这个图片专辑通过不同时期图像的对比显示气候变化造成的影响。

为纪念4月22日“地球日”，荣获“威比奖” (Webby Award)的美国国家航空航天局（NASA）全球气候变化网站公布了广受欢迎的新版图片专辑《星球迭变》（State of Flux）。这组图片专辑见以下网址 http://climate.nasa.gov/sof。它提供了一些大多来自太空的令人惊叹的图像，按照年代记录了从几天到几个世纪各时间段地球不断演变的过程。

图为阿拉斯加州的彼特森冰川（ Pedersen Glacier）退缩的情况。左图摄于1917年夏；右图摄于2005 年夏。

这个图片专辑经常增添新的内容，通过不同时期图像的对比显示气候变化造成的影响，其中包括森林火灾和洪水等极端事件造成的破坏，气候变化引起的冰川消融和人口增长导致城市面积的不断扩大。

有关NASA地球日活动的详情见http://www.nasa.gov/earthday。

NASA has unveiled a new version of its popular image gallery “State of Flux.”

In celebration of Earth Day on April 22, NASA’s Webby Award–winning Global Climate Change website has unveiled a new version of its popular image gallery, “State of Flux.” The gallery, which can be found at http://climate.nasa.gov/sof, presents stunning images, mostly from space, of our ever-changing planet, chronicling changes taking place over time periods ranging from days to centuries.

The images above show the retreat of Pedersen Glacier in Alaska. The photo on the left was taken in summer 1917; the photo on the right was taken in summer 2005.

Each image pair in the continuously updated gallery highlights before-and-after impacts of change, including the destruction wrought by extreme events such as wildfires and floods, the retreat of glaciers caused by climate change, and the expanding footprint of urban areas due to population growth.

For more on NASA’s Earth Day activities, visit http://www.nasa.gov/earthday.