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The PMIP4 Contribution to CMIP6-Part 4: Scientific Objectives and Experimental Design of the PMIP4-CMIP6 Last Glacial Maximum Experiments and PMIP4 Sensitivity Experiments
External Online Source: doi:10.5194/gmd-10-4035-2017
Author and Affiliation:
Kageyama, Masa(Institut Pierre-Simon Laplace (IPSL), Laboratoire des Sciences du Climat et de l’Environnement, France)
Albani, Samuel(Institut Pierre-Simon Laplace (IPSL), Laboratoire des Sciences du Climat et de l’Environnement, France)
Braconnot, Pascale(Institut Pierre-Simon Laplace (IPSL), Laboratoire des Sciences du Climat et de l’Environnement, France)
Harrison, Sandy P.(Reading Univ., Centre for Past Climate Change and School of Archaeology, Geography and Environmental Science (SAGES), United Kingdom)
Hopcroft, Peter O.(Bristol Univ., School of Geographical Sciences, United Kingdom)
Ivanovic, Ruza F.(Leeds Univ., School of Earth and Environment, United Kingdom)
Lambert, Fabrice(Pontifical Catholic Univ. of Chile, Dept. of Physical Geography, Santiago, Chile)
Marti, Olivier(Institut Pierre-Simon Laplace (IPSL), Laboratoire des Sciences du Climat et de l’Environnement, France)
Peltier, W. Richard(Toronto Univ., Dept. of Physics, Ontario, Canada)
Peterschmitt, Jean-Yves(Institut Pierre-Simon Laplace (IPSL), Laboratoire des Sciences du Climat et de l’Environnement, France) Show more authors
Abstract: The Last Glacial Maximum (LGM, 21,000 years ago) is one of the suite of paleoclimate simulations included in the current phase of the Coupled Model Intercomparison Project (CMIP6). It is an interval when insolation was similar to the present, but global ice volume was at a maximum, eustatic sea level was at or close to a minimum, greenhouse gas concentrations were lower, atmospheric aerosol loadings were higher than today, and vegetation and land-surface characteristics were different from today. The LGM has been a focus for the Paleoclimate Modelling Intercomparison Project (PMIP) since its inception, and thus many of the problems that might be associated with simulating such a radically different climate are well documented. The LGM state provides an ideal case study for evaluating climate model performance because the changes in forcing and temperature between the LGM and pre-industrial are of the same order of magnitude as those projected for the end of the 21st century. Thus, the CMIP6 LGM experiment could provide additional information that can be used to constrain estimates of climate sensitivity. The design of the Tier 1 LGM experiment (lgm) includes an assessment of uncertainties in boundary conditions, in particular through the use of different reconstructions of the ice sheets and of the change in dust forcing. Additional (Tier 2) sensitivity experiments have been designed to quantify feedbacks associated with land-surface changes and aerosol loadings, and to isolate the role of individual forcings. Model analysis and evaluation will capitalize on the relative abundance of paleoenvironmental observations and quantitative climate reconstructions already available for the LGM.
Publication Date: Nov 07, 2017
Document ID:
20180000964
(Acquired Feb 13, 2018)
Subject Category: METEOROLOGY AND CLIMATOLOGY
Report/Patent Number: GSFC-E-DAA-TN49083
Document Type: Journal Article
Publication Information: Geoscientific Model Development; p. 4035-4055; (ISSN 1991-9603 ); Volume 10; No. 11
Publisher Information: Copernicus Publications
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 21p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GLACIERS; CLIMATE MODELS; GREENHOUSE EFFECT; EXPERIMENT DESIGN; BOUNDARY CONDITIONS; AEROSOLS; SIMULATION; ICE; CLIMATE
Availability Source: Other Sources
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