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The webcam shows water at the North Pole. Clearly, there still is some ice underneath the water, as is evident from the stakes that have been put into the ice to indicate the depth of surface water.Surface water can build up as a result of melting as well as due to rain.
As the image on the right shows, the ice is getting very thin. In between the North Pole and Siberia, a wide corridor has developed where the ice is between zero and one meters thick.
Surface water could extend over this corridor, all the way to edge of the ice, in which case it effectively becomes part of open water.
The presence of water in areas close to the North Pole has been discussed in a number of earlier posts, such as this one.
The image below, from the Danish Meteorological Institute, gives some idea of the extent of the sea surface temperature anomalies that have been particularly prominent in the Kara Sea for some time.
Meanwhile, more water has appeared around Webcam2. Below are four later images, the top two images captured on July 24, 2013, the third one captured on July 25, 2013, while the bottom one was captured on July 26, 2013.
Note that the buoy associated with Webcam2, while originally positioned at the North Pole, has meanwhile moved away substantially from that location, as indicated by the image below, from http://imb.crrel.usace.army.mil/
 |  Ice thickness image run July 26, valid July 27, 2013 for scale, see image further above. Buoy data up to July 28, 2013, buoy position: 84.87 N, 4.29 W. |
On the animation above right, the track is shown against a sea ice thickness map, showing sea ice at webcam2's current position that is two meters thick.
So, while satellite images may indicate that the sea ice is still several meters thick in many locations, huge amounts of surface water may be present on top. The albedo of water is far lower than ice, so less sunlight is reflected back into space and a lot more heat is absorbed by the water, further accelerating the sea ice melt. This spells bad news for the remaining sea ice, since the melting season still has quite a bit of time to go.
Let's end with a video uploaded at youtube by climatecentral.org covering the period from April 16 to July 25, 2013.
Related posts
- Open Water In Areas Around North Pole (posted June 22, 2013)
- Watching methane over Arctic Ocean (posted July 20, 2013)
- Heat, Fires and Methane (posted July 20, 2013)
- High methane readings over Kara Sea (posted July 18, 2013)
- Methanetracker (posted July 9, 2013)
