` This is not a climate model or a prediction but actual observations of weather events and temperatures that have happened , '' he wrote in a Washington Post opinion piece meant to accompany the study . ` James Hansen argues that rising global temperatures are fueling an increase in extreme weather . Comment: Hansen , an activist , directs research at the NASA Goddard Institute for Space Studies .
James Hansen argues that rising global temperatures are fueling an increase in extreme weather . Comment: Hansen , an activist , directs research at the NASA Goddard Institute for Space Studies .