Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models
Teleconnection patterns associated with the Madden-Julian oscillation (MJO) significantly alter extra-tropical circulations, impacting weather and climate phenomena such as blocking, monsoons, the North Atlantic Oscillation, and the Pacific-North American pattern. However, the MJO has been extremely...
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ftseoulnuniv:oai:s-space.snu.ac.kr:10371/206705 2024-09-15T18:24:06+00:00 Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models Henderson, Stephanie A. Maloney, Eric D. Son, Seok-Woo Son, Seok-Woo 2018-06-23 https://hdl.handle.net/10371/206705 https://doi.org/10.1175/JCLI-D-16-0789.1 영어 unknown American Meteorological Society Journal of Climate, Vol.30 No.12, pp.4567-4587 0894-8755 https://hdl.handle.net/10371/206705 doi:10.1175/JCLI-D-16-0789.1 000402379600014 2-s2.0-85020055353 37751 ROSSBY-WAVE PROPAGATION NORTHERN WINTER INTRASEASONAL VARIABILITY SIMULATION DIAGNOSTICS CLIMATE MODELS ATMOSPHERE PRECIPITATION ANOMALIES SENSITIVITY MECHANISMS General circulation models Madden-Julian oscillation Teleconnections Article ART 2018 ftseoulnuniv https://doi.org/10.1175/JCLI-D-16-0789.1 2024-08-13T23:46:33Z Teleconnection patterns associated with the Madden-Julian oscillation (MJO) significantly alter extra-tropical circulations, impacting weather and climate phenomena such as blocking, monsoons, the North Atlantic Oscillation, and the Pacific-North American pattern. However, the MJO has been extremely difficult to simulate in many general circulation models (GCMs), and many GCMs contain large biases in the background flow, presenting challenges to the simulation of MJO teleconnection patterns and associated extra-tropical impacts. In this study, the database from phase 5 of the Coupled Model Intercomparison Project (CMIP5) is used to assess the impact of model MJO and basic state quality on MJO teleconnection pattern quality, and a simple dry linear baroclinic model is employed to understand the results. Even in GCMs assessed to have good MJOs, large biases in the MJO teleconnection patterns are produced as a result of errors in the zonal extent of the Pacific subtropical jet. The horizontal structure of Indo-Pacific MJO heating in good MJO models is found to have modest impacts on the teleconnection pattern skill, in agreement with previous studies that have demonstrated little sensitivity to the location of tropical heating near the subtropical jet. However, MJO heating east of the date line can alter the teleconnection pathways over North America. Results show that GCMs with poor basic states can have equally low skill in reproducing the MJO teleconnection patterns as GCMs with poor MJO quality, suggesting that both the basic state and the MJO must be well represented in order to reproduce the correct teleconnection patterns. Y 1 Article in Journal/Newspaper North Atlantic North Atlantic oscillation Seoul National University: S-Space Journal of Climate 30 12 4567 4587 |
institution |
Open Polar |
collection |
Seoul National University: S-Space |
op_collection_id |
ftseoulnuniv |
language |
unknown |
topic |
ROSSBY-WAVE PROPAGATION NORTHERN WINTER INTRASEASONAL VARIABILITY SIMULATION DIAGNOSTICS CLIMATE MODELS ATMOSPHERE PRECIPITATION ANOMALIES SENSITIVITY MECHANISMS General circulation models Madden-Julian oscillation Teleconnections |
spellingShingle |
ROSSBY-WAVE PROPAGATION NORTHERN WINTER INTRASEASONAL VARIABILITY SIMULATION DIAGNOSTICS CLIMATE MODELS ATMOSPHERE PRECIPITATION ANOMALIES SENSITIVITY MECHANISMS General circulation models Madden-Julian oscillation Teleconnections Henderson, Stephanie A. Maloney, Eric D. Son, Seok-Woo Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models |
topic_facet |
ROSSBY-WAVE PROPAGATION NORTHERN WINTER INTRASEASONAL VARIABILITY SIMULATION DIAGNOSTICS CLIMATE MODELS ATMOSPHERE PRECIPITATION ANOMALIES SENSITIVITY MECHANISMS General circulation models Madden-Julian oscillation Teleconnections |
description |
Teleconnection patterns associated with the Madden-Julian oscillation (MJO) significantly alter extra-tropical circulations, impacting weather and climate phenomena such as blocking, monsoons, the North Atlantic Oscillation, and the Pacific-North American pattern. However, the MJO has been extremely difficult to simulate in many general circulation models (GCMs), and many GCMs contain large biases in the background flow, presenting challenges to the simulation of MJO teleconnection patterns and associated extra-tropical impacts. In this study, the database from phase 5 of the Coupled Model Intercomparison Project (CMIP5) is used to assess the impact of model MJO and basic state quality on MJO teleconnection pattern quality, and a simple dry linear baroclinic model is employed to understand the results. Even in GCMs assessed to have good MJOs, large biases in the MJO teleconnection patterns are produced as a result of errors in the zonal extent of the Pacific subtropical jet. The horizontal structure of Indo-Pacific MJO heating in good MJO models is found to have modest impacts on the teleconnection pattern skill, in agreement with previous studies that have demonstrated little sensitivity to the location of tropical heating near the subtropical jet. However, MJO heating east of the date line can alter the teleconnection pathways over North America. Results show that GCMs with poor basic states can have equally low skill in reproducing the MJO teleconnection patterns as GCMs with poor MJO quality, suggesting that both the basic state and the MJO must be well represented in order to reproduce the correct teleconnection patterns. Y 1 |
author2 |
Son, Seok-Woo |
format |
Article in Journal/Newspaper |
author |
Henderson, Stephanie A. Maloney, Eric D. Son, Seok-Woo |
author_facet |
Henderson, Stephanie A. Maloney, Eric D. Son, Seok-Woo |
author_sort |
Henderson, Stephanie A. |
title |
Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models |
title_short |
Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models |
title_full |
Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models |
title_fullStr |
Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models |
title_full_unstemmed |
Madden-Julian Oscillation Pacific Teleconnections: The Impact of the Basic State and MJO Representation in General Circulation Models |
title_sort |
madden-julian oscillation pacific teleconnections: the impact of the basic state and mjo representation in general circulation models |
publisher |
American Meteorological Society |
publishDate |
2018 |
url |
https://hdl.handle.net/10371/206705 https://doi.org/10.1175/JCLI-D-16-0789.1 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Journal of Climate, Vol.30 No.12, pp.4567-4587 0894-8755 https://hdl.handle.net/10371/206705 doi:10.1175/JCLI-D-16-0789.1 000402379600014 2-s2.0-85020055353 37751 |
op_doi |
https://doi.org/10.1175/JCLI-D-16-0789.1 |
container_title |
Journal of Climate |
container_volume |
30 |
container_issue |
12 |
container_start_page |
4567 |
op_container_end_page |
4587 |
_version_ |
1810464397494059008 |