Supporting data repository for "Data fusion for fine-scale ozone mapping in the New York City metropolitan area using low-cost sensors and model information"

Supporting data repository for "Data fusion for fine-scale ozone mapping in the New York City metropolitan area using low-cost sensors and model information" by Hojeily et al. (2026) published in Atmospheric Environment. Repository created and managed by Ellie Hojeily (ehojeily@albany.edu), last updated: 23 January 2026. Important! The New York State Mesonet (NYSM) observed low-cost sensor data must be retrieved from the NYSM website (https://www2.nysmesonet.org/) following acceptance of a data use agreement. As such, the NYSM low-cost sensor observations are omitted from files in this repository. Please contact Ellie with questions or if additional data are required. Additionally, NYSM meteorological data can be requested from the Mesonet website (https://nysmesonet.org/about/data). The following files are available to download from this repository: airnow_results.csv - results for the bias correction on the AirNow sites within the model domain. nysm_testing_results.csv - results for the bias correction on the NYSM testing sites. Note that the observed O3 values are omitted in this file. Please reach out directly or retrieve data from the NYSM if these data are needed. queens_college_results.csv - results for the Queens College NYSDEC site. sample_wrf.zip - sample output from Wx-AQ/WRF-Chem model, data for the July 1 2024 are provided due to file size restrictions. If you would like the full week of data to use with the sample_bc.zip, please reach out and it can be provided. These files include all forecast fields from WRF. The files will start with 'NYSM_merged' indicating they are bias corrected files. sample_bc.zip - sample gridded dataset using the NYSM and AirNow testing sites for bias correction, hourly gridded data for the first week of July are provided. The sedi output variable in the WRF files is 'wrf_pm25_m' since the original SEDI code was designed for PM, these variables are however surface O3 in ppm. Reach out if assistance is needed. Please note that this file is 1.2 gb. For additional data, please contact Ellie Hojeily (ehojeily@albany.edu) Metadata. All .csv files are structured similarly using the following column names: Column/Header Name Explanation site (site.1) Site name, for the NYSM sites, this is a short identifier (4 letters for standard sites, 6 for Micronet sites) lat Latitude in degrees. The latitude values have been rounded to 3 decimal places. More detailed lat/lon information can be found from AirNow and the NYSM. lon Longitude in degrees. The longitude values have been rounded to 3 decimal places. More detailed lat/lon information can be found from AirNow and the NYSM. O3 Observed ozone in ppb (omitted in nysm_testing_results.csv) Source Source of observed data (NYSM, AirNow) wxaq-O3 WRF predicted ozone in ppb sedi-O3 Bias corrected ozone in ppb datetime Datetime in UTC Period Indicates if the site was used to Train or Test the BC. Run Indicates what bias correction was used (nysm_only, airnow_only, nysm_airnow)