Trend analysis of greenhouse gases over Europe measured by a network of ground-based remote FTIR instruments

by T. Gardiner, a. Forbes, M. de Mazière, C. Vigouroux, E. Mahieu, P. Demoulin, V. Velazco, J. Notholt, T. Blumenstock, F. Hase, I. Kramer, R. Sussmann, W. Stremme, J. Mellqvist, a. Strandberg, K. Ellingsen, M. Gauss show all authors
Atmospheric Chemistry and Physics ()
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Abstract

This paper describes the statistical analysis of annual trends in\nlong term datasets of greenhouse gas measurements taken over ten\nor more years. The analysis technique employs a bootstrap resampling\nmethod to determine both the long-term and intra-annual variability\nof the datasets, together with the uncertainties on the trend values.\nThe method has been applied to data from a European network of ground-based\nsolar FTIR instruments to determine the trends in the tropospheric,\nstratospheric and total columns of ozone, nitrous oxide, carbon monoxide,\nmethane, ethane and HCFC-22. The suitability of the method has been\ndemonstrated through statistical validation of the technique, and\ncomparison with ground-based in-situ measurements and 3-D atmospheric\nmodels.

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