Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme
The Goddard Earth Observing System version 5 (GEOS-5) global climate model with a 50-km horizontal resolution is forced by observed sea surface temperature (SST) to examine the fidelity of the seasonal-mean and inter-annual variation of tropical cyclones (TCs) in the western North Pacific (WNP) and...
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Online Access: | https://scholarworks.unist.ac.kr/handle/201301/26912 https://doi.org/10.1002/joc.6058 https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.6058 |
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ftuisanist:oai:scholarworks.unist.ac.kr:201301/26912 2023-05-15T17:34:26+02:00 Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme Seo, Eunkyo Lee, Myong-In Kim, Dongmin Lim, Young???Kwon Schubert, Siegfried D. Kim, Kyu???Myong 2019-08 https://scholarworks.unist.ac.kr/handle/201301/26912 https://doi.org/10.1002/joc.6058 https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.6058 ?????? unknown John Wiley and Sons Ltd INTERNATIONAL JOURNAL OF CLIMATOLOGY, v.39, no.10, pp.4041 - 4057 0899-8418 https://scholarworks.unist.ac.kr/handle/201301/26912 32663 2-s2.0-85063256184 000479031900011 doi:10.1002/joc.6058 https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.6058 ARTICLE ART 2019 ftuisanist https://doi.org/10.1002/joc.6058 2022-05-15T05:32:53Z The Goddard Earth Observing System version 5 (GEOS-5) global climate model with a 50-km horizontal resolution is forced by observed sea surface temperature (SST) to examine the fidelity of the seasonal-mean and inter-annual variation of tropical cyclones (TCs) in the western North Pacific (WNP) and the North Atlantic (NATL). The standard Relaxed Arakawa Schubert (RAS) deep convection scheme is modified to improve the representation of TCs, where the scheme implements a stochastic limit of the cumulus entrainment rate. The modification drives mid- and upper-tropospheric cooling and low- to mid-tropospheric drying in the background state, which tends to increase atmospheric instability. This enables the model to increase convective variability on an intra-seasonal timescale and improve the simulation of intense storms. Five-member ensemble runs with the modified RAS scheme for 12 years (1998???2009) exhibit realistic spatial distributions in the climatological-mean TC development area and their pathways over WNP and NATL. The GCM is able to reproduce the inter-annual variation of accumulated cyclone energy (ACE) by prescribing yearly varying observed SST even though the individual TC intensity is still underpredicted. A sensitivity of TC activity to El Ni??o???Southern Oscillation (ENSO) phase is also reproduced realistically over WNP in terms of the spatial pattern changes in the main development region and TC pathways. However, the model exhibits a notable deficiency in NATL in reproducing the observed inter-annual variation of TC activity and the sensitivity to the ENSO. Article in Journal/Newspaper North Atlantic ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) Pacific International Journal of Climatology 39 10 4041 4057 |
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Open Polar |
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ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) |
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ftuisanist |
language |
unknown |
description |
The Goddard Earth Observing System version 5 (GEOS-5) global climate model with a 50-km horizontal resolution is forced by observed sea surface temperature (SST) to examine the fidelity of the seasonal-mean and inter-annual variation of tropical cyclones (TCs) in the western North Pacific (WNP) and the North Atlantic (NATL). The standard Relaxed Arakawa Schubert (RAS) deep convection scheme is modified to improve the representation of TCs, where the scheme implements a stochastic limit of the cumulus entrainment rate. The modification drives mid- and upper-tropospheric cooling and low- to mid-tropospheric drying in the background state, which tends to increase atmospheric instability. This enables the model to increase convective variability on an intra-seasonal timescale and improve the simulation of intense storms. Five-member ensemble runs with the modified RAS scheme for 12 years (1998???2009) exhibit realistic spatial distributions in the climatological-mean TC development area and their pathways over WNP and NATL. The GCM is able to reproduce the inter-annual variation of accumulated cyclone energy (ACE) by prescribing yearly varying observed SST even though the individual TC intensity is still underpredicted. A sensitivity of TC activity to El Ni??o???Southern Oscillation (ENSO) phase is also reproduced realistically over WNP in terms of the spatial pattern changes in the main development region and TC pathways. However, the model exhibits a notable deficiency in NATL in reproducing the observed inter-annual variation of TC activity and the sensitivity to the ENSO. |
format |
Article in Journal/Newspaper |
author |
Seo, Eunkyo Lee, Myong-In Kim, Dongmin Lim, Young???Kwon Schubert, Siegfried D. Kim, Kyu???Myong |
spellingShingle |
Seo, Eunkyo Lee, Myong-In Kim, Dongmin Lim, Young???Kwon Schubert, Siegfried D. Kim, Kyu???Myong Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme |
author_facet |
Seo, Eunkyo Lee, Myong-In Kim, Dongmin Lim, Young???Kwon Schubert, Siegfried D. Kim, Kyu???Myong |
author_sort |
Seo, Eunkyo |
title |
Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme |
title_short |
Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme |
title_full |
Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme |
title_fullStr |
Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme |
title_full_unstemmed |
Inter-annual variation of tropical cyclones simulated by GEOS-5 AGCM with modified convection scheme |
title_sort |
inter-annual variation of tropical cyclones simulated by geos-5 agcm with modified convection scheme |
publisher |
John Wiley and Sons Ltd |
publishDate |
2019 |
url |
https://scholarworks.unist.ac.kr/handle/201301/26912 https://doi.org/10.1002/joc.6058 https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.6058 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
INTERNATIONAL JOURNAL OF CLIMATOLOGY, v.39, no.10, pp.4041 - 4057 0899-8418 https://scholarworks.unist.ac.kr/handle/201301/26912 32663 2-s2.0-85063256184 000479031900011 doi:10.1002/joc.6058 https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.6058 |
op_doi |
https://doi.org/10.1002/joc.6058 |
container_title |
International Journal of Climatology |
container_volume |
39 |
container_issue |
10 |
container_start_page |
4041 |
op_container_end_page |
4057 |
_version_ |
1766133275614511104 |