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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ftdoajarticles:oai:doaj.org/article:40ff9affa35e495282cf20ff9578af4a 2023-05-15T16:39:23+02:00 Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions D. Ackerley J. Reeves C. Barr H. Bostock K. Fitzsimmons M.-S. Fletcher C. Gouramanis H. McGregor S. Mooney S. J. Phipps J. Tibby J. Tyler 2017-11-01T00:00:00Z https://doi.org/10.5194/cp-13-1661-2017 https://doaj.org/article/40ff9affa35e495282cf20ff9578af4a EN eng Copernicus Publications https://www.clim-past.net/13/1661/2017/cp-13-1661-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-1661-2017 1814-9324 1814-9332 https://doaj.org/article/40ff9affa35e495282cf20ff9578af4a Climate of the Past, Vol 13, Pp 1661-1684 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-1661-2017 2022-12-31T00:05:09Z 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. Article in Journal/Newspaper ice core Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Pacific Climate of the Past 13 11 1661 1684 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 D. Ackerley J. Reeves C. Barr H. Bostock K. Fitzsimmons M.-S. Fletcher C. Gouramanis H. McGregor S. Mooney S. J. Phipps J. Tibby J. Tyler Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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. |
format |
Article in Journal/Newspaper |
author |
D. Ackerley J. Reeves C. Barr H. Bostock K. Fitzsimmons M.-S. Fletcher C. Gouramanis H. McGregor S. Mooney S. J. Phipps J. Tibby J. Tyler |
author_facet |
D. Ackerley J. Reeves C. Barr H. Bostock K. Fitzsimmons M.-S. Fletcher C. Gouramanis H. McGregor S. Mooney S. J. Phipps J. Tibby J. Tyler |
author_sort |
D. Ackerley |
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 Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-1661-2017 https://doaj.org/article/40ff9affa35e495282cf20ff9578af4a |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
ice core Southern Ocean |
genre_facet |
ice core Southern Ocean |
op_source |
Climate of the Past, Vol 13, Pp 1661-1684 (2017) |
op_relation |
https://www.clim-past.net/13/1661/2017/cp-13-1661-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-1661-2017 1814-9324 1814-9332 https://doaj.org/article/40ff9affa35e495282cf20ff9578af4a |
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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1766029733304205312 |