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Testing the robustness of the anthropogenic climate change detection statements using different empirical models

Imbers, J.; Lopez, A.; Huntingford, C.; Allen, M.R.. 2013 Testing the robustness of the anthropogenic climate change detection statements using different empirical models. Journal of Geophysical Research - Atmospheres, 118 (8). 3192-3199. 10.1002/jgrd.50296

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Abstract/Summary

This paper aims to test the robustness of the detection and attribution of anthropogenic climate change using four different empirical models that were previously developed to explain the observed global mean temperature changes over the last few decades. These studies postulated that the main drivers of these changes included not only the usual natural forcings, such as solar and volcanic, and anthropogenic forcings, such as greenhouse gases and sulfates, but also other known Earth system oscillations such as El Niño Southern Oscillation (ENSO) or the Atlantic Multidecadal Oscillation (AMO). In this paper, we consider these signals, or forced responses, and test whether or not the anthropogenic signal can be robustly detected under different assumptions for the internal variability of the climate system. We assume that the internal variability of the global mean surface temperature can be described by simple stochastic models that explore a wide range of plausible temporal autocorrelations, ranging from short memory processes exemplified by an AR(1) model to long memory processes, represented by a fractional differenced model. In all instances, we conclude that human-induced changes to atmospheric gas composition is affecting global mean surface temperature changes

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/jgrd.50296
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 2 - Biogeochemistry and Climate System Processes > BGC - 2.4 - Develop model frameworks to predict future impact of environmental drivers ...
CEH Sections: Reynard
ISSN: 0148-0227
Additional Keywords: climate change, detection and attribution, internal climate variability
NORA Subject Terms: Meteorology and Climatology
Atmospheric Sciences
Data and Information
Date made live: 11 Mar 2014 12:12 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/505183

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