Otto-Bliesner, Bette L., Braconnot, Pascale, Harrison, Sandy P., Lunt, Daniel J., Abe-Ouchi, Ayako ORCID: 0000-0003-1745-5952, Albani, Samuel ORCID: 0000-0001-9736-5134, Bartlein, Patrick J. ORCID: 0000-0001-7657-5685, Capron, Emilie, Carlson, Anders E., Dutton, Andrea, Fischer, Hubertus ORCID: 0000-0002-2787-4221, Goelzer, Heiko ORCID: 0000-0002-5878-9599, Govin, Aline ORCID: 0000-0001-8512-5571, Haywood, Alan, Joos, Fortunat ORCID: 0000-0002-9483-6030, LeGrande, Allegra N., Lipscomb, William H., Lohmann, Gerrit ORCID: 0000-0003-2089-733X, Mahowald, Natalie ORCID: 0000-0002-2873-997X, Nehrbass-Ahles, Christoph ORCID: 0000-0002-4009-4633, Pausata, Francesco S. R., Peterschmitt, Jean-Yves, Phipps, Steven J., Renssen, Hans and Zhang, Qiong (2017). The PMIP4 contribution to CMIP6-Part 2: Two interglacials, scientific objective and experimental design for Holocene and Last Interglacial simulations. Geosci. Model Dev., 10 (11). S. 3979 - 4004. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1991-9603

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Abstract

Two interglacial epochs are included in the suite of Paleoclimate Modeling Intercomparison Project (PMIP4) simulations in the Coupled Model Intercomparison Project (CMIP6). The experimental protocols for simulations of the mid-Holocene (midHolocene, 6000 years before present) and the Last Interglacial (lig127k, 127 000 years before present) are described here. These equilibrium simulations are designed to examine the impact of changes in orbital forcing at times when atmospheric greenhouse gas levels were similar to those of the preindustrial period and the continental configurations were almost identical to modern ones. These simulations test our understanding of the interplay between radiative forcing and atmospheric circulation, and the connections among large-scale and regional climate changes giving rise to phenomena such as land-sea contrast and high-latitude amplification in temperature changes, and responses of the monsoons, as compared to today. They also provide an opportunity, through carefully designed additional sensitivity experiments, to quantify the strength of atmosphere, ocean, cryosphere, and land-surface feedbacks. Sensitivity experiments are proposed to investigate the role of freshwater forcing in triggering abrupt climate changes within interglacial epochs. These feedback experiments naturally lead to a focus on climate evolution during interglacial periods, which will be examined through transient experiments. Analyses of the sensitivity simulations will also focus on interactions between extratropical and tropical circulation, and the relationship between changes in mean climate state and climate variability on annual to multi-decadal timescales. The comparative abundance of paleoenvironmental data and of quantitative climate reconstructions for the Holocene and Last Interglacial make these two epochs ideal candidates for systematic evaluation of model performance, and such comparisons will shed new light on the importance of external feedbacks (e.g., vegetation, dust) and the ability of state-of-the-art models to simulate climate changes realistically.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Otto-Bliesner, Bette L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braconnot, PascaleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Harrison, Sandy P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lunt, Daniel J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Abe-Ouchi, AyakoUNSPECIFIEDorcid.org/0000-0003-1745-5952UNSPECIFIED
Albani, SamuelUNSPECIFIEDorcid.org/0000-0001-9736-5134UNSPECIFIED
Bartlein, Patrick J.UNSPECIFIEDorcid.org/0000-0001-7657-5685UNSPECIFIED
Capron, EmilieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carlson, Anders E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dutton, AndreaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fischer, HubertusUNSPECIFIEDorcid.org/0000-0002-2787-4221UNSPECIFIED
Goelzer, HeikoUNSPECIFIEDorcid.org/0000-0002-5878-9599UNSPECIFIED
Govin, AlineUNSPECIFIEDorcid.org/0000-0001-8512-5571UNSPECIFIED
Haywood, AlanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Joos, FortunatUNSPECIFIEDorcid.org/0000-0002-9483-6030UNSPECIFIED
LeGrande, Allegra N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lipscomb, William H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lohmann, GerritUNSPECIFIEDorcid.org/0000-0003-2089-733XUNSPECIFIED
Mahowald, NatalieUNSPECIFIEDorcid.org/0000-0002-2873-997XUNSPECIFIED
Nehrbass-Ahles, ChristophUNSPECIFIEDorcid.org/0000-0002-4009-4633UNSPECIFIED
Pausata, Francesco S. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Peterschmitt, Jean-YvesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phipps, Steven J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Renssen, HansUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhang, QiongUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-211414
DOI: 10.5194/gmd-10-3979-2017
Journal or Publication Title: Geosci. Model Dev.
Volume: 10
Number: 11
Page Range: S. 3979 - 4004
Date: 2017
Publisher: COPERNICUS GESELLSCHAFT MBH
Place of Publication: GOTTINGEN
ISSN: 1991-9603
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ANTARCTIC ICE-SHEET; ATMOSPHERIC NITROUS-OXIDE; GLACIAL LAKE AGASSIZ; CLIMATE-CHANGE; SYNERGISTIC FEEDBACKS; POLAR AMPLIFICATION; COUPLED SIMULATIONS; SOUTHERN GREENLAND; VEGETATION CHANGES; MONSOON RESPONSEMultiple languages
Geosciences, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/21141

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