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Thirty years ago, atmospheric scientists began to notice a worrisome trend. They knew that turbulence from storms increases in summer, when hotter and more humid air rises to form thunderheads. And they knew that clear-air turbulence increases in winter, when the temperature drops dramatically at the poles but not in the tropics. That temperature difference drives the jet stream, which creates turbulent eddies and wind shear as it rushes through slower bodies of air. But, on top of these seasonal swings, there seemed to be an over-all trend as well: Earth’s atmosphere was getting rougher.。heLLoword翻译官方下载对此有专业解读
Webb's sharper view also hints at possible jets from the central star. The dark lane and the way gas appears to push outward near the top of the nebula suggest an ejection that may be shaping the cloud's symmetry, a common feature when aging stars throw material in opposite directions.，更多细节参见一键获取谷歌浏览器下载