The DeepMIP contribution to PMIP4: methodologies for selection, compilation and analysis of latest Paleocene and early Eocene climate proxy data, incorporating version 0.1 of the DeepMIP database

• Published in: Geoscientific Model Development 2019-07, Vol.12 (7), p.3149-3206
• Main Authors: Hollis, Christopher J, Dunkley Jones, Tom, Anagnostou, Eleni, Bijl, Peter K, Cramwinckel, Margot J, Cui, Ying, Dickens, Gerald R, Edgar, Kirsty M, Eley, Yvette, Evans, David, Foster, Gavin L, Frieling, Joost, Inglis, Gordon N, Kennedy, Elizabeth M, Kozdon, Reinhard, Lauretano, Vittoria, Lear, Caroline H, Littler, Kate, Lourens, Lucas, Meckler, A. Nele, Naafs, B. David A, Pälike, Heiko, Pancost, Richard D, Pearson, Paul N, Röhl, Ursula, Royer, Dana L, Salzmann, Ulrich, Schubert, Brian A, Seebeck, Hannu, Sluijs, Appy, Speijer, Robert P, Stassen, Peter, Tierney, Jessica, Tripati, Aradhna, Wade, Bridget, Westerhold, Thomas, Witkowski, Caitlyn, Zachos, James C, Zhang, Yi Ge, Huber, Matthew, Lunt, Daniel J
• Format: Article
• Language: English
• Subjects: Air pollution; Archives & records; Atmospheric chemistry; Atmospheric models; Carbon cycle; Carbon dioxide; Carbon dioxide atmospheric concentrations; Carbon dioxide concentration; Climate; Climate cycles; Climate models; Climatic analysis; Computer simulation; Data analysis; Datasets; Design of experiments; Earth; Eocene; Eocene climates; Evaluation; Experimental design; Global temperatures; Greenhouse effect; Greenhouse gases; Intercomparison; Isotopes; Mean temperatures; Methods; Palaeocene; Paleocene; Paleogene; Paleogene period; Proxies; Proxy; Temperature; Warm climates
• ISSN: 1991-9603; 1991-959X; 1991-962X; 1991-9603; 1991-962X
• DOI: 10.5194/gmd-12-3149-2019

The early Eocene (56 to 48 million years ago) is inferred to have been the most recent time that Earth's atmospheric CO2 concentrations exceeded 1000 ppm. Global mean temperatures were also substantially warmer than those of the present day. As such, the study of early Eocene climate provides insight into how a super-warm Earth system behaves and offers an opportunity to evaluate climate models under conditions of high greenhouse gas forcing. The Deep Time Model Intercomparison Project (DeepMIP) is a systematic model–model and model–data intercomparison of three early Paleogene time slices: latest Paleocene, Paleocene–Eocene thermal maximum (PETM) and early Eocene climatic optimum (EECO). A previous article outlined the model experimental design for climate model simulations. In this article, we outline the methodologies to be used for the compilation and analysis of climate proxy data, primarily proxies for temperature and CO2. This paper establishes the protocols for a concerted and coordinated effort to compile the climate proxy records across a wide geographic range. The resulting climate “atlas” will be used to constrain and evaluate climate models for the three selected time intervals and provide insights into the mechanisms that control these warm climate states. We provide version 0.1 of this database, in anticipation that this will be expanded in subsequent publications.