Improvements to the accuracy of measurements of NO2 by zenith-sky visible spectrometers. II: Errors in zero using a more complete chemical model

Roscoe, H.K.; Charlton, A.J.; Fish, D.J.; Hill, J.G.T.. 2001 Improvements to the accuracy of measurements of NO2 by zenith-sky visible spectrometers. II: Errors in zero using a more complete chemical model. Journal of Quantitative Spectroscopy and Radiative Transfer, 68 (3). 337-349. 10.1016/S0022-4073(00)00058-3

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Abstract/Summary

Using a flexible chemical box model with full heterogeneous chemistry, intercepts of chemically modified Langley plots have been computed for the 5 years of zenith-sky NO2 data from Faraday in Antarctica (65°S). By using these intercepts as the effective amount in the reference spectrum, drifts in zero of total vertical NO2 were much reduced. The error in zero of total NO2 is plus/minus 0.03 x 10 15 from one year to another. This error is small enough to determine trends in midsummer and any variability in denoxification between midwinters. The technique also suggests a more sensitive method for determining N2O5 from zenith-sky NO2 data.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/S0022-4073(00)00058-3
Programmes:	BAS Programmes > Other Special Projects
ISSN:	0022-4073
NORA Subject Terms:	Chemistry
Date made live:	08 Nov 2012 11:07 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/20262

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