© Stan Celestian
美国,亚利桑那州,格伦代尔附近
纬度: 33° 33' 34'' N
经度: 112° 22' 44'' W
04 July 2004 1550 (当地时间)
图像P/S代码: P.12.2.3
图像I.D.: 5434
尘卷风(尘旋或沙旋)是一束沙尘颗粒从地面吹起,有时伴有细小杂物,呈涡旋柱状,轴向几乎垂直。在近地面空气很不稳定时,例如太阳炙烤土地,会产生尘旋。
图像描述中的链接将突出显示图像上的特征。将鼠标悬停在特征上以获取更多详细内容。
在近地面空气很不稳定时,例如太阳炙烤土地,会产生尘旋(尘卷风)。同样的条件还有利于产生下现蜃景,正如在美国内华达州布莱克罗克沙漠所摄的这张照片所见。
尘旋或沙旋(尘卷风)是一束沙尘颗粒从地面吹起,有时伴有细小杂物,呈涡旋柱状,高度各异,直径小,轴向几乎垂直。
蜃景是一种光学现象,由于空气层温度和密度有差异,导致折射率发生变化,光线穿过空气层发生弯曲产生蜃景。在下现蜃景中,远处物体的影像向下位移。注意此处部分山坡的倒像。
图像描述中的链接将突出显示图像上的特征。将鼠标悬停在特征上以获取更多详细内容。
This dust devil developed over barren fields during the dry season, and was moving towards the left of the picture. The rotating dust column is well-defined at the base but gradually weakens upwards until it nearly disappears at 2. The dust devil had formed under cloudless conditions with strong instability from intense surface heating. The instability decreased with height. Outside the rotating column a mass of dust at 3, 4 is raised nearly as high as the dust devil.
The photograph was taken about 120 kilometres ahead of a cold front which was advancing southwards from the Gulf of Mexico.
图像描述中的链接将突出显示图像上的特征。将鼠标悬停在特征上以获取更多详细内容。