ATom: Global Modeled and CAFS Measured Cloudy and Clear Sky Photolysis Rates,...

Hall, S. R., K. Ullmann, M. Prather, C. M. Flynn, L. Murray, A. M. Fiore, G. Correa, S. Strode, S. Steenrod, J. Lamarque, J. Guth, B. Josse, J. Flemming, V. Huijnen, N. L. Abraham, and A. Archibald (2019), ATom: Global Modeled and CAFS Measured Cloudy and Clear Sky Photolysis Rates, 2016, Ornl Daac, doi:10.3334/ORNLDAAC/1651.

This dataset provides the results from nine global chemistry-climate or chemistry-transport models that estimated gridded values of atmospheric photolytic rates (J values) for ozone (O3), designated J-O1D, and nitrogen dioxide (NO2), designated J-NO2, under cloudy and clear sky scenarios. Each model produced global 4-D fields (latitude by longitude by pressure for 24 hours) for one day in mid-August 2016 (nominally) of results from two simulations: first using their standard treatment of clouds (all sky or cloudy) and a second with clouds and aerosols removed (clear sky). Model resolution ranges from 0.5 to 2.5 degrees. Observed J-O1D and J-NO2 values from the first ATom deployment (29 July - 23 August 2016) were collected with the Charged-coupled device Actinic Flux Spectroradiometer (CAFS) instrument. The ATom CAFS measurements are 3-second averages along the flight path for selected remote areas over the tropical and northern Pacific Ocean. Both all-sky (cloudy) and synthesized clear-sky J values are provided. Additional data are included for clouds and ozone column plus other cloudy and clear sky parameters for the same remote areas of the tropical and northern Pacific Ocean. These auxiliary data are provided for use with included MATLAB scripts to reproduce the plots and analyses performed in the related publication by Hall et al. (2018). Note that while the analyses in the related publication were limited to the Pacific basin, the global model data are archived with this dataset.

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Tropospheric Composition Program (TCP)
ATom Data Sets