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Daily 8-Hour Maximum and Annual O3 Concentrations for the Contiguous United States, 1-km Grids, Version 1.10 (2000-2016)

Metadata Updated: February 7, 2024

The Daily 8-Hour Maximum and Annual O3 Concentrations for the Contiguous United States, 1-km Grids, Version 1.10 (2000-2016) data set contains estimates of ozone concentrations at a high resolution spatially (1-km grid cells) and temporally (daily) for the years 2000 to 2016. These predictions incorporated various predictor variables such as Ozone (O3) ground measurements from the U.S. Environmental Protection Agency (EPA) Air Quality System (AQS) monitoring data, land-use variables, meteorological variables, chemical transport models and remote sensing data, along with other data sources. After imputing missing data with machine learning algorithms, a geographically-weighted ensemble model was applied that combined estimates from three types of machine learners (neural network, random forest, and gradient boosting). The annual predictions were computed by averaging the daily 8-hour maximum predictions in each year for each grid cell. The results demonstrate high overall model performance with a cross-validated R-squared value against daily observations of 0.90 and 0.86 for annual averages. In version 1.10, we have enhanced the completeness of daily O3 predictions by employing linear interpolation to impute missing values. Specifically, for days with small spatial patches of missing data with less than 100 grid cells, we used inverse distance weighting interpolation to fill the missing grid cells. Other missing daily O3 predictions were interpolated from the nearest days with available data. Annual predictions were updated by averaging the imputed daily predictions for each year in each grid cell. These daily 8-hour maximum and annual O3 predictions allow public health researchers to respectively estimate the short- and long-term effects of O3 exposures on human health, supporting the U.S. EPA for the revision of the National Ambient Air Quality Standards for O3. The data are available in RDS and GeoTIFF formats for statistical research and geospatial analysis.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date February 7, 2024
Metadata Updated Date February 7, 2024

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Sample browse graphic of the data set.

Additional Metadata

Resource Type Dataset
Metadata Created Date February 7, 2024
Metadata Updated Date February 7, 2024
Publisher SEDAC
Maintainer
Identifier C2848642408-SEDAC
Data First Published 2024-01-30
Language en-US
Data Last Modified 2024-01-30
Category AQDH, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Requia, W. J., Y. Wei, A. Shtein, X. Xing, E. Castro, Q. Di, R. Silvern, J. T. Kelly, P. Koutrakis, L. J. Mickley, M. P. Sulprizio, H. Amini, C. Hultquist, L. Shi, Y. Daouk, and J. Schwartz. 2024-01-30. Daily 8-Hour Maximum and Annual O3 Concentrations for the Contiguous United States, 1-km Grids, Version 1.10 (2000-2016). Version 1.10. Palisades, NY. Archived by National Aeronautics and Space Administration, U.S. Government, NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/10.7927/5tht-jg22. https://doi.org/10.7927/5tht-jg22.
Creator Requia, W. J., Y. Wei, A. Shtein, X. Xing, E. Castro, Q. Di, R. Silvern, J. T. Kelly, P. Koutrakis, L. J. Mickley, M. P. Sulprizio, H. Amini, C. Hultquist, L. Shi, Y. Daouk, and J. Schwartz
Graphic Preview Description Sample browse graphic of the data set.
Graphic Preview File https://sedac.ciesin.columbia.edu/downloads/maps/aqdh/aqdh-o3-concentrations-contiguous-us-1-km-v1-10-2000-2016/sedac-logo.jpg
Harvest Object Id e4a6c2b9-9db8-45f7-b922-808c80b30f74
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.7927/10.7927/5tht-jg22
Metadata Type geospatial
Old Spatial -180.0 17.0 -65.0 72.0
Program Code 026:001
Release Place Palisades, NY
Source Datajson Identifier True
Source Hash 368ac2cadae3a6c9ea45017666b9d5f47f760fc138a586e65af43bfa68af5e9b
Source Schema Version 1.1
Spatial
Temporal 2000-01-01T00:00:00Z/2016-12-31T00:00:00Z

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