anthropogenic

Human Contribution to More-intense Precipitation Extremes

In this Nature article the authors state that "human-induced increases in greenhouse gases have contributed to the observed intensification of heavy precipitation events found over approximately two-thirds of data-covered parts of Northern Hemisphere land areas. These results are based on a comparison of observed and multi-model simulated changes in extreme precipitation over the latter half of the twentieth century analysed with an optimal fingerprinting technique." A fee or subscription may be required to view this article from the Nature journal.

Sir David Attenborough: The Truth About Climate Change

This is a brief video (less than 3 minutes) describing how we distinguish human induced warming from natural forcings.