outflow boundary(气象):指雷暴等强对流天气中,由下沉气流带到地面的冷空气向外扩散,与周围较暖空气相遇形成的边界/锋面状界线。它常伴随风向突变、阵风、气温下降,并可能触发新的对流发展。(也常被称为 gust front 阵风锋,但两者在使用上有时有细微侧重。)
/ˈaʊtˌfloʊ ˈbaʊnd(ə)ri/
An outflow boundary moved through the town and the wind suddenly picked up.
外流边界穿过城镇,风突然变大了。
As the outflow boundary collided with warm, humid air, new thunderstorms formed along the line on radar.
当外流边界与温暖潮湿的空气相撞时,雷达上显示沿着这条线生成了新的雷暴。
由 outflow(“向外流出”,此处指雷暴冷空气外流)+ boundary(“边界、界线”)构成。该术语在气象学中用来描述冷空气外流与环境气团之间的分界带,因其在雷暴演变与新对流触发中的作用而常被讨论。