Free Access
Fig. 12

Annual variation in the sporadic mass index (solid line) as derived using the CAMO influx camera. The dashed line is the mass index derived from the population index using the classical relation s = 1 + 2.3logr.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.