Spatial patterns and intensity of the surface storm tracks in CMIP5 models
To improve the understanding of storm tracks and western boundary current (WBC) interactions, surface storm tracks in 12 CMIP5 models are examined against ERA-Interim. All models capture an equatorward displacement toward the WBCs in the locations of the surface storm tracks' maxima relative to...
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ftncar:oai:drupal-site.org:articles_19851 2023-09-05T13:21:38+02:00 Spatial patterns and intensity of the surface storm tracks in CMIP5 models Booth, James F. (author) Kwon, Young-Oh (author) Ko, Stanley (author) Small, R. Justin (author) Msadek, Rym (author) 2017-07 https://doi.org/10.1175/JCLI-D-16-0228.1 en eng Journal of Climate--J. Climate--0894-8755--1520-0442 articles:19851 ark:/85065/d7x63q80 doi:10.1175/JCLI-D-16-0228.1 Copyright 2017 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. article Text 2017 ftncar https://doi.org/10.1175/JCLI-D-16-0228.1 2023-08-14T18:47:28Z To improve the understanding of storm tracks and western boundary current (WBC) interactions, surface storm tracks in 12 CMIP5 models are examined against ERA-Interim. All models capture an equatorward displacement toward the WBCs in the locations of the surface storm tracks' maxima relative to those at 850 hPa. An estimated storm-track metric is developed to analyze the location of the surface storm track. It shows that the equatorward shift is influenced by both the lower-tropospheric instability and the baroclinicity. Basin-scale spatial correlations between models and ERA-Interim for the storm tracks, near-surface stability, SST gradient, and baroclinicity are calculated to test the ability of the GCMs' match reanalysis. An intermodel comparison of the spatial correlations suggests that differences (relative to ERA-Interim) in the position of the storm track aloft have the strongest influence on differences in the surface storm-track position. However, in the North Atlantic, biases in the surface storm track north of the Gulf Stream are related to biases in the SST. An analysis of the strength of the storm tracks shows that most models generate a weaker storm track at the surface than 850 hPa, consistent with observations, although some outliers are found. A linear relationship exists among the models between storm-track amplitudes at 500 and 850 hPa, but not between 850 hPa and the surface. In total, the work reveals a dual role in forcing the surface storm track from aloft and from the ocean surface in CMIP5 models, with the atmosphere having the larger relative influence. DE-SC0006743 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Climate 30 13 4965 4981 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
To improve the understanding of storm tracks and western boundary current (WBC) interactions, surface storm tracks in 12 CMIP5 models are examined against ERA-Interim. All models capture an equatorward displacement toward the WBCs in the locations of the surface storm tracks' maxima relative to those at 850 hPa. An estimated storm-track metric is developed to analyze the location of the surface storm track. It shows that the equatorward shift is influenced by both the lower-tropospheric instability and the baroclinicity. Basin-scale spatial correlations between models and ERA-Interim for the storm tracks, near-surface stability, SST gradient, and baroclinicity are calculated to test the ability of the GCMs' match reanalysis. An intermodel comparison of the spatial correlations suggests that differences (relative to ERA-Interim) in the position of the storm track aloft have the strongest influence on differences in the surface storm-track position. However, in the North Atlantic, biases in the surface storm track north of the Gulf Stream are related to biases in the SST. An analysis of the strength of the storm tracks shows that most models generate a weaker storm track at the surface than 850 hPa, consistent with observations, although some outliers are found. A linear relationship exists among the models between storm-track amplitudes at 500 and 850 hPa, but not between 850 hPa and the surface. In total, the work reveals a dual role in forcing the surface storm track from aloft and from the ocean surface in CMIP5 models, with the atmosphere having the larger relative influence. DE-SC0006743 |
author2 |
Booth, James F. (author) Kwon, Young-Oh (author) Ko, Stanley (author) Small, R. Justin (author) Msadek, Rym (author) |
format |
Article in Journal/Newspaper |
title |
Spatial patterns and intensity of the surface storm tracks in CMIP5 models |
spellingShingle |
Spatial patterns and intensity of the surface storm tracks in CMIP5 models |
title_short |
Spatial patterns and intensity of the surface storm tracks in CMIP5 models |
title_full |
Spatial patterns and intensity of the surface storm tracks in CMIP5 models |
title_fullStr |
Spatial patterns and intensity of the surface storm tracks in CMIP5 models |
title_full_unstemmed |
Spatial patterns and intensity of the surface storm tracks in CMIP5 models |
title_sort |
spatial patterns and intensity of the surface storm tracks in cmip5 models |
publishDate |
2017 |
url |
https://doi.org/10.1175/JCLI-D-16-0228.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Climate--J. Climate--0894-8755--1520-0442 articles:19851 ark:/85065/d7x63q80 doi:10.1175/JCLI-D-16-0228.1 |
op_rights |
Copyright 2017 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JCLI-D-16-0228.1 |
container_title |
Journal of Climate |
container_volume |
30 |
container_issue |
13 |
container_start_page |
4965 |
op_container_end_page |
4981 |
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1776202233366446080 |