The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model
With a pair of high-resolution (HR, 10 km ocean and 25 km atm) and low-resolution (LR, 100 km ocean and 100 km atm) Community Earth System Model (CESM) simulations, we investigate and compare the long-term mean Northern Hemisphere (NH) wintertime storm tracks against reanalysis data. Based on severa...
Published in: | Journal of Advances in Modeling Earth Systems |
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Online Access: | https://doi.org/10.1029/2023MS003652 |
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ftncar:oai:drupal-site.org:articles_26787 2024-04-14T08:15:41+00:00 The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model Wang, Zhaoying (author) Li, Mingkui (author) Zhang, Shaoqing (author) Small, R. Justin (author) Lu, Lv (author) Yuan, Man (author) Yong, Jianlin (author) Lin, Xiaopei (author) Wu, Lixin (author) 2023-10-11 https://doi.org/10.1029/2023MS003652 en eng Journal of Advances in Modeling Earth Systems--J Adv Model Earth Syst--1942-2466--1942-2466 ERA5 monthly averaged data on pressure levels from 1979 to present--10.24381/cds.6860a573 lgan/cesm_sw_1.0.1: Some efforts on refactoring and optimizing the Community Earth System Model(CESM1.3.1) on the Sunway TaihuLight supercomputer--10.5281/zenodo.3637771 articles:26787 doi:10.1029/2023MS003652 ark:/85065/d76977mq Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2023 ftncar https://doi.org/10.1029/2023MS003652 2024-03-21T18:00:26Z With a pair of high-resolution (HR, 10 km ocean and 25 km atm) and low-resolution (LR, 100 km ocean and 100 km atm) Community Earth System Model (CESM) simulations, we investigate and compare the long-term mean Northern Hemisphere (NH) wintertime storm tracks against reanalysis data. Based on several Eulerian measures, the CESM-HR shows a poleward shift of the NH storm tracks and a reduced equatorward bias in the North Pacific relative to the CESM-LR. Those may be associated with the refined topography of the Tibetan Plateau as well as the improved subtropical jet, stationary planetary waves, atmospheric baroclinity, and baroclinic energy conversion over the North Pacific. We also find that sharper oceanic fronts along the Kuroshio Extension accompanied by enhanced local atmospheric baroclinity and strengthened eddy heat flux over the northern North Pacific could be related to those improvements. Nevertheless, the North Atlantic storm track in HR is placed too north, leading to a larger negative bias over the subtropical zone than in LR. The simulated insufficient subtropical sensible and latent heat fluxes and northward zonal winds in HR seemingly coincide with the deficits in the North Atlantic storm track. The stronger NH branch of the Hadley cell and its poleward expansion in HR may be linked to the changes in the tropical precipitation and the poleward shift of the NH storm tracks. Further studies of attributing these biases to a specific aspect of the climate model by sensitivity experiments are warranted for further clarification of the mechanisms. 30964 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Pacific Journal of Advances in Modeling Earth Systems 15 10 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
With a pair of high-resolution (HR, 10 km ocean and 25 km atm) and low-resolution (LR, 100 km ocean and 100 km atm) Community Earth System Model (CESM) simulations, we investigate and compare the long-term mean Northern Hemisphere (NH) wintertime storm tracks against reanalysis data. Based on several Eulerian measures, the CESM-HR shows a poleward shift of the NH storm tracks and a reduced equatorward bias in the North Pacific relative to the CESM-LR. Those may be associated with the refined topography of the Tibetan Plateau as well as the improved subtropical jet, stationary planetary waves, atmospheric baroclinity, and baroclinic energy conversion over the North Pacific. We also find that sharper oceanic fronts along the Kuroshio Extension accompanied by enhanced local atmospheric baroclinity and strengthened eddy heat flux over the northern North Pacific could be related to those improvements. Nevertheless, the North Atlantic storm track in HR is placed too north, leading to a larger negative bias over the subtropical zone than in LR. The simulated insufficient subtropical sensible and latent heat fluxes and northward zonal winds in HR seemingly coincide with the deficits in the North Atlantic storm track. The stronger NH branch of the Hadley cell and its poleward expansion in HR may be linked to the changes in the tropical precipitation and the poleward shift of the NH storm tracks. Further studies of attributing these biases to a specific aspect of the climate model by sensitivity experiments are warranted for further clarification of the mechanisms. 30964 |
author2 |
Wang, Zhaoying (author) Li, Mingkui (author) Zhang, Shaoqing (author) Small, R. Justin (author) Lu, Lv (author) Yuan, Man (author) Yong, Jianlin (author) Lin, Xiaopei (author) Wu, Lixin (author) |
format |
Article in Journal/Newspaper |
title |
The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model |
spellingShingle |
The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model |
title_short |
The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model |
title_full |
The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model |
title_fullStr |
The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model |
title_full_unstemmed |
The Northern Hemisphere wintertime storm track simulated in the high-resolution Community Earth System Model |
title_sort |
northern hemisphere wintertime storm track simulated in the high-resolution community earth system model |
publishDate |
2023 |
url |
https://doi.org/10.1029/2023MS003652 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Advances in Modeling Earth Systems--J Adv Model Earth Syst--1942-2466--1942-2466 ERA5 monthly averaged data on pressure levels from 1979 to present--10.24381/cds.6860a573 lgan/cesm_sw_1.0.1: Some efforts on refactoring and optimizing the Community Earth System Model(CESM1.3.1) on the Sunway TaihuLight supercomputer--10.5281/zenodo.3637771 articles:26787 doi:10.1029/2023MS003652 ark:/85065/d76977mq |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1029/2023MS003652 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
15 |
container_issue |
10 |
_version_ |
1796314098761203712 |