Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments
Abstract Climate model simulations that restore SSTs in the North Atlantic have been used to explore the climate impacts of Atlantic Multidecadal Variability (AMV). However, despite simulations and observations exhibiting similar North Atlantic SST anomalies, experiments with active SST-restoring in...
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ftdoajarticles:oai:doaj.org/article:afa819f8ec274e50bafb253418fbf428 2023-05-15T17:25:47+02:00 Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments Christopher H. O’Reilly Matthew Patterson Jon Robson Paul Arthur Monerie Daniel Hodson Yohan Ruprich-Robert 2023-02-01T00:00:00Z https://doi.org/10.1038/s41612-023-00335-0 https://doaj.org/article/afa819f8ec274e50bafb253418fbf428 EN eng Nature Portfolio https://doi.org/10.1038/s41612-023-00335-0 https://doaj.org/toc/2397-3722 doi:10.1038/s41612-023-00335-0 2397-3722 https://doaj.org/article/afa819f8ec274e50bafb253418fbf428 npj Climate and Atmospheric Science, Vol 6, Iss 1, Pp 1-12 (2023) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1038/s41612-023-00335-0 2023-03-26T01:33:34Z Abstract Climate model simulations that restore SSTs in the North Atlantic have been used to explore the climate impacts of Atlantic Multidecadal Variability (AMV). However, despite simulations and observations exhibiting similar North Atlantic SST anomalies, experiments with active SST-restoring in the Tropical North Atlantic exhibit strong positive surface heat-fluxes out of the ocean with warm SST anomalies, which is not replicated in other simulations or observations. The upward surface heat-fluxes that are systematically driven by the active SST-restoring in the Tropical North Atlantic are found to be crucial for generating a strong local precipitation response and the associated remote impact on the Pacific Walker circulation; these are both absent in other simulations. The results of this study strongly suggest that experiments employing SST-restoring (or prescribed SSTs) in the Tropical North Atlantic exaggerate the influence of the Atlantic on patterns of global climate anomalies and its role in recent multidecadal SST trends. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Pacific npj Climate and Atmospheric Science 6 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Christopher H. O’Reilly Matthew Patterson Jon Robson Paul Arthur Monerie Daniel Hodson Yohan Ruprich-Robert Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments |
topic_facet |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Abstract Climate model simulations that restore SSTs in the North Atlantic have been used to explore the climate impacts of Atlantic Multidecadal Variability (AMV). However, despite simulations and observations exhibiting similar North Atlantic SST anomalies, experiments with active SST-restoring in the Tropical North Atlantic exhibit strong positive surface heat-fluxes out of the ocean with warm SST anomalies, which is not replicated in other simulations or observations. The upward surface heat-fluxes that are systematically driven by the active SST-restoring in the Tropical North Atlantic are found to be crucial for generating a strong local precipitation response and the associated remote impact on the Pacific Walker circulation; these are both absent in other simulations. The results of this study strongly suggest that experiments employing SST-restoring (or prescribed SSTs) in the Tropical North Atlantic exaggerate the influence of the Atlantic on patterns of global climate anomalies and its role in recent multidecadal SST trends. |
format |
Article in Journal/Newspaper |
author |
Christopher H. O’Reilly Matthew Patterson Jon Robson Paul Arthur Monerie Daniel Hodson Yohan Ruprich-Robert |
author_facet |
Christopher H. O’Reilly Matthew Patterson Jon Robson Paul Arthur Monerie Daniel Hodson Yohan Ruprich-Robert |
author_sort |
Christopher H. O’Reilly |
title |
Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments |
title_short |
Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments |
title_full |
Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments |
title_fullStr |
Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments |
title_full_unstemmed |
Challenges with interpreting the impact of Atlantic Multidecadal Variability using SST-restoring experiments |
title_sort |
challenges with interpreting the impact of atlantic multidecadal variability using sst-restoring experiments |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41612-023-00335-0 https://doaj.org/article/afa819f8ec274e50bafb253418fbf428 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
npj Climate and Atmospheric Science, Vol 6, Iss 1, Pp 1-12 (2023) |
op_relation |
https://doi.org/10.1038/s41612-023-00335-0 https://doaj.org/toc/2397-3722 doi:10.1038/s41612-023-00335-0 2397-3722 https://doaj.org/article/afa819f8ec274e50bafb253418fbf428 |
op_doi |
https://doi.org/10.1038/s41612-023-00335-0 |
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npj Climate and Atmospheric Science |
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6 |
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1 |
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1766117282331754496 |