1. This warming event is known as the Middle Eocene Climatic Optimum . 2. This is also the Holocene climatic optimum period. 3. The warm period during between 7000 3000 BCE is called the Holocene climatic optimum . 4. The Empire's greatest extent under Trajan coincided with the Roman climatic optimum . 5. A warm period, known as the Holocene climatic optimum , followed the ice age. 6. From 1860 onwards, the temperatures started to rise again and initiated the modern climatic optimum . 7. The Holocene climatic optimum ( HCO ) was a period of warming in which the global climate became warmer. 8. However, some authors have used the term " Holocene Climatic Optimum " to describe this earlier southern warm period as well. 9. Warming and drying during the Holocene climatic optimum began about 9, 000 years ago and affected the vegetation of the Southeast. 10. Warming and drying during the Holocene climatic optimum began about 9, 000 years ago and affected the vegetation of the southeast.
