Explore daily NO₂ measurements from five Toronto sites on this interactive plot. Use the legend to toggle sites, and tools to adjust the view. The plot updates automatically each day and may take a moment to load.

To view the full datasets and in full screen, you can visit:

https://tame-bokeh.physics.utoronto.ca/pandora_GTA_NO2

For a deeper look at how NO₂ is analyzed using Pandora ground-based measurements, see: Herman, J., A. Cede, E. Spinei, G. Mount, M. Tzortziou, and N. Abuhassan (2009). NO₂ column amounts from ground-based Pandora and MFDOAS spectrometers using the direct-sun DOAS technique: Intercomparisons and application to OMI validation. Journal of Geophysical Research: Atmospheres, 114, D13307. https://doi.org/10.1029/2009JD011848.