Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions
This study uses the <q>simplified patterns of temperature and effective precipitation</q> approach from the Australian component of the international palaeoclimate synthesis effort (INTegration of Ice core, MArine and TErrestrial records - OZ-INTIMATE) to compare atmosphere-ocean general...
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Copernicus GmbH
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Online Access: | http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164138 https://doi.org/10.5194/cp-13-1661-2017 |
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ftfederationuniv:vital:12989 2023-05-15T16:39:24+02:00 Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions Ackerley, Duncan Reeves, Jessica Barr, Cameron Bostock, Helen Fitzsimmons, Kathryn Fletcher, Michael-Shawn Gouramanis, Chris McGregor, Helen Mooney, Scott Phipps, Steven Tibby, John Tyler, Jonathan 2017 http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164138 https://doi.org/10.5194/cp-13-1661-2017 unknown Copernicus GmbH Climate of the Past Vol. 13, no. 11 (2017), p. 1661-1684 http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164138 vital:12989 https://doi.org/10.5194/cp-13-1661-2017 ISBN:1814-9324 https://creativecommons.org/licenses/by/3.0 Copyright © Author(s) 2017. Open Access This metadata is freely available under a CCO license CC-BY 0406 Physical Geography and Environmental Geoscience Air-sea interaction Climate modeling Holocene Paleoclimate Paleoenvironment Precipitation (climatology) Southern Hemisphere Oceanic regions Text Journal article 2017 ftfederationuniv https://doi.org/10.5194/cp-13-1661-2017 2022-12-01T18:57:13Z This study uses the <q>simplified patterns of temperature and effective precipitation</q> approach from the Australian component of the international palaeoclimate synthesis effort (INTegration of Ice core, MArine and TErrestrial records - OZ-INTIMATE) to compare atmosphere-ocean general circulation model (AOGCM) simulations and proxy reconstructions. The approach is used in order to identify important properties (e.g. circulation and precipitation) of past climatic states from the models and proxies, which is a primary objective of the Southern Hemisphere Assessment of PalaeoEnvironment (SHAPE) initiative. The AOGCM data are taken from the Paleoclimate Modelling Intercomparison Project (PMIP) mid-Holocene (ca. 6000 years before present, 6 ka) and pre-industrial control (ca. 1750 CE, 0 ka) experiments. The synthesis presented here shows that the models and proxies agree on the differences in climate state for 6 ka relative to 0 ka, when they are insolation driven. The largest uncertainty between the models and the proxies occurs over the Indo-Pacific Warm Pool (IPWP). The analysis shows that the lower temperatures in the Pacific at around 6 ka in the models may be the result of an enhancement of an existing systematic error. It is therefore difficult to decipher which one of the proxies and/or the models is correct. This study also shows that a reduction in the Equator-to-pole temperature difference in the Southern Hemisphere causes the mid-latitude westerly wind strength to reduce in the models; however, the simulated rainfall actually increases over the southern temperate zone of Australia as a result of higher convective precipitation. Such a mechanism (increased convection) may be useful for resolving disparities between different regional proxy records and model simulations. Finally, after assessing the available datasets (model and proxy), opportunities for better model-proxy integrated research are discussed. © Author(s) 2017. Article in Journal/Newspaper ice core Southern Ocean Federation University Australia: Federation ResearchOnline Southern Ocean Pacific Climate of the Past 13 11 1661 1684 |
institution |
Open Polar |
collection |
Federation University Australia: Federation ResearchOnline |
op_collection_id |
ftfederationuniv |
language |
unknown |
topic |
0406 Physical Geography and Environmental Geoscience Air-sea interaction Climate modeling Holocene Paleoclimate Paleoenvironment Precipitation (climatology) Southern Hemisphere Oceanic regions |
spellingShingle |
0406 Physical Geography and Environmental Geoscience Air-sea interaction Climate modeling Holocene Paleoclimate Paleoenvironment Precipitation (climatology) Southern Hemisphere Oceanic regions Ackerley, Duncan Reeves, Jessica Barr, Cameron Bostock, Helen Fitzsimmons, Kathryn Fletcher, Michael-Shawn Gouramanis, Chris McGregor, Helen Mooney, Scott Phipps, Steven Tibby, John Tyler, Jonathan Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
topic_facet |
0406 Physical Geography and Environmental Geoscience Air-sea interaction Climate modeling Holocene Paleoclimate Paleoenvironment Precipitation (climatology) Southern Hemisphere Oceanic regions |
description |
This study uses the <q>simplified patterns of temperature and effective precipitation</q> approach from the Australian component of the international palaeoclimate synthesis effort (INTegration of Ice core, MArine and TErrestrial records - OZ-INTIMATE) to compare atmosphere-ocean general circulation model (AOGCM) simulations and proxy reconstructions. The approach is used in order to identify important properties (e.g. circulation and precipitation) of past climatic states from the models and proxies, which is a primary objective of the Southern Hemisphere Assessment of PalaeoEnvironment (SHAPE) initiative. The AOGCM data are taken from the Paleoclimate Modelling Intercomparison Project (PMIP) mid-Holocene (ca. 6000 years before present, 6 ka) and pre-industrial control (ca. 1750 CE, 0 ka) experiments. The synthesis presented here shows that the models and proxies agree on the differences in climate state for 6 ka relative to 0 ka, when they are insolation driven. The largest uncertainty between the models and the proxies occurs over the Indo-Pacific Warm Pool (IPWP). The analysis shows that the lower temperatures in the Pacific at around 6 ka in the models may be the result of an enhancement of an existing systematic error. It is therefore difficult to decipher which one of the proxies and/or the models is correct. This study also shows that a reduction in the Equator-to-pole temperature difference in the Southern Hemisphere causes the mid-latitude westerly wind strength to reduce in the models; however, the simulated rainfall actually increases over the southern temperate zone of Australia as a result of higher convective precipitation. Such a mechanism (increased convection) may be useful for resolving disparities between different regional proxy records and model simulations. Finally, after assessing the available datasets (model and proxy), opportunities for better model-proxy integrated research are discussed. © Author(s) 2017. |
format |
Article in Journal/Newspaper |
author |
Ackerley, Duncan Reeves, Jessica Barr, Cameron Bostock, Helen Fitzsimmons, Kathryn Fletcher, Michael-Shawn Gouramanis, Chris McGregor, Helen Mooney, Scott Phipps, Steven Tibby, John Tyler, Jonathan |
author_facet |
Ackerley, Duncan Reeves, Jessica Barr, Cameron Bostock, Helen Fitzsimmons, Kathryn Fletcher, Michael-Shawn Gouramanis, Chris McGregor, Helen Mooney, Scott Phipps, Steven Tibby, John Tyler, Jonathan |
author_sort |
Ackerley, Duncan |
title |
Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
title_short |
Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
title_full |
Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
title_fullStr |
Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
title_full_unstemmed |
Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
title_sort |
evaluation of pmip2 and pmip3 simulations of mid-holocene climate in the indo-pacific, australasian and southern ocean regions |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164138 https://doi.org/10.5194/cp-13-1661-2017 |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
ice core Southern Ocean |
genre_facet |
ice core Southern Ocean |
op_relation |
Climate of the Past Vol. 13, no. 11 (2017), p. 1661-1684 http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164138 vital:12989 https://doi.org/10.5194/cp-13-1661-2017 ISBN:1814-9324 |
op_rights |
https://creativecommons.org/licenses/by/3.0 Copyright © Author(s) 2017. Open Access This metadata is freely available under a CCO license |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-13-1661-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
11 |
container_start_page |
1661 |
op_container_end_page |
1684 |
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1766029751165648896 |