Figure 2.14: Monthly Arctic
sea-ice extent anomalies, 1973 to 2000, relative to 1973 to 1996. The data are
a blend of updated Walsh (Walsh, 1978), Goddard Space Flight Center satellite
passive microwave (Scanning Multichannel Microwave Radiometer (SMMR) and Special
Sensor Microwave/Imager (SSM/I)) derived data (Cavalieri et al., 1997) and National
Centers for Environmental Prediction satellite passive microwave derived data
(Grumbine, 1996). Updated digitised ice data for the Great Lakes are also included
(Assel, 1983).
