Representation of modes of variability in six U.S. climate models
We compare the performance of several modes of variability across six U.S. climate modeling groups, with a focus on identifying robust improvements in recent models [including those participating in phase 6 of the Coupled Model Intercomparison Project (CMIP)] compared to previous versions. In partic...
Published in: | Journal of Climate |
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Language: | English |
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2020
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Online Access: | https://doi.org/10.1175/JCLI-D-19-0956.1 |
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ftncar:oai:drupal-site.org:articles_24042 2024-04-28T08:30:51+00:00 Representation of modes of variability in six U.S. climate models Orbe, Clara (author) Van Roekel, Luke (author) Adames, Ángel F. (author) Dezfuli, Amin (author) Fasullo, John (author) Gleckler, Peter J. (author) Lee, Jiwoo (author) Li, Wei (author) Nazarenko, Larissa (author) Schmidt, Gavin A. (author) Sperber, Kenneth R. (author) Zhao, Ming (author) 2020-07 https://doi.org/10.1175/JCLI-D-19-0956.1 en eng Journal of Climate--0894-8755--1520-0442 articles:24042 ark:/85065/d76t0r1t doi:10.1175/JCLI-D-19-0956.1 Copyright 2020 American Meteorological Society (AMS). article Text 2020 ftncar https://doi.org/10.1175/JCLI-D-19-0956.1 2024-04-04T17:34:52Z We compare the performance of several modes of variability across six U.S. climate modeling groups, with a focus on identifying robust improvements in recent models [including those participating in phase 6 of the Coupled Model Intercomparison Project (CMIP)] compared to previous versions. In particular, we examine the representation of the Madden–Julian oscillation (MJO), El Niño–Southern Oscillation (ENSO), the Pacific decadal oscillation (PDO), the quasi-biennial oscillation (QBO) in the tropical stratosphere, and the dominant modes of extratropical variability, including the southern annular mode (SAM), the northern annular mode (NAM) [and the closely related North Atlantic Oscillation (NAO)], and the Pacific–North American pattern (PNA). Where feasible, we explore the processes driving these improvements through the use of “intermediary” experiments that utilize model versions between CMIP3/5 and CMIP6 as well as targeted sensitivity experiments in which individual modeling parameters are altered. We find clear and systematic improvements in the MJO and QBO and in the teleconnection patterns associated with the PDO and ENSO. Some gains arise from better process representation, while others (e.g., the QBO) from higher resolution that allows for a greater range of interactions. Our results demonstrate that the incremental development processes in multiple climate model groups lead to more realistic simulations over time. 1852977 Article in Journal/Newspaper North Atlantic North Atlantic oscillation OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Climate 33 17 7591 7617 |
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Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
We compare the performance of several modes of variability across six U.S. climate modeling groups, with a focus on identifying robust improvements in recent models [including those participating in phase 6 of the Coupled Model Intercomparison Project (CMIP)] compared to previous versions. In particular, we examine the representation of the Madden–Julian oscillation (MJO), El Niño–Southern Oscillation (ENSO), the Pacific decadal oscillation (PDO), the quasi-biennial oscillation (QBO) in the tropical stratosphere, and the dominant modes of extratropical variability, including the southern annular mode (SAM), the northern annular mode (NAM) [and the closely related North Atlantic Oscillation (NAO)], and the Pacific–North American pattern (PNA). Where feasible, we explore the processes driving these improvements through the use of “intermediary” experiments that utilize model versions between CMIP3/5 and CMIP6 as well as targeted sensitivity experiments in which individual modeling parameters are altered. We find clear and systematic improvements in the MJO and QBO and in the teleconnection patterns associated with the PDO and ENSO. Some gains arise from better process representation, while others (e.g., the QBO) from higher resolution that allows for a greater range of interactions. Our results demonstrate that the incremental development processes in multiple climate model groups lead to more realistic simulations over time. 1852977 |
author2 |
Orbe, Clara (author) Van Roekel, Luke (author) Adames, Ángel F. (author) Dezfuli, Amin (author) Fasullo, John (author) Gleckler, Peter J. (author) Lee, Jiwoo (author) Li, Wei (author) Nazarenko, Larissa (author) Schmidt, Gavin A. (author) Sperber, Kenneth R. (author) Zhao, Ming (author) |
format |
Article in Journal/Newspaper |
title |
Representation of modes of variability in six U.S. climate models |
spellingShingle |
Representation of modes of variability in six U.S. climate models |
title_short |
Representation of modes of variability in six U.S. climate models |
title_full |
Representation of modes of variability in six U.S. climate models |
title_fullStr |
Representation of modes of variability in six U.S. climate models |
title_full_unstemmed |
Representation of modes of variability in six U.S. climate models |
title_sort |
representation of modes of variability in six u.s. climate models |
publishDate |
2020 |
url |
https://doi.org/10.1175/JCLI-D-19-0956.1 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Journal of Climate--0894-8755--1520-0442 articles:24042 ark:/85065/d76t0r1t doi:10.1175/JCLI-D-19-0956.1 |
op_rights |
Copyright 2020 American Meteorological Society (AMS). |
op_doi |
https://doi.org/10.1175/JCLI-D-19-0956.1 |
container_title |
Journal of Climate |
container_volume |
33 |
container_issue |
17 |
container_start_page |
7591 |
op_container_end_page |
7617 |
_version_ |
1797588567846813696 |