Of course, for the cretins here, this article means nothing, having been written by scientists rather than an obese junkie on the radio.
http://iopscience.iop.org/1748-9326/6/4/044025/pdf/1748-9326_6_4_044025.pdf
Abstract
Attributing observed climate change to causes is challenging. This letter communicates the
physical arguments used in attribution, and the statistical methods applied to explore to what
extent different possible causes can be used to explain the recent climate records. The methods
use fingerprints of climate change that are identified on the basis of the physics governing our
climate system, and through the use of climate model experiments. These fingerprints
characterize the geographical and vertical pattern of the expected changes caused by external
influences, for example, greenhouse gas increases and changes in solar radiation, taking also
into account how these forcings and their effects vary over time. These time–space fingerprints
can be used to discriminate between observed climate changes caused by different external
factors. Attribution assessments necessarily take the natural variability of the climate system
into account as well, evaluating whether an observed change can be explained in terms of this
internal variability alone, and estimating the contribution of this source of variability to the
observed change. Hence the assessment that a large part of the observed recent warming is
anthropogenic is based on a rigorous quantitative analysis of these joint drivers and their
effects, and proceeds through a much more comprehensive and layered analysis than a
comparison at face value of model simulations with observations.
Complete text at site