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 Western Canadian boreal forest wildfires and the 2019 FIREX-AQ wildfires analyzed in the paper "Summer 2023 Canadian Boreal Forest Wildfires: An Analysis of CO, HCHO, and NO2 Downwind Enhancement Rates" by Hearne et al. (submitted, 2025). <br><br>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. (2025), <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".<br><br><br>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".<br><br><br>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:<br><br><b><u>CO:</u></b> <br>'0' ---> <b>τ</b> = 336 hours<br><br><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<br><br><b><u>NO2:</u></b> <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

This dataset includes the infrared absorption cross-section measurements used in 'Measurements of infrared absorption cross-sections for chloroiodomethane and 2-iodopropane from 305 to 340 K' by Ishtiak et al. (submitted, 2025). The dataset includes: (1) the absorption cross-sections for chloroiodomethane (CH2ICl), labeled as CH2ICl; (2) the absorption cross-sections for 2-iodopropane ((CH3)2CHI), labeled as (CH3)2CHI. Three absorption cross-sections are provided for each compound, labeled by the sample temperature from 300 to 340 K. All measurements were made using an ABB Bomem DA8 Fourier Transform InfraRed (FTIR) spectrometer. These cross-section files have an uncertainty at 2 standard deviations. The dataset also includes density functional theory geometries and unscaled and scaled frequencies for all conformers of chloroiodomethane and 2-iodopropane. These calculations use four density functionals, B3LYP, ωB97X, B2PLYP, and DSD-BLYP with and without the D3 dispersion correction across three basis sets: def2-SVP, def2-TZVPPD, and def2-QZVPPD.

This dataset includes the infrared absorption cross-section measurements and DFT calculations used in 'Measurements of infrared absorption cross-sections for 1H-perfluorohexane and perfluoro-2-methyl-2-pentene from 300 to 340 K' by Ishtiak et al. (2025). The dataset includes: (1) the absorption cross-sections for 1H-perfluorohexane (HFC-52-13P), labeled as C6HF13; (2) the absorption cross-sections for perfluoro-2-methyl-2-pentene, labeled as C6F12; and (3) DFT parameters as below. Five absorption cross-sections are provided for each compound, labeled by the sample temperature from 300 to 340 K. All measurements were made using an ABB Bomem DA8 Fourier Transform InfraRed (FTIR) spectrometer. The original cross-section files have an uncertainty at 3 standard deviations, while the updated files (tagged V2) have an uncertainty at 2 standard deviations (consistent with the description in the published paper). The dataset has been updated to include density functional theory geometries, and unscaled and scaled frequencies for all conformers of 1H-perfluorohexane and perfluoro-2-methyl-2-pentene. The ORCA 5.0.3 software package was used for these calculations (Neese et al. 2020) doi:10.1063/5.0004608.

This dataset includes the infrared absorption cross-section measurements used in 'Measurements of perfluoro-n-hexane and perfluoro-2-methylpentane absorption cross-sections from 298 to 350 K' by Ishtiak et al. (2023b). The dataset includes (1) the absorption cross-sections for perfluoro-n-hexane [n-C6F14], labeled as nPFC6. (2) the absorption cross-sections for perfluoro-2-methylpentane [i-C6F14], labeled as iPFC6. Nine absorption cross-sections are provided for each compound, labeled by the sample temperature from 298 to 350 K. All measurements were made using an ABB Bomem DA8 Fourier Transform InfraRed (FTIR) spectrometer. The original cross-section files have an uncertainty at 3 standard deviations, while the updated files (tagged V2) have an uncertainty at 2 standard deviations (consistent with the description in the published paper).

This dataset includes the infrared absorption cross-section measurements used in 'Measurements of infrared absorption cross-sections for four perfluoroalkanes from 298 to 350 K' by Ishtiak et al. (2024). The dataset includes (1) the absorption cross-sections for perfluoro-n-propane [n-C3F8], labeled as nPFC3. (2) the absorption cross-sections for perfluorocyclobutane [c-C4F8], labeled as cPFC4. (3) the absorption cross-sections for perfluoro-n-butane [n-C4F10], labeled as nPFC4. (4) the absorption cross-sections for perfluoro-n-pentane [n-C5F12], labeled as nPFC5. Nine absorption cross-sections are provided for each compound, labeled by the sample temperature from 298 to 350 K. All measurements were made using an ABB Bomem DA8 Fourier Transform InfraRed (FTIR) spectrometer. The original cross-section files have an uncertainty at 3 standard deviations, while the updated files (tagged V2) have an uncertainty at 2 standard deviations (consistent with the description in the published paper).

This dataset contains the measurements used in 'Exceptional Wildfire Enhancements of PAN, C2H4, CH3OH, and HCOOH Over the Canadian High Arctic During August 2017' by Wizenberg et al. (2023). It includes: (1) the 2006-2020 data for CO, PAN, C2H4, CH3OH and HCOOH retrieved from mid-IR spectra from the Bruker IFS 125HR FTIR located at the Polar Environment Atmospheric Research Laboratory (PEARL) in Eureka, Nunavut (80.05°N, 86.42°W), (2) the limited IASI dataset at the original sampling in the vicinity of Eureka for the same species, (3) the IASI data re-gridded to the 2°x2.5° GEOS-Chem model grid, and (4) the GFAS files with modified mean altitude of maximum injection (mami) values used to investigate the influence of injection height on the simulated wildfire plume transport.

Nineteen years of atmospheric composition measurements made at the University of Toronto Atmospheric Observatory (TAO, 43.66N, 79.40W, 174 m a.s.l.) are presented. These are retrieved from Fourier transform InfraRed (FTIR) solar absorption spectra recorded with an ABB Bomem DA8 spectrometer from May 2002 to December 2016. The retrievals have been optimized for fourteen species: O3, HCl, HF, HNO3, CH4, C2H6, CO, HCN, N2O, C2H2, H2CO, CH3OH, HCOOH and NH3 using the SFIT4 algorithm. The measurements have been archived in the Network for Detection of Atmospheric Composition Change (NDACC) database in Hierarchical Data Format version 4 (HDF4) files following the Generic Earth Observation Metadata Standard (GEOMS).

This dataset includes the absorption cross-section measurements used in 'Measurements of perfluoro-n-heptane and perfluoro-n-octane absorption cross-sections from 300 to 350 K' by Ishtiak et al. (2023a). The dataset includes (1) the absorption cross-sections for perfluoro-n-heptane [n-C7F16], labeled as PFC7. (2) the absorption cross-sections for perfluoro-n-octane [n-C8F18], labeled as PFC8. Nine absorption cross-sections are provided for each compound, labeled by the sample temperature from 300 to 350 K. All measurements were made using an ABB Bomem DA8 Fourier Transform InfraRed (FTIR) spectrometer. The original cross-section files have an uncertainty at 3 standard deviations, while the updated files (tagged V2) have an uncertainty at 2 standard deviations (consistent with the description in the published paper).

Retrieved profiles and partial columns of BrO and aerosol using PEARL-GBS MAX-DOAS measurements taken at the PEARL Ridge Lab in Eureka, Canada. Retrievals were performed on all available data in the springtime halogen activation season (March-May) for 2016-2019 using the HeiPro retrieval algorithm. The files also contain paired weather station measurements from the PEARL Ridge Lab, as well as integrated accumulation and coarse mode aerosol number concentrations from in situ aerosol measurements.

This dataset contains data from a number of instruments (and simulations from one model) in Eureka, Canada. The HDF files he contain measurements of HCl and NO2 from the Bruker FTIR (2016-2020), in the GEOMS file format. The HCl data can be found on the NDACC archive as well, and this version differs only in the data filter used (negative VMRs were included here). The CRL_* file contains range-scaled signal measured by the CANDAC Rayleigh-Mie-Raman Lidar for 16-21 March, 2020. Additional details in the file header. The GBS_* files contain BrO and OClO slant columns retrieved from UV Zenith-Sky DOAS measurements (2007-2020, spring data only). Additional details in the file header. The Pandora_* file contains ozone measurements from Pandora #144 (2019-2020, spring only). The ozone columns have been corrected for a temperature-dependent bias. Additional details in the file header. The tomcat_* files contain trace gas profiles over Eureka, simulated by the TOMCAT/SLIMCAT 3D chemical transport model (2000-2020). Additional details in tomcat_1QY_era5_eureka_README.txt