Toward a Cenozoic history of atmospheric CO 2

The geological record encodes the relationship between climate and atmospheric carbon dioxide (CO 2 ) over long and short timescales, as well as potential drivers of evolutionary transitions. However, reconstructing CO 2 beyond direct measurements requires the use of paleoproxies and herein lies the challenge, as proxies differ in their assumptions, degree of understanding, and even reconstructed values. In this study, we critically evaluated, categorized, and integrated available proxies to create a high-fidelity and transparently constructed atmospheric CO 2 record spanning the past 66 million years. This newly constructed record provides clearer evidence for higher Earth system sensitivity in the past and…

• NS
  National Science Foundation
• UR
  UK Research and Innovation
• SR
  Sight Research UK

  Awards: NE/P011381/1, NE/W009552/1, NE/X000567/1, NE/P019048/1, NE/I006427/1
• DF
  Deutsche Forschungsgemeinschaft
• NN
  National Natural Science Foundation of China
• V
  Vetenskapsrådet
• LE
  Lamont-Doherty Earth Observatory, Columbia University
• NE
  Natural Environment Research Council

  Awards: NE/P019048/1, NE/X000567/1, NE/P011381/1, NE/W009552/1, NE/I006427/1
• NC
  National Centers for Environmental Information