Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 14
Articles | Volume 25, issue 14
https://doi.org/10.5194/acp-25-7777-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-7777-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 14
Measurement report
 | 
23 Jul 2025
Measurement report |  | 23 Jul 2025

Measurement report: Diurnal variability in NO2 and HCHO lower-tropospheric vertical profiles in southeastern Los Angeles

Peter K. Peterson, Lisa F. Hernandez, Leslie Tanaka, and Alejandro Dunnick

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Short summary
This work uses spectroscopy to examine the vertical distribution of nitrogen dioxide and formaldehyde in southeastern Los Angeles, USA, a region heavily impacted by ozone pollution. We examine how both the amount and vertical profile of the two species vary throughout the day, finding that differences between the two species impact the utilization of satellite-based measurements to diagnose ozone production chemistry and that these impacts are variable depending on the time of day.
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