Fig. 3: Monthly mean time series of sea ice properties at the Fram Strait section for 1990–2018.
From: Unprecedented decline of Arctic sea ice outflow in 2018

a Ice thickness, b southward ice drift speed, and c southward ice volume transport. Estimates from different data sources are shown in different color. Annual mean values are calculated from averages from October of preceding year to September of the year to represent the seasonal cycles of sea ice formation and melt. See method section for detail. AWI CS2smos product is used in the thickness time series in a and southward volume transport in c.