Articles | Volume 19, issue 4
https://doi.org/10.5194/acp-19-2165-2019
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, Jun Wang, Lorena Castro García, Jing Zeng, Connor Dennhardt, Yang Liu, and Nickolay A. Krotkov

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Cited articles

Antón, M., Cachorro, V., Vilaplana, J., Toledano, C., Krotkov, N., Arola, A., Serrano, A., and Morena, B.: Comparison of UV irradiances from Aura/Ozone Monitoring Instrument (OMI) with Brewer measurements at El Arenosillo (Spain) – Part 1: Analysis of parameter influence, Atmos. Chem. Phys., 10, 5979–5989, https://doi.org/10.5194/acp-10-5979-2010, 2010. 
Arola, A., Kazadzis, S., Krotkov, N., Bais, A., Gröbner, J., and Herman, J. R.: Assessment of TOMS UV bias due to absorbing aerosols, J. Geophys. Res.-Atmos., 110, D23211, https://doi.org/10.1029/2005JD005913, 2005. 
Bernhard, G. and Seckmeyer, G.: Uncertainty of measurements of spectral solar UV irradiance, J. Geophys. Res.-Atmos., 104, 14321–14345, 1999. 
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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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