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Limits on determining the skill of North Atlantic Ocean decadal predictions

The northern North Atlantic is important globally both through its impact on the Atlantic Meridional Overturning Circulation (AMOC) and through widespread atmospheric teleconnections. The region has been shown to be potentially predictable a decade ahead with the skill of decadal predictions assesse...

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Detalles Bibliográficos
Autores principales: Menary, Matthew B., Hermanson, Leon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5923258/
https://www.ncbi.nlm.nih.gov/pubmed/29703895
http://dx.doi.org/10.1038/s41467-018-04043-9
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author Menary, Matthew B.
Hermanson, Leon
author_facet Menary, Matthew B.
Hermanson, Leon
author_sort Menary, Matthew B.
collection PubMed
description The northern North Atlantic is important globally both through its impact on the Atlantic Meridional Overturning Circulation (AMOC) and through widespread atmospheric teleconnections. The region has been shown to be potentially predictable a decade ahead with the skill of decadal predictions assessed against reanalyses of the ocean state. Here, we show that the prediction skill in this region is strongly dependent on the choice of reanalysis used for validation, and describe the causes. Multiannual skill in key metrics such as Labrador Sea density and the AMOC depends on more than simply the choice of the prediction model. Instead, this skill is related to the similarity between the nature of interannual density variability in the underlying climate model and the chosen reanalysis. The climate models used in these decadal predictions are also used in climate projections, which raises questions about the sensitivity of these projections to the models’ innate North Atlantic density variability.
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spelling pubmed-59232582018-04-30 Limits on determining the skill of North Atlantic Ocean decadal predictions Menary, Matthew B. Hermanson, Leon Nat Commun Article The northern North Atlantic is important globally both through its impact on the Atlantic Meridional Overturning Circulation (AMOC) and through widespread atmospheric teleconnections. The region has been shown to be potentially predictable a decade ahead with the skill of decadal predictions assessed against reanalyses of the ocean state. Here, we show that the prediction skill in this region is strongly dependent on the choice of reanalysis used for validation, and describe the causes. Multiannual skill in key metrics such as Labrador Sea density and the AMOC depends on more than simply the choice of the prediction model. Instead, this skill is related to the similarity between the nature of interannual density variability in the underlying climate model and the chosen reanalysis. The climate models used in these decadal predictions are also used in climate projections, which raises questions about the sensitivity of these projections to the models’ innate North Atlantic density variability. Nature Publishing Group UK 2018-04-27 /pmc/articles/PMC5923258/ /pubmed/29703895 http://dx.doi.org/10.1038/s41467-018-04043-9 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Menary, Matthew B.
Hermanson, Leon
Limits on determining the skill of North Atlantic Ocean decadal predictions
title Limits on determining the skill of North Atlantic Ocean decadal predictions
title_full Limits on determining the skill of North Atlantic Ocean decadal predictions
title_fullStr Limits on determining the skill of North Atlantic Ocean decadal predictions
title_full_unstemmed Limits on determining the skill of North Atlantic Ocean decadal predictions
title_short Limits on determining the skill of North Atlantic Ocean decadal predictions
title_sort limits on determining the skill of north atlantic ocean decadal predictions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5923258/
https://www.ncbi.nlm.nih.gov/pubmed/29703895
http://dx.doi.org/10.1038/s41467-018-04043-9
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