Long time-series of ocean properties are rare in the surface
ocean and even more uncommon in the deep ocean.
The North Atlantic region is unique in having a relatively
large number of locations where oceanographic data have
been collected repeatedly for multiple years or decades;
the longest records extend back more than a century.
ICES Report on Ocean Climate (IROC) combines decades
of ocean observations across the North Atlantic ICES
region to describe the current status of sea temperature
and salinity and atmospheric conditions, as well as
observed trends and recent variability.