据美国航空航天局(NASA)卫星研究员史蒂文·普拉特尼克表示,有些云可以降低地表温度,但还有一些云可以帮助地表保持温度——部分取决于云在我们大气层中的高度。普拉特尼克在研究云以及云与地球气候的关系。他说,大体来说,那种较低的、蓬松的云会让我们感觉凉爽。史蒂文·普拉特尼克:如果你在一个炎热的晴天走出门外,一片低矮的云从头 According to NASA satellite researcher Steven Pratnik, some clouds can reduce surface temperatures, but there are other clouds that can help keep the surface warm-in part because of how high the cloud is in our atmosphere. Pratnik is studying clouds and the relationship between the clouds and the earth’s climate. In general, he said, the lower, fluffy clouds make us feel cool. Steven Pratnik: If you go out on a hot sunny day, a low cloud from scratch