Observational Analyses of Dry Intrusions and Increased Ozone Concentrations in the Environment of Wildfires

Atmosphere

Stephen A. Tjemkes¹  Jose Prieto²  Christo G. Georgiev³  Athanasios Karagiannidis⁴  Konstantinos Lagouvardos⁴ 

[1] AER Division, Verisk Analytics GmbH, 80331 München, Germany;EUMETSAT, 64295 Darmstadt, Germany;Forecasts and Information Service Department, National Institute of Meteorology and Hydrology, 1784 Sofia, Bulgaria;National Observatory of Athens, Institute for Environmental Research and Sustainable Development, Lofos Koufou, Penteli, 15236 Athens, Greece;

关键词: stratospheric intrusions;    wildfires;    ozone concentrations;    satellite observations;   

DOI  :  10.3390/atmos13040597

来源: DOAJ

【 摘 要 】

In this study, atmospheric dynamical processes, which govern the intensification of wildfire activity and the associated increase in low-level ozone concentrations, were studied using images, advanced products and vertical profiles derived from satellite observations. The analyses confirm that the influence of deep stratospheric intrusions, identified in the satellite water vapor imagery, on a fire-risk area contributes to the increase in fire activity. The depth of dry stratospheric intrusions, the associated synoptic evolution and the enhanced low-level ozone concentrations caused by vertical transport of stratospheric air and/or related to biomass burning emissions were analyzed using satellite measurements from SEVIRI, IASI and CrIS instruments, complemented with surface observations near the wildfires’ locations. It is shown that the spatial and vertical resolutions of these soundings provide a way of identifying areas of enhanced ozone downwind of wildfires. Influences of the upper-troposphere dynamics and the wind field evolution as factors of uncertainty and complexity in studying the ozone production from wildfire emissions are considered. The combination of satellite soundings and satellite estimations of fire radiative energy and WV imagery may contribute to better understand the ozone enhancement associated with stratospheric intrusion and wildfire emissions.

【 授权许可】

Unknown