Estimates of the spatial extent of ice surface melt across the Greenland ice (GrIS sheet) during the pe-riod 1979–2016 are derived from brightness tempera-tures measured by the Special Sensor Microwave Im-ager (SSMI) and the SSMI/Sounder (SSMIS) passive microwave radiometers (e.g., Mote 2007; Tedesco et al. 2013). These observations indicate that 2016 extended the overall increasing melting trend, although it was not a record-breaking year in terms of melt extent and duration. The updated trend for melt extent over the entire Greenland ice sheet for the period 1979–2016 is +15 800 ± 2300 km2 yr−1.
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- Programområde 5: Natur og klima