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UV dose
levels ona 1 x1° grid for land areas of the world ranging from 70 degrees N to 60 degrees S
latitude. The radiative transfer model used in creating global maps incorporates ozone data from the
Total Ozone Mapping Spectrometer (TOMS) instrument made available from the National Aeronautics
and Space Administration (NASA) Goddard Space Flight Center (GSFC), cloud data from the
Carbon Dioxide Information Analysis Center (CDIAC) at Oak Ridge National Laboratory, and
RAND's 1° Xx 1° degree elevation dataset obtained via ftp from the National Center for Atmospheric
Research (NCAR). These data are incorporated along with aerosol and molecular scattering
parameters to estimate seasonally averaged and peak dose levels. The flexibility of the model allows
for these and other time averaged and instantaneous UV-B and UV-B + UV-A dose amounts to be
estimated for any day included in the duration of the TOMS ozone dataset (~1979-1993), or for any
location having total column ozone measurements. Zonally averaged trends in total column ozone and
vertical profile ozone loss are also incorporated to estimate future levels of biologically effective dose
amounts. Future activities in this area include incorporation of 1 km resolution elevation data from
EROS Data Center (EDC) and finer resolution cloud data from the International Satellite Cloud
Climatology Program (ISCCP) and/or the Real-Time Nephanalysis model (RTNEPH) provided by
the United States Air Force. Global datasets of biologically effective radiation can be used in a
variety of interdisciplinary applications that address the potential impact of UV exposure, including
skin cancer, cataract incidence, crop damage, and other marine and terrestrial ecosystem impacts.
References
Tobler, W., U. Deichmann, J. Gottsegen, and K. Maloy. The Global Demography Project. Technical
Report TR-95-6, National Center for Geographic Information and Analysis, University of
California-Santa Barbara, April 1995. 75 pp.
