web analytics

Tag Archive: North Pole

How human noise affects ocean habitats | Kate Stafford

Sonar systems developed for the U.S. Navy to detect enemy submarines generates slow-rolling sound waves at around 235 decibels. For reference, the world’s loudest rock bands top out at only 130. These waves are able to travel for hundreds of kilometers under water and can retain intensity as far as 500 kilometers from their source. …

Continue reading »

NASAEarthObservatory: Landsat Goes Over The Top: A Long View of the Arctic

In the Arctic summer, there are days when the Sun never sets. This period of extended sunlight offers the chance to observe long expanses of Earth’s northern latitudes from space. On June 21, 2014—the summer solstice—the Operational Land Imager (OLI) on Landsat 8 acquired 52 individual scenes that were subsequently stitched together into one long …

Continue reading »

NASA: Arctic Sea Ice Reaches 2014 Minimum Extent

Sea ice acts as an air conditioner for the planet, reflecting energy from the sun. On September 17, the Arctic sea ice reached its minimum extent for 2014. At 1.94 million square miles (5.02 million square kilometers), it’s the sixth lowest extent of the satellite record. With warmer temperatures and thinner, less resilient ice, the …

Continue reading »

BBC: Polar Bear: Spy On The Ice

Gripping footage showing an intelligent polar bear carefully stalking a seal in the hope of making it his next meal. Narrated by David Tennant.