polynya over Maud Rise was visible in a beautiful clear MODIS image on 25 September. It is currently ~40,000 km 2 of open water in the middle of the Antarctic winter sea ice. This will be some impressive heat loss.
MODIS image of the polyna over Maud rise on 25 Sept 2017. The black is ~40,000km2 of open water.
This is the polynya in the SMMI Data for the same day.
Location of Maud Rise polynya 25 Sept 2017.
A while back
I calculated the heat loss through 2,000 km2 of open water in the Arctic as being ~600 GW. This is about 20 times as much open water…
As I said then, the heat loss is making the surface waters denser, so they sink away from the surface
More to come on this I expect.
Quick post on the
Maud Polynya in the Weddell Sea that I wrote about last week. This is the sea ice data 17 September 2017, and the polynya is both clear and large.
The location of the polynya over Maud Rise. Sea ice data from DMSP SMMI.
An enlargement of the polynya shows that it is practically open water.
The Weddell Sea polynya is an area of open water that sometimes appears in the Weddell Sea over a relatively shallow region called Maud Rise.
The Antarctic sea ice concentration 9 September 2017. The location of the polynya is marked and the original data come from the DMSP SMMI data set at the NSIDC.
In the latest satellite imagery from the DMSP satellite you can see the lower concentration sea ice as the darker blue colour. If you look at the
MODIS imagery for the same date you can clear see black which indicates open water in the pack ice.
The MODIS imagery mosaic of Antarctica from 7 September 2017 from the MODIS sensor on the Terra satellite. The pattern in the centre of the image is because high latitudes of Antarctica are still dark at this time in winter.