Yutaka Kondo

TL;DR: In this article, the authors used three fundamentally different approaches to derive the degree of chemical ozone loss from ozonesonde, balloon, aircraft, and satellite instruments and showed that the ozone losses derived from these different instruments and approaches agree very well, resulting in a high level of confidence in the results.

TL;DR: In this paper, the authors compared the ambient measurements of hydrocarbons, carbon monoxide and nitrogen oxides from three non-US mega-cities (Beijing, Mexico City, Tokyo) with similar measurements from US cities in the mid-1980s and the early 2000s.

TL;DR: In this paper, a new method to measure refractive indices m of small nonspherical particles by simultaneous measurement of particle volume and light-scattering cross section was proposed, which can suppress uncertainties due to unknown particle shape.

TL;DR: In this paper, the authors measured the concentrations of elemental carbon (EC), carbon monoxide (CO), and carbon dioxide (CO2) in Beijing between 2005 and 2006 using a semicontinuous thermal optical analyzer.

TL;DR: In this article, mass concentrations of black carbon (BC) (M BC) can be estimated by the measurement of the light absorption coefficient of BC, which is the conversion factor from b abs to M BC.