James Hansen和他的“全球变暖”预言

NASA's top climate scientist in 1988, Hansen warned the world on a record hot June day 30 years ago that global warming was here and worsening. In a scientific study that came out a couple months later, he even forecast how warm it would get, depending on emissions of heat-trapping gases.

Global warming was not what Hansen set out to study when he joined NASA in 1972. The Iowa native studied Venus — a planet with a runaway greenhouse-effect run — when he got interested in Earth's ozone hole. As he created computer simulations, he realized that "this planet was more interesting than Venus." And more important.

In his 1988 study, Hansen and colleagues used three different scenarios for emissions of heat-trapping gases — high, low and medium. Hansen and other scientists concentrated on the middle scenario.

见：

James Hansen wishes he wasn't so right about global warming

James Hansen wishes he wasn't so right about global warming

https://apnews.com/664cf2e917604adf90472daa35989ffb