250
Fig.9. Open waterfraction
computed using the expected
backscatter of wind-roughened
water as threshold. (ERS-1
images copyright ESA 1996)
11.2.4
Melt Onset/Freeze-Up
R.KwOK
The backscattering cross section of a Lagrangian cell is recorded at each time step. A
time series of back scattering cross section histograms of each cell is used to determine
the date of melt onset and freeze-up. The melt onset algorithm tracks the peak of the
histogram for cells with more than 50% multiyear ice. The detection criterion is when
Fig.9. Open waterfraction
computed using the expected
backscatter of wind-roughened
water as threshold. (ERS-1
images copyright ESA 1996)
11.2.4
Melt Onset/Freeze-Up
R.KwOK
The backscattering cross section of a Lagrangian cell is recorded at each time step. A
time series of back scattering cross section histograms of each cell is used to determine
the date of melt onset and freeze-up. The melt onset algorithm tracks the peak of the
histogram for cells with more than 50% multiyear ice. The detection criterion is when