- Liittynyt
- 19.10.2016
- Viestejä
- 4 715
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Toi Washington Postin artikkeli on maksumuurin takana. Olisi siitä saanut silti sen ekan kappaleen mukaan:
An ambitious effort to understand the Earth’s climate over the past 485 million years has revealed a history of wild shifts and far hotter temperatures than scientists previously realized — offering a reminder of how much change the planet has already endured and a warning about the unprecedented rate of warming caused by humans.
Mutta vaikka tuosta lisää:
New Study Charts How Earth’s Global Temperature Has Drastically Changed Over the Past 485 Million Years, Driven by Carbon Dioxide | Smithsonian Institution
A new study co-led by the Smithsonian and the University of Arizona offers the most detailed glimpse yet of how Earth’s surface temperature has changed over the past 485 million years. In a paper published today, Sept. 19, in the journal Science, a team of researchers, including paleobiologists...
“This research illustrates clearly that carbon dioxide is the dominant control on global temperatures across geological time,” said Jessica Tierney, a paleoclimatologist at the University of Arizona and a co-author of the new paper. “When CO2 is low, the temperature is cold; when CO2 is high, the temperature is warm.”
The findings also reveal that the Earth’s current GMST of 59 degrees Fahrenheit (15 degrees Celsius) is cooler than Earth has been over much of the Phanerozoic. But greenhouse gas emissions caused by anthropogenic climate change are currently warming the planet at a much faster rate than even the fastest warming events of the Phanerozoic. The speed of warming puts species and ecosystems around the world at risk and is causing a rapid rise in sea level. Some other episodes of rapid climate change during the Phanerozoic have sparked mass extinctions.


