The empirical / statistical methods develop statistical relationships that link the large - scale atmospheric variables with local / regional climate variables. (climatehotmap.org)
The researchers found that these different features showed strong statistical relationships, meaning that variation in societies across space and time could be captured by a single measure of social complexity. (sciencedaily.com)
They find that there is a robust statistical relationship between atmospheric CO2 and global mean temperature and that natural variability is unlikely to be an explanation for the observed temperature change of the past century. (ipcc.ch)