Ground Truth Trekking

Dark sky over open water

During the winter, you can tell where there's open water even if it's over the horizon because the sky is darker. In this view from a cliff you can see the effect - dark sky over the water, bright sky over the snowy ice. This is a direct illustration of the concept of albedo - the amount of light something reflects back. It's very relevant in the case of sea ice. Ice reflects sunlight back into space, whereas water absorbs a lot of light.

Download this image

Right-click on the size you want, and select "save link as..."

Image SizeFilesize
300 px17.4 KB
600 px60.7 KB
750 px89.9 KB
1600 px180.9 KB
Original4.1 MB

Embed this image

1) Select a size:

2) Cut and paste:


Creative Commons Attribution Non-Commercial

Attribution and Copyright info

By Ground Truth Trekking

Content on this page is available under a Creative Commons Attribution Non-Commercial license. For commercial uses please contact us.