Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change
International audience The Pole-Equator-Pole (PEP) projects of the PANASH (Paleoclimates of the Northern and Southern Hemisphere) programme have significantly advanced our understanding of past climate change on a global basis and helped to integrate paleo-science across regions and research discipl...
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ftccsdartic:oai:HAL:hal-00298056v1 2023-11-12T04:02:36+01:00 Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change Shulmeister, J. Rodbell, D. T. Gagan, M. K. Seltzer, G. O. Department of Geological Sciences University of Canterbury Christchurch Department of Geology Union College Research School of Earth Sciences Canberra (RSES) Australian National University (ANU) Department of Earth Sciences Syracuse Syracuse University 2006-10-26 https://hal.science/hal-00298056 https://hal.science/hal-00298056/document https://hal.science/hal-00298056/file/cp-2-167-2006.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00298056 https://hal.science/hal-00298056 https://hal.science/hal-00298056/document https://hal.science/hal-00298056/file/cp-2-167-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00298056 Climate of the Past, 2006, 2 (2), pp.167-185 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:15:29Z International audience The Pole-Equator-Pole (PEP) projects of the PANASH (Paleoclimates of the Northern and Southern Hemisphere) programme have significantly advanced our understanding of past climate change on a global basis and helped to integrate paleo-science across regions and research disciplines. PANASH science allows us to constrain predictions for future climate change and to contribute to the management of consequent environmental changes. We identify three broad areas where PEP science makes key contributions. 1. The pattern of global changes. Knowing the exact timing of glacial advances (synchronous or otherwise) during the last glaciation is critical to understanding inter-hemispheric links in climate. Work in PEPI demonstrated that the tropical Andes in South America were deglaciated earlier than the Northern Hemisphere (NH) and that an extended warming began there ca. 21 000 cal years BP. The general pattern is consistent with Antarctica and has now been replicated from studies in Southern Hemisphere (SH) regions of the PEPII transect. That significant deglaciation of SH alpine systems and Antarctica led deglaciation of NH ice sheets may reflect either i) faster response times in alpine systems and Antarctica, ii) regional moisture patterns that influenced glacier mass balance, or iii) a SH temperature forcing that led changes in the NH. This highlights the limitations of current understanding and the need for further fundamental paleoclimate research. 2. Changes in modes of operation of oscillatory climate systems. Work across all the PEP transects has led to the recognition that the El Niño Southern Oscillation (ENSO) phenomenon has changed markedly through time. It now appears that ENSO operated during the last glacial termination and during the early Holocene, but that precipitation teleconnections even within the Pacific Basin were turned down, or off. In the modern ENSO phenomenon both inter-annual and seven year periodicities are present, with the inter-annual signal dominant. Paleo-data ... Article in Journal/Newspaper Antarc* Antarctica Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
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[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Shulmeister, J. Rodbell, D. T. Gagan, M. K. Seltzer, G. O. Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The Pole-Equator-Pole (PEP) projects of the PANASH (Paleoclimates of the Northern and Southern Hemisphere) programme have significantly advanced our understanding of past climate change on a global basis and helped to integrate paleo-science across regions and research disciplines. PANASH science allows us to constrain predictions for future climate change and to contribute to the management of consequent environmental changes. We identify three broad areas where PEP science makes key contributions. 1. The pattern of global changes. Knowing the exact timing of glacial advances (synchronous or otherwise) during the last glaciation is critical to understanding inter-hemispheric links in climate. Work in PEPI demonstrated that the tropical Andes in South America were deglaciated earlier than the Northern Hemisphere (NH) and that an extended warming began there ca. 21 000 cal years BP. The general pattern is consistent with Antarctica and has now been replicated from studies in Southern Hemisphere (SH) regions of the PEPII transect. That significant deglaciation of SH alpine systems and Antarctica led deglaciation of NH ice sheets may reflect either i) faster response times in alpine systems and Antarctica, ii) regional moisture patterns that influenced glacier mass balance, or iii) a SH temperature forcing that led changes in the NH. This highlights the limitations of current understanding and the need for further fundamental paleoclimate research. 2. Changes in modes of operation of oscillatory climate systems. Work across all the PEP transects has led to the recognition that the El Niño Southern Oscillation (ENSO) phenomenon has changed markedly through time. It now appears that ENSO operated during the last glacial termination and during the early Holocene, but that precipitation teleconnections even within the Pacific Basin were turned down, or off. In the modern ENSO phenomenon both inter-annual and seven year periodicities are present, with the inter-annual signal dominant. Paleo-data ... |
author2 |
Department of Geological Sciences University of Canterbury Christchurch Department of Geology Union College Research School of Earth Sciences Canberra (RSES) Australian National University (ANU) Department of Earth Sciences Syracuse Syracuse University |
format |
Article in Journal/Newspaper |
author |
Shulmeister, J. Rodbell, D. T. Gagan, M. K. Seltzer, G. O. |
author_facet |
Shulmeister, J. Rodbell, D. T. Gagan, M. K. Seltzer, G. O. |
author_sort |
Shulmeister, J. |
title |
Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
title_short |
Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
title_full |
Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
title_fullStr |
Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
title_full_unstemmed |
Inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
title_sort |
inter-hemispheric linkages in climate change: paleo-perspectives for future climate change |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00298056 https://hal.science/hal-00298056/document https://hal.science/hal-00298056/file/cp-2-167-2006.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00298056 Climate of the Past, 2006, 2 (2), pp.167-185 |
op_relation |
hal-00298056 https://hal.science/hal-00298056 https://hal.science/hal-00298056/document https://hal.science/hal-00298056/file/cp-2-167-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334733725728768 |