Atlantic (period)

Preceded by the Pleistocene
Holocene Epoch
Canopy of deciduous temperate forest, which spread to the north in the Atlantic Period.
ICS stages/ages (official) Greenlandian (11.7*–8.236* ka) Northgrippian (8.236–4.2† ka) Meghalayan (4.2 ka–present)
Blytt–Sernander stages/ages Preboreal (10.3†–9† ka) Boreal (9–7.5† ka) Atlantic (7.5–5† ka) Subboreal (5–2.5† ka) Subatlantic (2.5 ka–present) *Relative to year 2000 (b2k). †Relative to year 1950 (BP/Before "Present").
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The Atlantic in palaeoclimatology was the warmest and moistest Blytt–Sernander period, pollen zone and chronozone of Holocene northern Europe. The climate was generally warmer than today^{[citation needed]}. It was preceded by the Boreal, with a climate similar to today's, and was followed by the Subboreal, a transition to the modern. Because it was the warmest period of the Holocene, the Atlantic is often referenced more directly as the Holocene climatic optimum, or just climatic optimum.