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[citation needed] During the PETM, the global mean temperature seems to have risen by as much as 5–8 °C (9–14 °F) to an average temperature as high as 23 °C (73 °F), in contrast to the global average temperature of today at just under 15 °C (60 °F). Geologists and paleontologists think that during much of the Paleocene and early ...
A temperature gradient of ~0.4 °C per degree of latitude is proposed for North America across the K–Pg boundary. These data of terrestrial climates and ocean temperatures may have been caused by Deccan Traps volcanic gassing, leading to dramatic global climate change. This evidence shows that many of the species' extinctions at this time ...
The Cretaceous is characterized by warm global temperatures caused by the high amounts of carbon dioxide and possibly methane greenhouse gases in the atmosphere. This caused a lack of permanent ice coverage in the polar regions, though the carbon dioxide level dropped between 115 and 66 million years ago (mya), possibly allowing some permanent ice cover.
Royer et al. 2004 [33] found a climate sensitivity for the rest of the Phanerozoic which was calculated to be similar to today's modern range of values. The difference in global mean temperatures between a fully glacial Earth and an ice free Earth is estimated at 10 °C, though far larger changes would be observed at high latitudes and smaller ...
While North America’s record 134° F has stood for more than a century, Antarctica and Asia have set temperature records in the past decade. Graphic: Temperature records around the world Skip to ...
Late Cenomanian sea surface temperatures (SSTs) in the equatorial Atlantic Ocean were substantially warmer than today (~27-29 °C). [2] Turonian equatorial SSTs are conservatively estimated based on δ18O and high p CO 2 estimates to have been ~32 °C, but may have been as high as 36 °C. [ 10 ]
Pre-Boreal sharp rise in temperature over 50 years (B-S), precedes Boreal 8500–6900: Boreal (B-S), rising sea levels, forest replaces tundra in northern Europe 7500–3900: Neolithic Subpluvial/African humid period in North Africa, wet 7000–3000: Holocene climatic optimum, or Atlantic in northern Europe (B-S) 6200: 8.2-kiloyear event cold ...
According to the release, the animal was likely part of a group of flightless creatures which was able to diversify before most dinosaurs were killed off 66 million years ago. Show comments ...