Publications by authors named "Laura L Haynes"
Article Synopsis
- The late Paleocene and early Eocene periods were marked by long-term global warming and short, abrupt warming events called hyperthermals, largely influenced by greenhouse gases but possibly affected by other factors like tectonics.
- Researchers analyzed data from planktic foraminifera to reconstruct sea surface temperatures and CO levels, focusing on key events such as the Paleocene-Eocene Thermal Maximum (PETM) and Eocene Thermal Maximum 2 (ETM-2).
- Findings indicate a strong connection between CO and temperature, with different carbon sources contributing to the CO increases during these periods, and the emissions from these events are comparable to future projections, highlighting their relevance to current climate change discussions.
The geological record encodes the relationship between climate and atmospheric carbon dioxide (CO) over long and short timescales, as well as potential drivers of evolutionary transitions. However, reconstructing CO 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 record spanning the past 66 million years.
View Article and Find Full Text PDFThe seawater carbon inventory at the Paleocene-Eocene Thermal Maximum.
Proc Natl Acad Sci U S A
September 2020
The Paleocene-Eocene Thermal Maximum (PETM) (55.6 Mya) was a geologically rapid carbon-release event that is considered the closest natural analog to anthropogenic CO emissions. Recent work has used boron-based proxies in planktic foraminifera to characterize the extent of surface-ocean acidification that occurred during the event.
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