Climate Change

NASA: Warming Climate Likely Means More Floods, Droughts

The Earth's wettest regions are likely to get wetter while the most arid will get drier due to warming of the atmosphere caused by increased levels of carbon dioxide, according to a new NASA analysis of more than a dozen climate models.

Scientists ran simulations of 14 different models, starting with CO2 concentrations at about 280 parts per million, which is similar to preindustrial levels but well below the 400 parts per million today. The amount of carbon dioxide was then bumped up by 1 percent per year, an increase that is consistent with a "business as usual" trajectory described by the U.N. Intergovernmental Panel on Climate Change, or IPCC, NASA says.