p.m. Mountain Time
Location: Room 2A305, DSRC (NOAA Building), 325 Broadway, Boulder
Directions: Refer to More Information under our Seminar Schedule

Remote Access: Webinar Registration and view system requirements. Space is limited. Confirmation of registration includes information about joining the GoToMeeting®.
ALL Seminar attendees agree not to cite, quote, copy, or distribute material presented without the explicit written consent of the seminar presenter. Any opinions expressed in this seminar are those of the speaker alone and do not necessarily reflect the opinions of NOAA or ESRL CSD.

Abstract:

Dust and soot degrade visibility in remote parks in the western U.S. (WUS) and their transport and subsequent deposition onto the snow-covered Rockies and Sierra-Nevada mountain ranges accelerates snowmelt and influences the seasonal availability of fresh water to the western states. Understanding the background surface ozone in the WUS is critical for defining a feasible ambient ozone air quality standard. In this talk I examine the sources of soil dust, soot, and ozone in the western mountainous U.S. by analyzing various observations using a global chemical transport model. I focus specifically on constraining the size distribution and source function of dust, open fire and anthropogenic emissions of soot, and fire and lightning contributions to surface ozone as well as the modulating effect of the N. American monsoon on surface ozone in the WUS.