Ozone Concentration versus Temperature: Atmospheric Aging of Soot Particles

Internally mixed soot particles

Internally mixed soot, sulfates, and organic matter in aerosol particles from Mexico City K. Adachi and P. R. Buseck School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, USA Received: 7 April 2008 – Accepted: 14 April 2008 – Published: 22 May 2008 Correspondence to: P. R. Buseck (pbuseck@as...

Atmospheric Soundings of Temperature, Moisture and Ozone from AIRS

The Interaction of Ozone with Soot

Introduction Atmospheric soot concentrations range from 0.5 ng m in the stratosphere up to 20 μg m in polluted urban atmospheres. Due to its irregular agglomerate structure soot aerosol offers a large surface area for interactions with reactive trace gases like ozone. Recent model results indicated that ozone concentrations in the stratosphere and upper troposphere (Lary et al, 1997; Bekki, 199...

Key role of organic carbon in the sunlight-enhanced atmospheric aging of soot by O2.

Soot particles are ubiquitous in the atmosphere and have important climatic and health effects. The aging processes of soot during long-range transport result in variability in its morphology, microstructure, and hygroscopic and optical properties, subsequently leading to the modification of soot's climatic and health effects. In the present study the aging process of soot by molecular O(2) und...

Atmospheric number size distributions of soot particles and estimation of emission factors

Number fractions of externally mixed particles of four different sizes (30, 50, 80, and 150 nm in diameter) were measured using a Volatility Tandem DMA. The system was operated in a street canyon (Eisenbahnstrasse, EI) and at an urban background site (Institute for Tropospheric Research, IfT), both in the city of Leipzig, Germany as well as at a rural site (Melpitz (ME), a village near Leipzig)...