Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model
Orbital forcing does not only exert direct insolation effects, but also alters climate indirectly through feedback mechanisms that modify atmosphere and ocean dynamics and meridional heat and moisture transfers. We investigate the regional effects of these changes by detailed analysis of atmosphere...
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ftcopernicus:oai:publications.copernicus.org:cp1940 2023-05-15T17:24:21+02:00 Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model Fischer, N. Jungclaus, J. H. 2018-09-27 application/pdf https://doi.org/10.5194/cp-6-155-2010 https://cp.copernicus.org/articles/6/155/2010/ eng eng doi:10.5194/cp-6-155-2010 https://cp.copernicus.org/articles/6/155/2010/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-6-155-2010 2020-07-20T16:26:27Z Orbital forcing does not only exert direct insolation effects, but also alters climate indirectly through feedback mechanisms that modify atmosphere and ocean dynamics and meridional heat and moisture transfers. We investigate the regional effects of these changes by detailed analysis of atmosphere and ocean circulation and heat transports in a coupled atmosphere-ocean-sea ice-biosphere general circulation model (ECHAM5/JSBACH/MPI-OM). We perform long term quasi equilibrium simulations under pre-industrial, mid-Holocene (6000 years before present – yBP), and Eemian (125 000 yBP) orbital boundary conditions. Compared to pre-industrial climate, Eemian and Holocene temperatures show generally warmer conditions at higher and cooler conditions at lower latitudes. Changes in sea-ice cover, ocean heat transports, and atmospheric circulation patterns lead to pronounced regional heterogeneity. Over Europe, the warming is most pronounced over the north-eastern part in accordance with recent reconstructions for the Holocene. We attribute this warming to enhanced ocean circulation in the Nordic Seas and enhanced ocean-atmosphere heat flux over the Barents Shelf in conduction with retreat of sea ice and intensified winter storm tracks over northern Europe. Text Nordic Seas Sea ice Copernicus Publications: E-Journals Climate of the Past 6 2 155 168 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Orbital forcing does not only exert direct insolation effects, but also alters climate indirectly through feedback mechanisms that modify atmosphere and ocean dynamics and meridional heat and moisture transfers. We investigate the regional effects of these changes by detailed analysis of atmosphere and ocean circulation and heat transports in a coupled atmosphere-ocean-sea ice-biosphere general circulation model (ECHAM5/JSBACH/MPI-OM). We perform long term quasi equilibrium simulations under pre-industrial, mid-Holocene (6000 years before present – yBP), and Eemian (125 000 yBP) orbital boundary conditions. Compared to pre-industrial climate, Eemian and Holocene temperatures show generally warmer conditions at higher and cooler conditions at lower latitudes. Changes in sea-ice cover, ocean heat transports, and atmospheric circulation patterns lead to pronounced regional heterogeneity. Over Europe, the warming is most pronounced over the north-eastern part in accordance with recent reconstructions for the Holocene. We attribute this warming to enhanced ocean circulation in the Nordic Seas and enhanced ocean-atmosphere heat flux over the Barents Shelf in conduction with retreat of sea ice and intensified winter storm tracks over northern Europe. |
format |
Text |
author |
Fischer, N. Jungclaus, J. H. |
spellingShingle |
Fischer, N. Jungclaus, J. H. Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model |
author_facet |
Fischer, N. Jungclaus, J. H. |
author_sort |
Fischer, N. |
title |
Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model |
title_short |
Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model |
title_full |
Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model |
title_fullStr |
Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model |
title_full_unstemmed |
Effects of orbital forcing on atmosphere and ocean heat transports in Holocene and Eemian climate simulations with a comprehensive Earth system model |
title_sort |
effects of orbital forcing on atmosphere and ocean heat transports in holocene and eemian climate simulations with a comprehensive earth system model |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-6-155-2010 https://cp.copernicus.org/articles/6/155/2010/ |
genre |
Nordic Seas Sea ice |
genre_facet |
Nordic Seas Sea ice |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-6-155-2010 https://cp.copernicus.org/articles/6/155/2010/ |
op_doi |
https://doi.org/10.5194/cp-6-155-2010 |
container_title |
Climate of the Past |
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6 |
container_issue |
2 |
container_start_page |
155 |
op_container_end_page |
168 |
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1766115327566938112 |