Arctic sea ice thickness processed at UCL from CryoSat's SAR mode data:
Latest from Near Real Time Data
Final Precise Data
11-May-16: Further NRT updates are suspended until the next winter season in September 2016. CryoSat is
not able to measure sea ice thickness effectively during the Arctic
summer due to melt ponds in the sea ice which interfere with the radar
signal. The final complete maps from April
2016 will be shown in this NRT section:
Latest 5km Grid of 28-day Thickness : 3/4/16 - 30/4/16
Click in map for local and basin thickness time series
How is Sea Ice Thickness derived from CryoSat?
CryoSat uses a synthetic aperture radar to sample a much smaller footprint than previous satellite radar altimeters. This allows us to discriminate between sea ice floes and ocean leads with confidence which, in turn, means we can measure their shape.
From this, we can compute sea ice thickness and volume using independent measurements of the ice age, density, and snow loading.
This measurement technique works in autumn, winter and spring. In summer, melt ponds prevent us from estimating sea ice thickness