PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate
Abstract We describe the development of the “Paleoclimate PLASIM-GENIE (Planet Simulator–Grid-Enabled Integrated Earth system model) emulator” PALEO-PGEM and its application to derive a downscaled high-resolution spatio-temporal description of the climate of the last 5×106 years. The 5×106-year time...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:154451 2023-05-15T16:41:02+02:00 PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate Holden, PB Edwards, NR Rangel, TF Pereira, EB Tran, GT Wilkinson, RD 2019-12-10 text https://eprints.whiterose.ac.uk/154451/ https://eprints.whiterose.ac.uk/154451/1/gmd-2018-242.pdf en eng Copernicus Publications https://eprints.whiterose.ac.uk/154451/1/gmd-2018-242.pdf Holden, PB, Edwards, NR, Rangel, TF et al. (3 more authors) (2019) PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate. Geoscientific Model Development Discussions, 12 (12). ISSN 1991-9611 attached Article PeerReviewed 2019 ftleedsuniv 2023-01-30T22:25:04Z Abstract We describe the development of the “Paleoclimate PLASIM-GENIE (Planet Simulator–Grid-Enabled Integrated Earth system model) emulator” PALEO-PGEM and its application to derive a downscaled high-resolution spatio-temporal description of the climate of the last 5×106 years. The 5×106-year time frame is interesting for a range of paleo-environmental questions, not least because it encompasses the evolution of humans. However, the choice of time frame was primarily pragmatic; tectonic changes can be neglected to first order, so that it is reasonable to consider climate forcing restricted to the Earth's orbital configuration, ice-sheet state, and the concentration of atmosphere CO2. The approach uses the Gaussian process emulation of the singular value decomposition of ensembles of the intermediate-complexity atmosphere–ocean GCM (general circulation model) PLASIM-GENIE. Spatial fields of bioclimatic variables of surface air temperature (warmest and coolest seasons) and precipitation (wettest and driest seasons) are emulated at 1000-year intervals, driven by time series of scalar boundary-condition forcing (CO2, orbit, and ice volume) and assuming the climate is in quasi-equilibrium. Paleoclimate anomalies at climate model resolution are interpolated onto the observed modern climatology to produce a high-resolution spatio-temporal paleoclimate reconstruction of the Pliocene–Pleistocene. Article in Journal/Newspaper Ice Sheet White Rose Research Online (Universities of Leeds, Sheffield & York) |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
Abstract We describe the development of the “Paleoclimate PLASIM-GENIE (Planet Simulator–Grid-Enabled Integrated Earth system model) emulator” PALEO-PGEM and its application to derive a downscaled high-resolution spatio-temporal description of the climate of the last 5×106 years. The 5×106-year time frame is interesting for a range of paleo-environmental questions, not least because it encompasses the evolution of humans. However, the choice of time frame was primarily pragmatic; tectonic changes can be neglected to first order, so that it is reasonable to consider climate forcing restricted to the Earth's orbital configuration, ice-sheet state, and the concentration of atmosphere CO2. The approach uses the Gaussian process emulation of the singular value decomposition of ensembles of the intermediate-complexity atmosphere–ocean GCM (general circulation model) PLASIM-GENIE. Spatial fields of bioclimatic variables of surface air temperature (warmest and coolest seasons) and precipitation (wettest and driest seasons) are emulated at 1000-year intervals, driven by time series of scalar boundary-condition forcing (CO2, orbit, and ice volume) and assuming the climate is in quasi-equilibrium. Paleoclimate anomalies at climate model resolution are interpolated onto the observed modern climatology to produce a high-resolution spatio-temporal paleoclimate reconstruction of the Pliocene–Pleistocene. |
format |
Article in Journal/Newspaper |
author |
Holden, PB Edwards, NR Rangel, TF Pereira, EB Tran, GT Wilkinson, RD |
spellingShingle |
Holden, PB Edwards, NR Rangel, TF Pereira, EB Tran, GT Wilkinson, RD PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate |
author_facet |
Holden, PB Edwards, NR Rangel, TF Pereira, EB Tran, GT Wilkinson, RD |
author_sort |
Holden, PB |
title |
PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate |
title_short |
PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate |
title_full |
PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate |
title_fullStr |
PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate |
title_full_unstemmed |
PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate |
title_sort |
paleo-pgem v1.0 : a statistical emulator of pliocene-pleistocene climate |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://eprints.whiterose.ac.uk/154451/ https://eprints.whiterose.ac.uk/154451/1/gmd-2018-242.pdf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://eprints.whiterose.ac.uk/154451/1/gmd-2018-242.pdf Holden, PB, Edwards, NR, Rangel, TF et al. (3 more authors) (2019) PALEO-PGEM v1.0 : A statistical emulator of Pliocene-Pleistocene climate. Geoscientific Model Development Discussions, 12 (12). ISSN 1991-9611 |
op_rights |
attached |
_version_ |
1766031477477212160 |