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This map shows global PM 2.5 (particulate matter) concentrations in 2016. This is shown by countries, administrative 1 boundaries, and 50km hex bins. The data is derived from NASA SEDAC's gridded PM 2.5 rasters. A brief summary of the item is not available. Add a brief summary about the item.

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Item created: Feb 13, 2023 Item updated: Feb 13, 2023 View count: 147

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This map shows particulate matter in the air sized 2.5 micrometers of smaller (PM 2.5) by country boundaries, administrative 1 boundaries, and 50 km hex bins. The unit of measurement is micrograms per cubic meter.

The layer shows the annual average PM 2.5 in 2016, highlighting if the overall mean for an area meets the World Health Organization guideline of 10 micrograms per cubic meter annuallyAreas that don't meet the guideline and are above the threshold are shown in red, and areas that are lower than the guideline are in grey.

PM 2.5 is fine particulate matter that is 2.5 microns or less in diameter. These particles can cause the air to be hazy, and can get into human lungs and the bloodstream causing major health concerns. To learn more about PM 2.5 and its global/human impacts, visit this World Health Organization page about ambient air pollution.

The PM 2.5 data in this map is aggregated from NASA Socioeconomic Data and Applications Center (SEDAC) gridded data into country boundaries, administrative 1 boundaries, and 50 km hex bins. The unit of measurement for PM 2.5 concentrations is micrograms per cubic meter. For full metadata and methodology documentation about the layer used in this map, visit this Living Atlas layer. For metadata and methodology about the data used to generate the layer, visit the NASA SEDAC gridded PM 2.5 documentation page or PDF.

To learn the techniques used in the analysis that generated this layer, visit the Learn ArcGIS lesson Investigate Pollution Patterns with Space-Time Analysis by Esri's Kevin Bulter and Lynne Buie. 

Citations:
van Donkelaar, A., R. V. Martin, M. Brauer, N. C. Hsu, R. A. Kahn, R. C. Levy, A. Lyapustin, A. M. Sayer, and D. M. Winker. 2018. Global Annual PM2.5 Grids from MODIS, MISR and SeaWiFS Aerosol Optical Depth (AOD) with GWR, 1998-2016. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/H4ZK5DQS. Accessed 1 April 2020

van Donkelaar, A., R. V. Martin, M. Brauer, N. C. Hsu, R. A. Kahn, R. C. Levy, A. Lyapustin, A. M. Sayer, and D. M. Winker. 2016. Global Estimates of Fine Particulate Matter Using a Combined Geophysical-Statistical Method with Information from Satellites. Environmental Science & Technology 50 (7): 3762-3772. https://doi.org/10.1021/acs.est.5b05833.

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          NASA Socioeconomic Data and Applications Center (SEDAC), Kevin Butler (Esri), Garmin, Facebook, CIA, World Health Organization (WHO)

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