Open Water Formation Efficiency (OWFE) is a measure of the ease with which melt season thinning of sea-ice reveals open water. In March I published a post looking at how this operates from a theoretical perspective. In this post I look at how it operates in practice in various regions of the Arctic Ocean.
Strictly speaking OWFE is the relationship between peak sea-ice thickness in March and the percentage of open water per cm of thinning over the Spring and Summer, originally defined in Holland et al "Future abrupt reductions in the summer Arctic sea ice". Their figure 2b is shown below.