A new study in Nature Geoscience explains a major feature of global precipitation, and shows how a current originating from the poles influences tropical rainfall in Africa and southern India.
Air pollution in the Northern Hemisphere in the mid-20th century cooled the upper half of the planet and pushed rain bands south, contributing to the prolonged and worsening drought in Africa’s Sahel region. Clean air legislation in the 1980s reversed the trend and the drought lessened.
Drops forming on the outside of your drink don’t just make the can slippery. Experiments show that in hot, humid weather, condensation heats a drink more than the surrounding air.
One of the most persistent biases in global climate models is due to poor simulation of cloud cover thousands of miles to the south.