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Understanding Ice Ages: New Paper Sheds Light on Carbon role

The last million years of Earth history have been characterized by frequent “glacial-interglacial cycles,” large swings in climate that are linked to the growing and shrinking of massive, continent-spanning ice sheets. These cycles are triggered by subtle oscillations in Earth’s orbit and rotation, but the orbital oscillations are too subtle to explain the large changes in climate.
“The cause of the ice ages is one of the great unsolved problems in the geosciences,” said Daniel Sigman, the Dusenbury Professor of Geological and Geophysical Sciences. “Explaining this dominant climate phenomenon will improve our ability to predict future climate change.”
In the 1970s, scientists discovered that the concentration of the atmospheric greenhouse gas carbon dioxide (CO ....

Gerald Haug , Daniel Sigman , Julia Gottschalk , Anjas Studer , Mareike Schmitt , Sergey Oleynik , Elisabeth Michel , Geraldh Haug , Laura Arnold , Danielm Sigman , Simone Moretti , Antarctic Ocean , Samuell Jaccard , Alfredo Mart , Geophysical Sciences , Max Planck Institute For Chemistry , Princeton University , Dusenbury Professor , Max Planck Institute , ஜெரால்ட் கட்டிப்பிடி , டேனியல் சிஃமன் , ஜூலியா கொதிடஸ்சல்க் , எலிசபெத் மைக்கேல் , லாரா அர்னால்ட் , சிமோன் மோரேத்தி , அண்டார்டிக் கடல் ,

What caused the ice ages? Tiny ocean fossils offer key evidence

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IMAGE: Since the discovery that atmospheric carbon dioxide (CO2) concentrations were lower during past ice ages, the cause has been a mystery. Now, Princeton geoscientists Danny Sigman and Ellen Ai (seen.
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Credit: Laura Pedrick
The last million years of Earth history have been characterized by frequent glacial-interglacial cycles, large swings in climate that are linked to the growing and shrinking of massive, continent-spanning ice sheets. These cycles are triggered by subtle oscillations in Earth s orbit and rotation, but the orbital oscillations are too subtle to explain the large changes in climate.
The cause of the ice ages is one of the great unsolved problems in the geosciences, said Daniel Sigman, the Dusenbury Professor of Geological and Geophysical Sciences. Explaining this dominant climate phenomenon will improve our ability to predict future climate change. ....

Anja Studer , Anjas Studer , Sergey Oleynik , Elisabeth Michel , Geraldh Haug , Laura Arnold , Danielm Sigman , Samuell Jaccard , Antarctic Ocean , Daniel Sigman , Francois Fripiat , Gerald Haug , Julia Gottschalk , Mareike Schmitt , Simone Moretti , Alfredo Mart , Geophysical Sciences , Princeton Department Of Geosciences , Princeton University , National Science Foundation , Environment At Princeton University , Global Research Fellowship , German Research Foundation , Max Planck Institute For Chemistry , Swiss National Science Foundation , Andlinger Center ,