The 'Great Dying': A Post Extinction Climate with 10-14 °C Warming and Lush Environments Collapsed
The Paleozoic era culminated 251.9 million years ago in the most severe mass extinction recorded in the geologic record. Known as the “great dying,” this event saw the loss of up to 96% of all marine species and around 70% of terrestrial species, including plants and insects.
The consensus view of scientists is that volcanic activity at the end of the Permian period, associated with the Siberian Traps Large Igneous Province, emitted massive quantities of greenhouse gases into the atmosphere over a short time interval. This caused a spike in global temperatures and a cascade of other deleterious environmental effects.
Here, the extinction event is evident as the abrupt disappearance of Glossopteris forest-mire ecosystems that had flourished in the region for millions of years. Data collected from eight sites in New South Wales and Queensland, Australia were combined with the results of climate models to assess the nature and pace of climate change before, during, and after the extinction event.
Credit: GSA
Because many areas of the globe experienced abrupt aridification in the wake of the “great dying,” results suggest that high-southern latitudes may have served as important refugia for moisture-loving terrestrial groups.
The article was published today in the Geological Society of America journal, Geology.
Pace, magnitude, and nature of terrestrial climate change through the End-Permian Extinction in southeastern Gondwana
T.D. Frank; C.R. Fielding; A.M.E. Winguth; K. Savatic; A. Tevyaw; C. Winguth; S. McLoughlin; V. Vajda; C. Mays; R. Nicoll; M. Bocking; J.L. Crowley
Corresponding author: Tracy Frank ([email protected]), University of Nebraska–Lincoln
URL: https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G48795.1/598763/Pace-magnitude-and-nature-of-terrestrial-climate
Contacts and sources:
Kea Giles
Geological Society of America
Source: http://www.ineffableisland.com/2021/05/the-great-dying-post-extinction-climate.html
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A few degrees warming would probably do the earth some good. Obviously if you chart a trending pattern out into infinity eventually it gets too hot. But that is alarmist at best and pointless at worst