Long time-series on ocean properties are rare for the surface
ocean and even more uncommon for 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.
The 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.
The IROC production focuses the main efforts
from ICES WGOH (González-Pola et.al. 2019)