Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory
Climate model simulations of the PETM (Paleocene-Eocene Thermal Maximum) warming have mainly focused on replicating the global thermal response through greenhouse forcing, i.e. CO 2 , at levels compatible with observations. Comparatively less effort has gone into assessing the skill of models to rep...
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ftzenodo:oai:zenodo.org:4567325 2024-09-15T18:24:06+00:00 Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory Rush, William 2021-02-26 https://doi.org/10.7291/D1FQ18 unknown Zenodo https://doi.org/10.1016/j.palaeo.2021.110289 https://zenodo.org/communities/dryad https://doi.org/10.7291/D1FQ18 oai:zenodo.org:4567325 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode PETM runoff climate model CAM5 Mid Atlantic Pyrenees info:eu-repo/semantics/other 2021 ftzenodo https://doi.org/10.7291/D1FQ1810.1016/j.palaeo.2021.110289 2024-07-26T11:15:05Z Climate model simulations of the PETM (Paleocene-Eocene Thermal Maximum) warming have mainly focused on replicating the global thermal response through greenhouse forcing, i.e. CO 2 , at levels compatible with observations. Comparatively less effort has gone into assessing the skill of models to replicate the response of the hydrologic cycle to the warming, particularly on regional scales. Here we have assembled proxy records of regional precipitation, focusing on the Mid-Atlantic Coasts of North America (New Jersey) and Europe (Spain) to test the response of the hydrologic system to greenhouse gas forcing of the magnitude estimated for the PETM (i.e., 2x). Given evidence that the PETM initiated during a maximum in eccentricity, this includes the response under neutral and extreme orbital configurations. Modeled results show excellent agreement with observations in Northern Spain, with a significant increase in both mean annual and extreme precipitation resulting from increased CO 2 levels under a neutral orbit. The Mid Atlantic Coast simulations agree with observations showing increases in both overall and extreme precipitation as a result of CO 2 increases. In particular, the development of sustained atmospheric rivers might be significantly contributing to the extremes of the eastern Atlantic, whereas extratropical cyclones are likely contributing to the extremes in the western Atlantic. With an eccentric orbit that maximizes insolation during boreal summer, there is a suppression of precipitation in the eastern Atlantic and an amplification in the western Atlantic which may account for observations in the relative timing of the sedimentary response to the carbon isotope excursion associated with the PETM. Other/Unknown Material North Atlantic Zenodo |
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PETM runoff climate model CAM5 Mid Atlantic Pyrenees |
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PETM runoff climate model CAM5 Mid Atlantic Pyrenees Rush, William Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory |
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PETM runoff climate model CAM5 Mid Atlantic Pyrenees |
description |
Climate model simulations of the PETM (Paleocene-Eocene Thermal Maximum) warming have mainly focused on replicating the global thermal response through greenhouse forcing, i.e. CO 2 , at levels compatible with observations. Comparatively less effort has gone into assessing the skill of models to replicate the response of the hydrologic cycle to the warming, particularly on regional scales. Here we have assembled proxy records of regional precipitation, focusing on the Mid-Atlantic Coasts of North America (New Jersey) and Europe (Spain) to test the response of the hydrologic system to greenhouse gas forcing of the magnitude estimated for the PETM (i.e., 2x). Given evidence that the PETM initiated during a maximum in eccentricity, this includes the response under neutral and extreme orbital configurations. Modeled results show excellent agreement with observations in Northern Spain, with a significant increase in both mean annual and extreme precipitation resulting from increased CO 2 levels under a neutral orbit. The Mid Atlantic Coast simulations agree with observations showing increases in both overall and extreme precipitation as a result of CO 2 increases. In particular, the development of sustained atmospheric rivers might be significantly contributing to the extremes of the eastern Atlantic, whereas extratropical cyclones are likely contributing to the extremes in the western Atlantic. With an eccentric orbit that maximizes insolation during boreal summer, there is a suppression of precipitation in the eastern Atlantic and an amplification in the western Atlantic which may account for observations in the relative timing of the sedimentary response to the carbon isotope excursion associated with the PETM. |
format |
Other/Unknown Material |
author |
Rush, William |
author_facet |
Rush, William |
author_sort |
Rush, William |
title |
Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory |
title_short |
Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory |
title_full |
Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory |
title_fullStr |
Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory |
title_full_unstemmed |
Increased frequency of extreme precipitation events in the North Atlantic during the PETM: Observations and theory |
title_sort |
increased frequency of extreme precipitation events in the north atlantic during the petm: observations and theory |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.7291/D1FQ18 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.1016/j.palaeo.2021.110289 https://zenodo.org/communities/dryad https://doi.org/10.7291/D1FQ18 oai:zenodo.org:4567325 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.7291/D1FQ1810.1016/j.palaeo.2021.110289 |
_version_ |
1810464393636347904 |