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Table 1 Data sources used in ATP residual kriging to downscale NASA UVEry in the U.S. (1998–2012)

From: Spatiotemporal exposure modeling of ambient erythemal ultraviolet radiation

Variable Unit Spatial resolution Temporal resolution Source
Outcome: UVEry grids mW/m2 Approx. 100 × 100 km Daily NASA TOMS/OMIa
Predictors
 Surface albedo 1 70 × 50 km Monthly MERRA
 Aerosol optical depth (AOD) 1 70 × 50 km Daily MERRA
 Cloud cover 1 70 × 50 km Daily MERRA
 Dew point °F 4 × 4 km Monthly PRISM
 Elevation m 10 × 10 m Updatedb USGS 3DEP
 Latitude km 1 × 1 km n/a Manually created
 Ozone Dobson 70 × 50 km Monthly MERRA
 Surface incoming shortwave flux (SIS) W/m2 70 × 50 km Monthly MERRA
 Sulfur dioxide (SO2) kg/m2 70 × 50 km Monthly MERRA
  1. Abbreviations: 3DEP 3D Elevation Program, MERRA Modern Era Retrospective Analysis for Research and Applications, NASA National Aeronautics and Space Administration, OMI Ozone Monitoring Instrument, PRISM Parameter elevation Regression on Independent Slopes Model, TOMS Total Ozone Mapping Spectrometer, USGS U.S. Geological Survey
  2. aFor the TOMS sensor, the following data products were downloaded corresponding to the Nimbus-7 and Earth Probe satellites: TOMSN7L3:Erythemal_timeAveraged and TOMSEPL3:Erythemal_timeAveraged. The following data product was downloaded from the OMI sensor (Aura satellite): OMUVBd:ErythemalDoseRate_timeAveraged
  3. bUSGS 3DEP data are continuously updated as new elevation sources are acquired. Data from August 2015 were acquired for this study