Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5
This study investigates the sensitivity of the boreal winter prediction skill of Community Atmosphere Model 5 to the choice of the dynamical core. Both finite volume (FV) and spectral element (SE) dynamical cores are tested. An additional FV with the SE topography (FV _SE ) is also conducted to isol...
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ftdoajarticles:oai:doaj.org/article:0831e2d14e8a4470ac41e4faeef13380 2024-01-14T10:09:09+01:00 Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 Ha-Rim Kim Baek-Min Kim Yong-Sang Choi Sang-Yoon Jun Seok-Woo Son 2023-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ad0fbf https://doaj.org/article/0831e2d14e8a4470ac41e4faeef13380 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ad0fbf https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ad0fbf 1748-9326 https://doaj.org/article/0831e2d14e8a4470ac41e4faeef13380 Environmental Research Letters, Vol 19, Iss 1, p 014019 (2023) dynamical core seasonal predictability boreal-winter climate Community Atmosphere Model 5 Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2023 ftdoajarticles https://doi.org/10.1088/1748-9326/ad0fbf 2023-12-17T01:46:48Z This study investigates the sensitivity of the boreal winter prediction skill of Community Atmosphere Model 5 to the choice of the dynamical core. Both finite volume (FV) and spectral element (SE) dynamical cores are tested. An additional FV with the SE topography (FV _SE ) is also conducted to isolate the possible influence of the topography. The three dynamical core experiments, which ran from 2001/2002–2017/2018, are validated using Japanese 55 year reanalysis data. It turns out that the SE (−4.27 °C) has a smaller cold bias in boreal-winter surface air temperature (SAT) than the FV (−5.17 °C) and FV _SE (−5.29 °C), particularly in North America, East Asia, and Southern Europe/Northern Africa. Significant North Atlantic Oscillation-like biases are also identified in the mid-troposphere. These biases affect seasonal prediction skills. Although the overall prediction skills of boreal-winter SAT, quantified by the anomaly correlation coefficient (ACC), and root-mean-square error (RMSE), are reasonably good (ACC = 0.40 and RMSE = 0.47 in the mean values of SE, FV, and FV _SE ), they significantly differ from one region to another, depending on the choice of dynamical cores. For North America and Southern Europe/Northern Africa, SE shows better skills than FV _SE and FV. Conversely, in East Asia, FV and FV _SE outperform SE. These results suggest that the appropriate choice of the dynamical cores and the bottom boundary conditions could improve the boreal-winter seasonal prediction on a regional scale. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Environmental Research Letters 19 1 014019 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
dynamical core seasonal predictability boreal-winter climate Community Atmosphere Model 5 Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
dynamical core seasonal predictability boreal-winter climate Community Atmosphere Model 5 Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Ha-Rim Kim Baek-Min Kim Yong-Sang Choi Sang-Yoon Jun Seok-Woo Son Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 |
topic_facet |
dynamical core seasonal predictability boreal-winter climate Community Atmosphere Model 5 Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
This study investigates the sensitivity of the boreal winter prediction skill of Community Atmosphere Model 5 to the choice of the dynamical core. Both finite volume (FV) and spectral element (SE) dynamical cores are tested. An additional FV with the SE topography (FV _SE ) is also conducted to isolate the possible influence of the topography. The three dynamical core experiments, which ran from 2001/2002–2017/2018, are validated using Japanese 55 year reanalysis data. It turns out that the SE (−4.27 °C) has a smaller cold bias in boreal-winter surface air temperature (SAT) than the FV (−5.17 °C) and FV _SE (−5.29 °C), particularly in North America, East Asia, and Southern Europe/Northern Africa. Significant North Atlantic Oscillation-like biases are also identified in the mid-troposphere. These biases affect seasonal prediction skills. Although the overall prediction skills of boreal-winter SAT, quantified by the anomaly correlation coefficient (ACC), and root-mean-square error (RMSE), are reasonably good (ACC = 0.40 and RMSE = 0.47 in the mean values of SE, FV, and FV _SE ), they significantly differ from one region to another, depending on the choice of dynamical cores. For North America and Southern Europe/Northern Africa, SE shows better skills than FV _SE and FV. Conversely, in East Asia, FV and FV _SE outperform SE. These results suggest that the appropriate choice of the dynamical cores and the bottom boundary conditions could improve the boreal-winter seasonal prediction on a regional scale. |
format |
Article in Journal/Newspaper |
author |
Ha-Rim Kim Baek-Min Kim Yong-Sang Choi Sang-Yoon Jun Seok-Woo Son |
author_facet |
Ha-Rim Kim Baek-Min Kim Yong-Sang Choi Sang-Yoon Jun Seok-Woo Son |
author_sort |
Ha-Rim Kim |
title |
Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 |
title_short |
Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 |
title_full |
Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 |
title_fullStr |
Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 |
title_full_unstemmed |
Difference in boreal winter predictability between two dynamical cores of Community Atmosphere Model 5 |
title_sort |
difference in boreal winter predictability between two dynamical cores of community atmosphere model 5 |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
https://doi.org/10.1088/1748-9326/ad0fbf https://doaj.org/article/0831e2d14e8a4470ac41e4faeef13380 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Environmental Research Letters, Vol 19, Iss 1, p 014019 (2023) |
op_relation |
https://doi.org/10.1088/1748-9326/ad0fbf https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ad0fbf 1748-9326 https://doaj.org/article/0831e2d14e8a4470ac41e4faeef13380 |
op_doi |
https://doi.org/10.1088/1748-9326/ad0fbf |
container_title |
Environmental Research Letters |
container_volume |
19 |
container_issue |
1 |
container_start_page |
014019 |
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1788063619309633536 |