Fig. 4: Global changes in marine traffic during COVID-19.
From: Tracking the global reduction of marine traffic during the COVID-19 pandemic
a Changes in traffic density represented as a proportion of grid cells with increases and decreases per month and vessel category. b Changes in occupancy estimates, reflecting gains and reductions of the extent used by each vessel category per month. All estimates in (a) and (b) are based on a global grid of 0.25 degrees resolution, comparing between equivalent months (January–June) from 2020 and the reference year 2019.
