Nuvuk video camera 1 variance image
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes. The most recent image from camera 1 is shown here. Please note that it takes 10 minutes for the images to be posted, once they are collected by the solar-powered camera. Also note that if an old image is shown, the solar panels may not be getting enough sun and the camera system goes into power-saving mode.
This is a variance Image, showing the standard deviation of pixel intensity throughout the video frames. It's useful for determining how much variation or movement is occurring at a given location. [Larger version]
Learn more about how the USGS uses these images to study wave dynamics.