Climate model and proxy data constraints on ocean warming across the Paleocene-Eocene Thermal Maximum

Constraining the greenhouse gas forcing, climatic warming and estimates of climate sensitivity across ancient large transient warming events is a major challenge to the palaeoclimate research community. Here we provide a new compilation and synthesis of the available marine proxy temperature data ac...

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Bibliographic Details
Published in:Earth-Science Reviews
Main Authors: Dunkley Jones, Tom, Lunt, Daniel J., Schmidt, Daniela N., Ridgwell, Andy, Sluijs, Appy, Valdes, Paul J., Maslin, Mark
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
Paleocene
Eocene
PETM
Warming
Climate
SEA-SURFACE TEMPERATURE
SOUTHWEST PACIFIC-OCEAN
CALCITE-ARAGONITE SEAS
CORE-TOP CALIBRATION
PLANKTONIC-FORAMINIFERA
SEAWATER CHEMISTRY
HYDRATE DESTABILIZATION
CIRCULATION CHANGES
TETRAETHER LIPIDS
MEMBRANE-LIPIDS
Planktonic foraminifera
Online Access:https://hdl.handle.net/1983/d45964f2-f4c5-4200-a35e-ec421ac618a3
https://research-information.bris.ac.uk/en/publications/d45964f2-f4c5-4200-a35e-ec421ac618a3
https://doi.org/10.1016/j.earscirev.2013.07.004
https://research-information.bris.ac.uk/ws/files/34251488/1_s2.0_S0012825213001207_main.pdf
Description
Summary:Constraining the greenhouse gas forcing, climatic warming and estimates of climate sensitivity across ancient large transient warming events is a major challenge to the palaeoclimate research community. Here we provide a new compilation and synthesis of the available marine proxy temperature data across the largest of these hyperthermals, the Paleocene-Eocene Thermal Maximum (PETM). This includes the application of consistent temperature calibrations to all data, including the most recent set of calibrations for archaeal lipid-derived palaeothermometry. This compilation provides the basis for an informed discussion of the likely range of PETM warming, the biases present in the existing record and an initial assessment of the geographical pattern of PETM ocean warming. To aid interpretation of the geographic variability of the proxy-derived estimates of PETM warming, we present a comparison of this data with the patterns of warming produced by high pCO(2) simulations of Eocene climates using the Hadley Centre atmosphere-ocean general circulation model (AOGCM) HadCM3L On the basis of this comparison and taking into account the patterns of intermediate-water warming we estimate that the global mean surface temperature anomaly for the PETM is within the range of 4 to 5 degrees C. (C) 2013 Elsevier B.V. All rights reserved.

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