Sept. 2, 2011
by arctic io
Envisat's radar images reveal a high fragmentation of the sea ice. It seems the algorithms using microwave echo to generate concentration maps are not optimized for the current state of the 'ice pack'.
While ESA's satellite operates with a resolution of 30mx30m, the pixel size of the AMSR-E instrument is factor 200 lower. Compare out for example the North of the Laptev Sea.
Also interesting is how the different microwave echo approaches depend on the resolution to calculate sea ice extent.
The NSDIC prefers a low resolution instrument for historical reasons and sees the extent of 2011 currently ...
-> continue reading