Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions
Paleoclimate proxy reconstruction initiatives, such as the Australian component of the international paleoclimate synthesis effort: INTegration of Ice core, MArine and Terrestrial records (OZ-INTIMATE), are important as they provide evidence of past climatic conditions that are necessary to evaluate...
Main Authors: | , , , , , , , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | http://hdl.handle.net/11858/00-001M-0000-002E-34CF-9 |
id |
ftpubman:oai:pure.mpg.de:item_2503495 |
---|---|
record_format |
openpolar |
spelling |
ftpubman:oai:pure.mpg.de:item_2503495 2023-08-20T04:07:13+02:00 Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions Ackerley, D. Reeves, J. Barr, C. Bostock, H. Fitzsimmons, K. Fletcher, M. Gouramanis, C. McGregor, H. Mooney, S. Phipps, S. Tibby, J. Tyler, J. 2017 http://hdl.handle.net/11858/00-001M-0000-002E-34CF-9 eng eng info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-2016-136 http://hdl.handle.net/11858/00-001M-0000-002E-34CF-9 Climate of the past discussions info:eu-repo/semantics/workingPaper 2017 ftpubman https://doi.org/10.5194/cp-2016-136 2023-08-01T21:24:46Z Paleoclimate proxy reconstruction initiatives, such as the Australian component of the international paleoclimate synthesis effort: INTegration of Ice core, MArine and Terrestrial records (OZ-INTIMATE), are important as they provide evidence of past climatic conditions that are necessary to evaluate global General Circulation Models (GCMs). One of the key outputs from the OZ-INTIMATE project was the production of spatially-coherent, climatic reconstructions over the southern Maritime Continent, Australasia and the Southern Ocean. The OZ-INTIMATE results were presented as regional, "simplified patterns of temperature and effective precipitation" and those regions spanned a large enough area to contain several GCM grid boxes. Therefore, the "upscaling" of individual reconstructions (through OZ-INTIMATE) to a scale that was resolved by GCMs, presented an ideal opportunity for a direct comparison. This study uses the same "simplified patterns of temperature and effective precipitation" approach from OZ-INTIMATE on data from an ensemble of GCMs. The GCM data are taken from the Paleoclimate Modeling Intercomparison Project (PMIP) mid-Holocene (6000 years before present, 6 ka) and pre-industrial control (c1750 C.E., 0 ka) experiments. The synthesis presented here shows that, on the whole, the models and proxies agree on the differences in climate state for 6 ka relative to 0 ka, when they are insolation driven. The main disagreement between the models and proxies occurs over the Tropical West Pacific warm pool and arises from an intensification of an existing error (the "cold tongue bias"). This study also presents a mechanism whereby the strength of the Southern Hemisphere, mid-latitude westerly wind strength reduces but rainfall increases over the southern temperate zone of Australia. Such a mechanism 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 ... Report ice core Southern Ocean Max Planck Society: MPG.PuRe Pacific Southern Ocean |
institution |
Open Polar |
collection |
Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
Paleoclimate proxy reconstruction initiatives, such as the Australian component of the international paleoclimate synthesis effort: INTegration of Ice core, MArine and Terrestrial records (OZ-INTIMATE), are important as they provide evidence of past climatic conditions that are necessary to evaluate global General Circulation Models (GCMs). One of the key outputs from the OZ-INTIMATE project was the production of spatially-coherent, climatic reconstructions over the southern Maritime Continent, Australasia and the Southern Ocean. The OZ-INTIMATE results were presented as regional, "simplified patterns of temperature and effective precipitation" and those regions spanned a large enough area to contain several GCM grid boxes. Therefore, the "upscaling" of individual reconstructions (through OZ-INTIMATE) to a scale that was resolved by GCMs, presented an ideal opportunity for a direct comparison. This study uses the same "simplified patterns of temperature and effective precipitation" approach from OZ-INTIMATE on data from an ensemble of GCMs. The GCM data are taken from the Paleoclimate Modeling Intercomparison Project (PMIP) mid-Holocene (6000 years before present, 6 ka) and pre-industrial control (c1750 C.E., 0 ka) experiments. The synthesis presented here shows that, on the whole, the models and proxies agree on the differences in climate state for 6 ka relative to 0 ka, when they are insolation driven. The main disagreement between the models and proxies occurs over the Tropical West Pacific warm pool and arises from an intensification of an existing error (the "cold tongue bias"). This study also presents a mechanism whereby the strength of the Southern Hemisphere, mid-latitude westerly wind strength reduces but rainfall increases over the southern temperate zone of Australia. Such a mechanism 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 ... |
format |
Report |
author |
Ackerley, D. Reeves, J. Barr, C. Bostock, H. Fitzsimmons, K. Fletcher, M. Gouramanis, C. McGregor, H. Mooney, S. Phipps, S. Tibby, J. Tyler, J. |
spellingShingle |
Ackerley, D. Reeves, J. Barr, C. Bostock, H. Fitzsimmons, K. Fletcher, M. Gouramanis, C. McGregor, H. Mooney, S. Phipps, S. Tibby, J. Tyler, J. Evaluation of PMIP2 and PMIP3 simulations of mid-Holocene climate in the Indo-Pacific, Australasian and Southern Ocean regions |
author_facet |
Ackerley, D. Reeves, J. Barr, C. Bostock, H. Fitzsimmons, K. Fletcher, M. Gouramanis, C. McGregor, H. Mooney, S. Phipps, S. Tibby, J. Tyler, J. |
author_sort |
Ackerley, D. |
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 |
publishDate |
2017 |
url |
http://hdl.handle.net/11858/00-001M-0000-002E-34CF-9 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
ice core Southern Ocean |
genre_facet |
ice core Southern Ocean |
op_source |
Climate of the past discussions |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-2016-136 http://hdl.handle.net/11858/00-001M-0000-002E-34CF-9 |
op_doi |
https://doi.org/10.5194/cp-2016-136 |
_version_ |
1774718689358118912 |