The penultimate deglaciation: protocol for Paleoclimate Modelling Intercomparison Project (PMIP) phase 4 transient numerical simulations between 140 and 127 ka, version 1.0
LAST GLACIAL MAXIMUM
; MERIDIONAL OVERTURNING CIRCULATION
; NORTH-ATLANTIC OCEAN
; MILLENNIAL-SCALE VARIABILITY
; SEA-SURFACE TEMPERATURE
; LARGE ENSEMBLE ANALYSIS
; HEMISPHERE ICE SHEETS
; MELTWATER PULSE 1A
; ANTARCTIC ICE
; CLIMATE VARIABILITY
WOS学科分类:
Geosciences, Multidisciplinary
WOS研究方向:
Geology
英文摘要:
The penultimate deglaciation (PDG, similar to 138-128 thousand years before present, hereafter ka) is the transition from the penultimate glacial maximum (PGM) to the Last Interglacial (LIG, similar to 129-116 ka). The LIG stands out as one of the warmest interglacials of the last 800 000 years (hereafter kyr), with high-latitude temperature warmer than today and global sea level likely higher by at least 6 m. Considering the transient nature of the Earth system, the LIG climate and ice-sheet evolution were certainly influenced by the changes occurring during the penultimate deglaciation. It is thus important to investigate, with coupled atmosphere-ocean general circulation models (AOGCMs), the climate and environmental response to the large changes in boundary conditions (i.e. orbital configuration, atmospheric greenhouse gas concentrations, ice-sheet geometry and associated meltwater fluxes) occurring during the penultimate deglaciation.
A deglaciation working group has recently been set up as part of the Paleoclimate Modelling Intercomparison Project (PMIP) phase 4, with a protocol to perform transient simulations of the last deglaciation (19-11 ka; although the protocol covers 26-0 ka). Similar to the last deglaciation, the disintegration of continental ice sheets during the penultimate deglaciation led to significant changes in the oceanic circulation during Heinrich Stadial 11 (similar to 136-129 ka). However, the two deglaciations bear significant differences in magnitude and temporal evolution of climate and environmental changes.
Here, as part of the Past Global Changes (PAGES)-PMIP working group on Quaternary interglacials (QUIGS), we propose a protocol to perform transient simulations of the penultimate deglaciation under the auspices of PMIP4. This design includes time-varying changes in orbital forcing, greenhouse gas concentrations, continental ice sheets as well as freshwater input from the disintegration of continental ice sheets. This experiment is designed for AOGCMs to assess the coupled response of the climate system to all forcings. Additional sensitivity experiments are proposed to evaluate the response to each forcing. Finally, a selection of paleo-records representing different parts of the climate system is presented, providing an appropriate benchmark for upcoming model-data comparisons across the penultimate deglaciation.
1.Univ New South Wales, Climate Change Res Ctr, PANGEA, Sydney, NSW, Australia 2.Univ Copenhagen, Niels Bohr Inst, Phys Ice Climate & Earth, Tagensvej 8, DK-2100 Copenhagen, Denmark 3.British Antarctic Survey, Madingley Rd, Cambridge CB3 0ET, England 4.Univ Paris Saclay, IPSL, LSCE, CEA,CNRS,UVSQ, F-91190 Gif Sur Yvette, France 5.Univ Florida, Dept Geol Sci, POB 112120, Gainesville, FL 32611 USA 6.Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St John, NF, Canada 7.Univ Tokyo, Atmosphere & Ocean Res Inst, Tokyo, Japan 8.Univ Melbourne, Sch Geog, Melbourne, Vic, Australia 9.Univ Savoie Mt Blanc, Lab EDYTEM, CNRS, UMR 5204, F-73376 Le Bourget Du Lac, France 10.Univ Cambridge, Scott Polar Res Inst, Cambridge CB2 1ER, England 11.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England 12.Univ Wisconsin Madison, Nelson Inst Environm Studies, Ctr Climat Res, Madison, WI 53706 USA 13.Res Org Informat & Syst, Natl Inst Polar Res, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan 14.Grad Univ Adv Studies SOKENDAI, Dept Polar Sci, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan 15.Japan Agcy Marine Earth Sci & Technol, Inst Biogeosci, 2-15 Natsushima Cho, Yokosuka, Kanagawa 2370061, Japan 16.NCAR, Climate & Global Dynam Lab, Boulder, CO 80305 USA 17.UCL, Dept Geog, Environm Change Res Ctr, London, England 18.Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England 19.Alfred Wegener Inst, Helmholtz Ctr Polar & Marine Res, D-27570 Bremerhaven, Germany 20.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation:
Menviel, Laurie,Capron, Emilie,Govin, Aline,et al. The penultimate deglaciation: protocol for Paleoclimate Modelling Intercomparison Project (PMIP) phase 4 transient numerical simulations between 140 and 127 ka, version 1.0[J]. GEOSCIENTIFIC MODEL DEVELOPMENT,2019-01-01,12(8):3649-3685