Comparison of GOME-2 UVA satellite data to ground-based spectroradiometer measurements at a subtropical site

Parisi, Alfio V. and Downs, Nathan and Turner, Joanna and King, Rachel (2017) Comparison of GOME-2 UVA satellite data to ground-based spectroradiometer measurements at a subtropical site. IEEE Transactions on Geoscience and Remote Sensing, 55 (6). pp. 3145-3149. ISSN 0196-2892

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The ultraviolet A (UVA) (315–400 nm) daily exposures and maximum daily irradiances from the Global Ozone Monitoring Experiment (GOME)-2 satellite have been compared over three years to the corresponding data from a ground-based spectroradiometer for a subtropical Southern Hemisphere site. This is one of the first such comparisons for the GOME-2 UVA waveband in the Southern Hemisphere. For the UVA daily exposures and the maximum daily irradiances, the comparisons were undertaken for all sky conditions and for cloud-free conditions. Under cloud-free conditions the R 2 of the fit regression line for the comparisons was 0.93 for the exposures and the irradiances. The influence of cloud reduced the R 2 values to 0.86 and 0.70 for the daily exposures and maximum irradiances, respectively. The relative root-mean-square error (rRMSE), mean absolute bias error (MABE), and mean bias error (MBE) for the maximum daily UVA irradiances on the cloud-free days were 0.08, 6.59 ± 7.32%, and −1.04 ± 9.83%, respectively. Similarly, for the daily UVA exposures on the cloud-free days, the rRMSE, MABE, and MBE were 0.10, 5.19 ± 6.42%, and −0.79 ± 8.24%, respectively. For the all-sky conditions, the corresponding values were 0.20, 15.23 ± 14.90%, and −0.79 ± 8.24% for the maximum daily irradiances and 0.19, 14.17 ± 14.56%, and −4.63 ± 20.60% for the daily exposures. In all studies of the influence of UVA on human health, this can complement ground-based measurements that provide the higher temporal and spatial resolution available only at a limited number of surface monitoring sites.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Second place winner, USQ Publication Excellence Awards for Journal Articles (April - June 2017). Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 15 Aug 2017 04:38
Last Modified: 24 Apr 2018 00:38
Uncontrolled Keywords: Global Ozone Monitoring Experiment-2 satellite; spectroradiometer; UVA
Fields of Research : 02 Physical Sciences > 0299 Other Physical Sciences > 029901 Biological Physics
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
Identification Number or DOI: 10.1109/TGRS.2017.2662714

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