Replication Data for: Canadian 2023 and 2025 Boreal Forest Wildfires: Downwind Formaldehyde to Nitrogen Dioxide Ratios and Implications for Surface Ozone Production

This dataset contains TXT files (comma-delimited) for the background-corrected enhancement rates and ΔVCDs calculated from TROPOMI satellite measurements using the Gaussian-flux method for the 2023 and 2025 Canadian boreal forest wildfires analyzed in the paper "Canadian 2023 and 2025 Boreal Forest Wildfires: Downwind Formaldehyde to Nitrogen Dioxide Ratios and Implications for Surface Ozone Production" by Hearne et al. (submitted, 2026).
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The CSV files have been named as follows "NameOfFire_Species_Date_oOrbit.0.csv":
<br>(1) NameOfFire is the naming convention found in Hearne et al. (2026),
<br>(2) Species is either CO, HCHO, or NO2,
<br>(3) Date is the date of the fire in YYYYMMDD format, and
<br>(4) oOrbit.0 is the orbit number for TROPOMI overpass led by an "o" and followed by a ".0".
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Inside each CSV file is the following information by column:
<br>(A) "loc" is the location, in 4 km increments, of the start of each integration box, in the downwind direction,
<br>(B) "windspeed" is the average wind speed, in km/hr, of the average wind speed within each 4 km box for 150 km downwind.
<br>(C) "windspeedy" is the wind speed at averaged within each 4 km box,
<br>(D-G) Numbered columns (0,1,...,etc.) are described in detail, below.
<br>(H) "VCD" is the vertical column density enhancement (ΔVCD) in molec/cm^2 (background-corrected, i.e. with the background VCD between 20 to 50 km upwind subtracted),
<br>(I) "Line" is the line density (molec/cm),
<br>(J) "STD" is the standard deviation from the centre of the Gaussian fit profile across the ΔVCDs (molec/cm^2),
<br>(K-N) The last four columns include META DATA for the fire and include the fire name "name", trace gas "species", the data of the fire in YYYYMMDD "date", and TROPOMI overpass "orbit".

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Numbered columns (0, 1, ..., etc.) in the CSV file are background-corrected enhancement rates in tonnes/hour for each species. Each number corresponds to a lifetime (τ) used to calculate the enhancement rates, following the following key:
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<b><u>CO:</b></u>
<br>'0' ---> <b>τ</b> = 336 hours
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<b><u>HCHO:</b></u>
<br>'0' ---> <b>τ</b> = 1.5 hours
<br>'1' ---> <b>τ</b> = 3.0 hours
<br>'2' ---> <b>τ</b> = 6.0 hours
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<u><b>NO2:</b></u>
<br>'0' ---> <b>τ</b> = 1.0 hours
<br>'1' ---> <b>τ</b> = 2.0 hours
<br>'2' ---> <b>τ</b> = 4.0 hours
<br>'3' ---> <b>τ</b> = 6.0 hours