Abstract
Nitric oxide (NO) and carbon monoxide (CO) in Shanghai urban atmosphere have been measured during the EXPO 2010 by an optical trace gas monitoring system based on room-temperature pulsed quantum cascade lasers (QCL). The results showed obvious diurnal variation in their concentrations. A great correlation was found by analyzing the diurnal variation, indicating common emission sources for both NO and CO. However analysis of the data from street canyon measurements showed that on a vehicle-by-vehicle basis NO emissions correlated only weakly with CO emissions. A possible explanation to this issue has been given.
Original language | English |
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Pages (from-to) | 20224-20232 |
Number of pages | 9 |
Journal | Optics Express |
Volume | 19 |
Issue number | 21 |
DOIs | |
Publication status | Published - 10 Oct 2011 |
Externally published | Yes |