THE CENOZOIC ERA is the most recent of the nine eras in geological time, and extends from 65 million years ago to the present. The Cenozoic Era catalogues extensive climate changes, ranging from hothouse climates with warm-temperate to sub-tropical forests near both the north and south poles, to icehouse climates with ice sheets kilometers thick covering much of the high latitudes in both hemispheres. The first 30 million years of the Cenozoic were the warmest of the era and were characterized by several extreme warmth events.

The first of these climate maxima is the Initial Eocene Thermal Maximum, which occurred approximately 55 million years ago. Geological evidence suggests that at this time, atmospheric CO2 concentrations soared to nearly 20 times current levels, and temperatures in the Arctic Ocean approached those of a comfortable swimming pool, approximately 68 degrees F (20 degrees C). This climate maximum persisted for 50,000—100,000 years, before the climate cooled and then continued a gradual warming trend through the longest period of sustained hothouse warmth in the Cenozoic, the Early Eocene Climatic Optimum.

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

Get My Free Ebook

Post a comment