Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions
The last deglaciation, which marked the transition between the last glacial and present interglacial periods, was punctuated by a series of rapid (centennial and decadal) climate changes. Numerical climate models are useful for investigating mechanisms that underpin the climate change events, especi...
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ftcopernicus:oai:publications.copernicus.org:gmd32421 2023-05-15T16:41:08+02:00 Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions Ivanovic, Ruza F. Gregoire, Lauren J. Kageyama, Masa Roche, Didier M. Valdes, Paul J. Burke, Andrea Drummond, Rosemarie Peltier, W. Richard Tarasov, Lev 2018-09-27 application/pdf https://doi.org/10.5194/gmd-9-2563-2016 https://gmd.copernicus.org/articles/9/2563/2016/ eng eng doi:10.5194/gmd-9-2563-2016 https://gmd.copernicus.org/articles/9/2563/2016/ eISSN: 1991-9603 Text 2018 ftcopernicus https://doi.org/10.5194/gmd-9-2563-2016 2020-07-20T16:24:03Z The last deglaciation, which marked the transition between the last glacial and present interglacial periods, was punctuated by a series of rapid (centennial and decadal) climate changes. Numerical climate models are useful for investigating mechanisms that underpin the climate change events, especially now that some of the complex models can be run for multiple millennia. We have set up a Paleoclimate Modelling Intercomparison Project (PMIP) working group to coordinate efforts to run transient simulations of the last deglaciation, and to facilitate the dissemination of expertise between modellers and those engaged with reconstructing the climate of the last 21 000 years. Here, we present the design of a coordinated Core experiment over the period 21–9 thousand years before present (ka) with time-varying orbital forcing, greenhouse gases, ice sheets and other geographical changes. A choice of two ice sheet reconstructions is given, and we make recommendations for prescribing ice meltwater (or not) in the Core experiment. Additional focussed simulations will also be coordinated on an ad hoc basis by the working group, for example to investigate more thoroughly the effect of ice meltwater on climate system evolution, and to examine the uncertainty in other forcings. Some of these focussed simulations will target shorter durations around specific events in order to understand them in more detail and allow for the more computationally expensive models to take part. Text Ice Sheet Copernicus Publications: E-Journals Geoscientific Model Development 9 7 2563 2587 |
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Copernicus Publications: E-Journals |
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English |
description |
The last deglaciation, which marked the transition between the last glacial and present interglacial periods, was punctuated by a series of rapid (centennial and decadal) climate changes. Numerical climate models are useful for investigating mechanisms that underpin the climate change events, especially now that some of the complex models can be run for multiple millennia. We have set up a Paleoclimate Modelling Intercomparison Project (PMIP) working group to coordinate efforts to run transient simulations of the last deglaciation, and to facilitate the dissemination of expertise between modellers and those engaged with reconstructing the climate of the last 21 000 years. Here, we present the design of a coordinated Core experiment over the period 21–9 thousand years before present (ka) with time-varying orbital forcing, greenhouse gases, ice sheets and other geographical changes. A choice of two ice sheet reconstructions is given, and we make recommendations for prescribing ice meltwater (or not) in the Core experiment. Additional focussed simulations will also be coordinated on an ad hoc basis by the working group, for example to investigate more thoroughly the effect of ice meltwater on climate system evolution, and to examine the uncertainty in other forcings. Some of these focussed simulations will target shorter durations around specific events in order to understand them in more detail and allow for the more computationally expensive models to take part. |
format |
Text |
author |
Ivanovic, Ruza F. Gregoire, Lauren J. Kageyama, Masa Roche, Didier M. Valdes, Paul J. Burke, Andrea Drummond, Rosemarie Peltier, W. Richard Tarasov, Lev |
spellingShingle |
Ivanovic, Ruza F. Gregoire, Lauren J. Kageyama, Masa Roche, Didier M. Valdes, Paul J. Burke, Andrea Drummond, Rosemarie Peltier, W. Richard Tarasov, Lev Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions |
author_facet |
Ivanovic, Ruza F. Gregoire, Lauren J. Kageyama, Masa Roche, Didier M. Valdes, Paul J. Burke, Andrea Drummond, Rosemarie Peltier, W. Richard Tarasov, Lev |
author_sort |
Ivanovic, Ruza F. |
title |
Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions |
title_short |
Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions |
title_full |
Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions |
title_fullStr |
Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions |
title_full_unstemmed |
Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions |
title_sort |
transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – pmip4 core experiment design and boundary conditions |
publishDate |
2018 |
url |
https://doi.org/10.5194/gmd-9-2563-2016 https://gmd.copernicus.org/articles/9/2563/2016/ |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
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eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-9-2563-2016 https://gmd.copernicus.org/articles/9/2563/2016/ |
op_doi |
https://doi.org/10.5194/gmd-9-2563-2016 |
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Geoscientific Model Development |
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9 |
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7 |
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2563 |
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2587 |
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