Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations
In this study, we use the Whole Atmosphere Community Climate Model, forced by present-day atmospheric composition and coupled to a Slab Ocean Model, to simulate the state of the climate under grand solar minimum forcing scenarios. Idealized experiments prescribe time-invariant solar irradiance reduc...
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ftdoajarticles:oai:doaj.org/article:1948a879a3254f198370c8965ab2027d 2024-02-27T08:44:41+00:00 Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations Nazario Tartaglione Thomas Toniazzo Odd Helge Otterå Yvan Orsolini 2023-12-01T00:00:00Z https://doi.org/10.3390/cli12010001 https://doaj.org/article/1948a879a3254f198370c8965ab2027d EN eng MDPI AG https://www.mdpi.com/2225-1154/12/1/1 https://doaj.org/toc/2225-1154 doi:10.3390/cli12010001 2225-1154 https://doaj.org/article/1948a879a3254f198370c8965ab2027d Climate, Vol 12, Iss 1, p 1 (2023) solar activity climate change projections global models Science Q article 2023 ftdoajarticles https://doi.org/10.3390/cli12010001 2024-01-28T01:44:35Z In this study, we use the Whole Atmosphere Community Climate Model, forced by present-day atmospheric composition and coupled to a Slab Ocean Model, to simulate the state of the climate under grand solar minimum forcing scenarios. Idealized experiments prescribe time-invariant solar irradiance reductions that are either uniform (percentage-wise) across the total solar radiation spectrum (TOTC) or spectrally localized in the ultraviolet (UV) band (SCUV). We compare the equilibrium condition of these experiments with the equilibrium condition of a control simulation, forced by perpetual solar maximum conditions. In SCUV, we observe large stratospheric cooling due to ozone reduction. In both the Northern Hemisphere (NH) and the Southern Hemisphere (SH), this is accompanied by a weakening of the polar night jet during the cold season. In TOTC, dynamically induced polar stratospheric cooling is observed in the transition seasons over the NH, without any ozone deficit. The global temperature cooling values, compared with the control climate, are <semantics> 0.55 ± 0.03 </semantics> K in TOTC and <semantics> 0.39 ± 0.03 </semantics> K in SCUV. The reductions in total meridional heat transport outside of the subtropics are similar in the two experiments, especially in the SH. Despite substantial differences in stratospheric forcing, similarities exist between the two experiments, such as cloudiness; meridional heating transport in the SH; and strong cooling in the NH during wintertime, although this cooling affects two different regions, namely, North America in TOTC and the Euro–Asian continent in SCUV. Article in Journal/Newspaper polar night Directory of Open Access Journals: DOAJ Articles Climate 12 1 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
solar activity climate change projections global models Science Q |
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solar activity climate change projections global models Science Q Nazario Tartaglione Thomas Toniazzo Odd Helge Otterå Yvan Orsolini Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations |
topic_facet |
solar activity climate change projections global models Science Q |
description |
In this study, we use the Whole Atmosphere Community Climate Model, forced by present-day atmospheric composition and coupled to a Slab Ocean Model, to simulate the state of the climate under grand solar minimum forcing scenarios. Idealized experiments prescribe time-invariant solar irradiance reductions that are either uniform (percentage-wise) across the total solar radiation spectrum (TOTC) or spectrally localized in the ultraviolet (UV) band (SCUV). We compare the equilibrium condition of these experiments with the equilibrium condition of a control simulation, forced by perpetual solar maximum conditions. In SCUV, we observe large stratospheric cooling due to ozone reduction. In both the Northern Hemisphere (NH) and the Southern Hemisphere (SH), this is accompanied by a weakening of the polar night jet during the cold season. In TOTC, dynamically induced polar stratospheric cooling is observed in the transition seasons over the NH, without any ozone deficit. The global temperature cooling values, compared with the control climate, are <semantics> 0.55 ± 0.03 </semantics> K in TOTC and <semantics> 0.39 ± 0.03 </semantics> K in SCUV. The reductions in total meridional heat transport outside of the subtropics are similar in the two experiments, especially in the SH. Despite substantial differences in stratospheric forcing, similarities exist between the two experiments, such as cloudiness; meridional heating transport in the SH; and strong cooling in the NH during wintertime, although this cooling affects two different regions, namely, North America in TOTC and the Euro–Asian continent in SCUV. |
format |
Article in Journal/Newspaper |
author |
Nazario Tartaglione Thomas Toniazzo Odd Helge Otterå Yvan Orsolini |
author_facet |
Nazario Tartaglione Thomas Toniazzo Odd Helge Otterå Yvan Orsolini |
author_sort |
Nazario Tartaglione |
title |
Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations |
title_short |
Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations |
title_full |
Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations |
title_fullStr |
Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations |
title_full_unstemmed |
Equilibrium Climate after Spectral and Bolometric Irradiance Reduction in Grand Solar Minimum Simulations |
title_sort |
equilibrium climate after spectral and bolometric irradiance reduction in grand solar minimum simulations |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/cli12010001 https://doaj.org/article/1948a879a3254f198370c8965ab2027d |
genre |
polar night |
genre_facet |
polar night |
op_source |
Climate, Vol 12, Iss 1, p 1 (2023) |
op_relation |
https://www.mdpi.com/2225-1154/12/1/1 https://doaj.org/toc/2225-1154 doi:10.3390/cli12010001 2225-1154 https://doaj.org/article/1948a879a3254f198370c8965ab2027d |
op_doi |
https://doi.org/10.3390/cli12010001 |
container_title |
Climate |
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12 |
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1 |
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1 |
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1792053176195612672 |