Urban flask measurements of CO₂ff and CO to identify emission sources at different site types in Auckland, New Zealand.

ABSTRACT: As part of the CarbonWatch-NZ research programme, air samples were collected at 28 sites around Auckland, New Zealand, to determine the atmospheric ratio (R_CO) of excess (local enhancement over background) carbon monoxide to fossil CO₂ (CO₂ff). Sites were categorized into seven types (background, forest, industrial, suburban, urban, downwind and motorway) to observe R_CO around Auckland. Motorway flasks observed R_CO of 14 ± 1 ppb ppm^-1 and were used to evaluate traffic R_CO. The similarity between suburban (14 ± 1 ppb ppm^-1) and traffic R_CO suggests that traffic dominates suburban CO₂ff emissions during daytime hours, the period of flask collection.

SUBMITTER: Young HA 

PROVIDER: S-EPMC10642768 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature