Last updated October 10, 2018

A search for human influences on the thermal structure of the atmosphere

  • States that the observed spatial patterns of temperature change in the free atmosphere from 1963 to 1987 are similar to those predicted by state-of-the-art climate models incorporating various combinations of changes in carbon dioxide, anthropogenic sulphate aerosol and stratospheric ozone concentrations
  • Finds that the degree of pattern similarity between models and observations increases through this period
  • Concludes that is likely that this trend is partially due to human activities, although many uncertainties remain, particularly relating to estimates of natural variability