Uncertainties in satellite-derived estimates of surface UV doses

Martin, T.J.; Gardiner, B.G.; Seckmeyer, G.. 2000 Uncertainties in satellite-derived estimates of surface UV doses. Journal of Geophysical Research, 105 (D22). 27005-27011. 10.1029/2000JD900432

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Official URL: http://dx.doi.org/10.1029/2000JD900432

Abstract/Summary

Satellite-derived maps of surface UV irradiance are currently limited by their poorly assessed accuracy. Here we use an extensive data set of ground-based spectral measurements from two Alpine sites to examine the level of uncertainty expected in model results due to the time-limited nature of some satellite data. When the ozone column, cloud optical depth, and aerosol optical depth supplied to a radiative transfer model are fixed to a single noontime value, the root-mean-square difference between calculations and measurements of the erythemal daily dose is about 20%. The corresponding uncertainty in the monthly dose is less than 5%. The modeled results also show a systematic error that depends on cloud optical depth. The results suggest that satellite-derived maps of UV irradiance cannot be expected to produce accurate values of the daily dose if they rely on a single estimate of the cloud conditions but may be able to provide reasonable estimates of the monthly dose.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2000JD900432
Programmes:	BAS Programmes > Pre 2000 programme
ISSN:	0148-0227
Date made live:	30 Nov 2012 10:20 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/20662

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1029/2000JD900432

Programmes:

BAS Programmes > Pre 2000 programme

ISSN:

0148-0227

Date made live:

30 Nov 2012 10:20 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/20662