Articles | Volume 19, issue 4
Atmos. Chem. Phys., 19, 2165–2181, 2019
https://doi.org/10.5194/acp-19-2165-2019
Atmos. Chem. Phys., 19, 2165–2181, 2019
https://doi.org/10.5194/acp-19-2165-2019

Research article 19 Feb 2019

Research article | 19 Feb 2019

Surface erythemal UV irradiance in the continental United States derived from ground-based and OMI observations: quality assessment, trend analysis and sampling issues

Huanxin Zhang et al.

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Short summary
OMU-based surface erythemal UV irradiance is compared with ground observations in the United States from 2005 to 2017. We reveal that the assumption of constant atmospheric conditions between OMI overpass time and local solar noon time may not fully represent the real atmosphere and the peaks of surface UV are not always at local solar noon because of cloud effects. Future geostationary satellites (e.g., TEMPO) would reduce sampling bias and improve trend analysis of surface UV estimate.
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