A study that compares observed changes in precipitation over land averaged across latitudinal bands with changes simulated by climate models finds that human activity has had a detectable influence on the latitudinal pattern of precipitation change. Such human-induced changes contributed to the increase in precipitation in the Northern Hemisphere mid-latitudes and the decrease in precipitation in the Northern Hemisphere tropics and subtropics that occurred over the twentieth century.
- Xuebin Zhang
- Francis W. Zwiers
- Toru Nozawa