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    Temporal Trends in Satellite-Derived Erythemal UVB and Implications for Ambient Sun Exposure Assessment

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    ijerph-14-00176-v2.pdf
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    Description:
    Final Published Version
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    Author
    Langston, Marvin
    Dennis, Leslie
    Lynch, Charles cc
    Roe, Denise
    Brown, Heidi
    Affiliation
    Univ Arizona, Dept Epidemiol & Biostat, Mel & Enid Zuckerman Coll Publ Hlth
    Issue Date
    2017-02-10
    Keywords
    ultraviolet radiation
    exposure assessment
    melanoma
    sun exposure
    
    Metadata
    Show full item record
    Publisher
    MDPI AG
    Citation
    Temporal Trends in Satellite-Derived Erythemal UVB and Implications for Ambient Sun Exposure Assessment 2017, 14 (2):176 International Journal of Environmental Research and Public Health
    Journal
    International Journal of Environmental Research and Public Health
    Rights
    This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Ultraviolet radiation (UVR) has been associated with various health outcomes, including skin cancers, vitamin D insufficiency, and multiple sclerosis. Measurement of UVR has been difficult, traditionally relying on subject recall. We investigated trends in satellite-derived UVB from 1978 to 2014 within the continental United States (US) to inform UVR exposure assessment and determine the potential magnitude of misclassification bias created by ignoring these trends. Monthly UVB data remotely sensed from various NASA satellites were used to investigate changes over time in the United States using linear regression with a harmonic function. Linear regression models for local geographic areas were used to make inferences across the entire study area using a global field significance test. Temporal trends were investigated across all years and separately for each satellite type due to documented differences in UVB estimation. UVB increased from 1978 to 2014 in 48% of local tests. The largest UVB increase was found in Western Nevada (0.145 kJ/m(2) per five-year increment), a total 30-year increase of 0.87 kJ/m(2). This largest change only represented 17% of total ambient exposure for an average January and 2% of an average July in Western Nevada. The observed trends represent cumulative UVB changes of less than a month, which are not relevant when attempting to estimate human exposure. The observation of small trends should be interpreted with caution due to measurement of satellite parameter inputs (ozone and climatological factors) that may impact derived satellite UVR nearly 20% compared to ground level sources. If the observed trends hold, satellite-derived UVB data may reasonably estimate ambient UVB exposures even for outcomes with long latency phases that predate the satellite record.
    Note
    Open access journal.
    ISSN
    1660-4601
    DOI
    10.3390/ijerph14020176
    Version
    Final published version
    Sponsors
    National Cancer Institute [R01CA118493]
    Additional Links
    http://www.mdpi.com/1660-4601/14/2/176
    ae974a485f413a2113503eed53cd6c53
    10.3390/ijerph14020176
    Scopus Count
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