High Quality Content by WIKIPEDIA articles! The Subatlantic is the last climatic phase of the Holocene. It started at about 2500 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.