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The Cretaceous Thermal Maximum (CTM), also known as Cretaceous Thermal Optimum, was a period of climatic warming that reached its peak approximately 90 million years ago (90 Ma) during the Turonian age of the Late Cretaceous epoch. The CTM is notable for its dramatic increase in global temperatures characterized by high carbon dioxide levels.
A map of Earth as it appeared 105 million years ago during the Early Cretaceous Epoch. Chronology; ... driven by falling levels of atmospheric carbon dioxide, ...
During this period, global average temperature was about 10°C (50°F). higher and carbon dioxide (CO 2) levels were approximately 1000 parts per million (ppm), 2.5 times the current concentration in Earth's atmosphere. [2]
13,000 years ago: Unknown; may include climate changes, massive volcanic eruptions and Humans (largely by human overhunting) [4] [5] [6] Neogene: Pliocene–Pleistocene boundary extinction: 2 Ma: Possible causes include a supernova [7] [8] or the Eltanin impact [9] [10] Middle Miocene disruption: 14.5 Ma Climate change due to change of ocean ...
The Cenomanian-Turonian interval represents one of the hottest intervals of the entire Phanerozoic eon, [28] and it boasted the highest carbon dioxide concentrations of the Cretaceous period. [29] Even before OAE2, during the late Cenomanian, tropical sea surface temperatures (SSTs) were very warm, about 27-29 °C. [30]
Levels of carbon dioxide in the Earth’s atmosphere have soared to levels that are now more than 50% higher than in preindustrial times, scientists with the National Oceanic and Atmospheric ...
Despite the worldwide lockdown restrictions, carbon dioxide emissions increased to levels higher than the previous record from four million years ago.
The Late Cretaceous spans from 100 to 66 million years ago. The Late Cretaceous featured a cooling ... higher levels of carbon dioxide in the atmosphere are thought ...