A Slice of Glory (一片壮丽)

If you have ever seen a series of concentric rings of color near a mist or fog, you have likely seen a glory. This colorful optical phenomenon, bright red on the outside and blue toward the center, forms when water droplets scatter sunlight back toward a source of light.

image | left from https://www.nasa.gov/sites/default/files/thumbnails/image/guadalupe_amo_2018154_lrg.jpg 上图经过了压缩,原图有大约2.3 MB, 原图请访问 HERE . The picture above has been compressed. The original picture is about 2.3 MB and it’s HERE .

If you have ever seen a series of concentric rings of color near a mist or fog, you have likely seen a glory. This colorful optical phenomenon, bright red on the outside and blue toward the center, forms when water droplets scatter sunlight back toward a source of light.

如果你在靠近浓雾的地方看到过一系列的彩色圆环,你极有可能见识到了一种极其壮丽的景色。这种五光十色的光学现象,外侧是明亮的红色,向内直到中心则是蓝色,当小水滴把阳光折射回光源的时候就形成了这种现象。

These days, most people who fly regularly and spend time looking out the window have seen the circular feature around an aircraft’s shadow on the clouds. Astronauts flying on the space shuttles reported seeing circular glories from that look similar to what one might observe from an airplane.

这些天,那些定期飞行并花时间向窗外看的大部分人都看到了云层上在飞机阴影周围的圆环现象。航天飞机上的宇航员报告说,他们看到了美丽的透视圆环,就像人们从飞机上观察到的那样。

Polar-orbiting satellite sensors, such as the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra and Aqua satellites, get a somewhat different view. As MODIS scans Earth’s surface from an altitude of about 700 kilometers (400 miles), it makes swaths perpendicular to the path followed by the satellite. So an individual swath shows a horizontal cross-section through the glory circle, containing two colored areas. As a result, a glory in a natural-color satellite image from MODIS consists of two elongated, colorful bands parallel to the path of the satellite. The MODIS on the Terra satellite acquired this image of a glory near the eastern Pacific island of Guadalupe on June 3, 2018.

极地轨道卫星传感器,例如在Terra和Aqua卫星上的中分辨率成像光谱辐射计(MODIS)获得了一个不同的观察视角。当MODIS从700千米(400英里)的高空对地球表面进行扫描的时候,这个带状区域将垂直于卫星的飞行轨迹。因此,一个单独的条带显示了一个穿过壮丽圆环的水平的横界面,包含了两个带有颜色的区域。因此,这个来自MODIS的显示了壮丽圆环的自然色彩的卫星图像是由两个与卫星飞行轨迹平行的长而彩色的波段组成的。Terra上的MODIS于2018年06月03日在太平洋东部的Guadalupe岛附近获取到了这张壮丽的图像。 Credits: NASA Earth Observatory from https://www.nasa.gov/sites/default/files/thumbnails/image/guadalupe_amo_2018154.jpg 上图经过了压缩,原图有大约419.1 KB, 原图请访问 HERE. The picture above has been compressed. The original picture is about 419.1 KB and it’s HERE.

Another notable feature in this image are the swirling von Karman vortices visible between the glory. The alternating double row of vortices form in the wake of an obstacle—in this instance Guadalupe—as air masses get disturbed as they pass over this bump in the sea surface.

在这张图像上另一个值得注意的特征是在这两个壮丽圆环之间形成的旋转着的von Karman漩涡。这两排交替着的漩涡是在遇到障碍物后形成的–当气团在经过海洋表面并受到颠簸时,就会被扰乱,进而就形成了这样的漩涡。

More: NASA Earth Observatory Image Credit: NASA Earth Observatory image by Joshua Stevens, using MODIS data from LANCE/EOSDIS Rapid Response Caption: Adam Voiland Last Updated: June 27, 2018 Editor: Sarah Loff


声明: 本文中的图片和英文原文均来自NASA,由导航狗对原文进行翻译,译文仅供参考。 原文链接:https://www.nasa.gov/image-feature/a-slice-of-glory 原文标题:A Slice of Glory Manifesto: The picture in this article and the English original text are all from NASA, DaoHangGou translated the original text and translated for reference only. Original link: https://www.nasa.gov/image-feature/a-slice-of-glory Original title: A Slice of Glory

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