Ozone production from Canadian wildfires during June and July of 1995

作者：S. A. McKeen, Gerhard Wotawa, D. D. Parrish, J. S. Holloway, M. P. Buhr, G. Hübler, F. C. Fehsenfeld, J. F. Meagher · 发表于：Journal of Geophysical Research Atmospheres · 年份：2002 · DOI：10.1029/2001jd000697 · 被引用次数：188 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Atmospheric Ozone and Climate

During the summer of 1995, especially between June and mid July, extensive wildfires occurred throughout Canada, primarily north of 55°N latitude. A previous report used aircraft and surface observations and tracer simulations to show these fires strongly influenced CO concentrations as far south as 35°N in the central and eastern United States [ Wotawa and Trainer, 2000 ]. This study extends those results by incorporating wildfire emissions estimates for CO, NOx, and nonmethane hydrocarbons into a three‐dimensional photochemical transport model specifically designed to simulate ozone photochemistry in the continental United States. The results of the model are compared to observations from four measurement platforms deployed during the time period of interest: National Oceanic and Atmospheric Administration WP‐3 aircraft observations collected during the 1995 Southern Oxidants Study (SOS‐95) field campaign; 12 eastern U.S. surface stations that measured ozone, CO, and NOy; rural ozone measurements from the Aerometric Information Retrieval System network collected by the U.S. Environmental Protection Agency; and daily ozonesondes obtained near Nashville, Tennessee, during SOS‐95. Model performance, as determined by correlation and bias with observations from these four platforms, is significantly improved for both O3and CO when the Canadian fires are considered. Both observations and model results show enhanced O3from air transported from the Northwest Territory. The model re...