An international study shows that global warming hyperthermic events Eocene (between 34 and 53 million years) had a longer short and a quicker recovery than previously thought. The researchers suggest that the exchange of carbon between the atmosphere and ocean influence events. The findings will help understand the global carbon cycle during extreme heat events.
During the Eocene there were six events hyperthermic "Global temperature climbs within a period of warm-alone, which had a shorter duration and a faster recovery than the maximum of the Paleocene-Eocene Thermal (PETM, for its acronym in English)," makes 53 million years, the most extreme case of global warming history.
Among the Paleocene-do between 53 and 65 million years, and the Eocene, the PETM caused a temperature rise of up to 7 ยบ C. Scientists attribute these climate changes to a massive release of greenhouse gases stored in carbon deposits in the ocean.
"has been compared with the current warming PETM caused global fossil fuel burning, the rapid start of the event and the release of large amounts of carbon dioxide into the atmosphere sedimentary sources, "says Philip Sexton, one of the authors of the study and researcher at the Open University ( UK).
The results, which are now published in the journal Nature, show that the differences between these events are due to ocean ventilation, ie carbon exchange that occurs between the atmosphere and the ocean.
"large quantities of CO2 is steadily released into the atmosphere by increased ventilation of the interior of the oceans", explains Philip Sexton, one of the authors of the study and researcher at the Open University (United Kingdom).
"When conditions permitted, the CO2 was taken up by the sea and allowed the rapid recovery of these events," he adds. In the case of the PETM, scientists believe that the natural carbon exhumation of a book caused a delay in redistribution between the ocean and atmosphere.
To reach their conclusions, the researchers recreated the climate of the Eocene sediments across the western tropical Atlantic, corresponding to the transition between the early and middle Eocene. The study findings will help to understand global carbon cycles in future events of extreme heat.
During the Eocene there were six events hyperthermic "Global temperature climbs within a period of warm-alone, which had a shorter duration and a faster recovery than the maximum of the Paleocene-Eocene Thermal (PETM, for its acronym in English)," makes 53 million years, the most extreme case of global warming history.
Among the Paleocene-do between 53 and 65 million years, and the Eocene, the PETM caused a temperature rise of up to 7 ยบ C. Scientists attribute these climate changes to a massive release of greenhouse gases stored in carbon deposits in the ocean.
"has been compared with the current warming PETM caused global fossil fuel burning, the rapid start of the event and the release of large amounts of carbon dioxide into the atmosphere sedimentary sources, "says Philip Sexton, one of the authors of the study and researcher at the Open University ( UK).
The results, which are now published in the journal Nature, show that the differences between these events are due to ocean ventilation, ie carbon exchange that occurs between the atmosphere and the ocean.
"large quantities of CO2 is steadily released into the atmosphere by increased ventilation of the interior of the oceans", explains Philip Sexton, one of the authors of the study and researcher at the Open University (United Kingdom).
"When conditions permitted, the CO2 was taken up by the sea and allowed the rapid recovery of these events," he adds. In the case of the PETM, scientists believe that the natural carbon exhumation of a book caused a delay in redistribution between the ocean and atmosphere.
To reach their conclusions, the researchers recreated the climate of the Eocene sediments across the western tropical Atlantic, corresponding to the transition between the early and middle Eocene. The study findings will help to understand global carbon cycles in future events of extreme heat.
Source: noticiasdelaciencia.com / Photo: SINC
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