Fig. 2: Decadal trends in melt indices over coastal West Antarctica.

Trends in (left column, a, c) melt days (nmlt) based on passive microwave satellite measurements, and (right column, b, d) melt potential frequency (MPf) based on regional atmospheric model output, during (top panel) austral summer from 1979 to 1998 and (bottom panel) austral summer from 1999 to 2018. Areas with statistically significant trends (at 90% level) are shown with green contours.