What is "subatlantic"

a. Subsidiary or secondary to the Atlantic Ocean.

The Subatlantic is the current climatic age of the Holocene epoch. It started at about 2,500 years BP and is still ongoing. Its average temperatures were slightly lower than during the preceding Subboreal and Atlantic. During its course the temperature underwent several oscillations which had a strong influence on fauna and flora and thus indirectly on the evolution of human civilisations. With intensifying industrialisation, human society started to stress the natural climatic cycles with increased greenhouse gas emissions.