Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming
The characteristics of tropical mesoscale convective systems (MCSs) simulated with a finer-resolution (similar to 50 km) version of the Geophysical Fluid Dynamics Laboratory (GFDL) AM4 model are evaluated by comparing with a comprehensive long-term observational dataset. It is shown that the model c...
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Online Access: | https://doi.org/10.1175/JCLI-D-20-0535.1 |
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ftncar:oai:drupal-site.org:articles_24516 2024-04-28T08:37:54+00:00 Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming Dong, Wenhao (author) Zhao, Ming (author) Ming, Yi (author) Ramaswamy, V. (author) 2021-07 https://doi.org/10.1175/JCLI-D-20-0535.1 en eng Journal of Climate--0894-8755--1520-0442 articles:24516 doi:10.1175/JCLI-D-20-0535.1 ark:/85065/d7pg1vwj Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2021 ftncar https://doi.org/10.1175/JCLI-D-20-0535.1 2024-04-04T17:33:50Z The characteristics of tropical mesoscale convective systems (MCSs) simulated with a finer-resolution (similar to 50 km) version of the Geophysical Fluid Dynamics Laboratory (GFDL) AM4 model are evaluated by comparing with a comprehensive long-term observational dataset. It is shown that the model can capture the various aspects of MCSs reasonably well. The simulated spatial distribution of MCSs is broadly in agreement with the observations. This is also true for seasonality and interannual variability over different land and oceanic regions. The simulated MCSs are generally longer-lived, weaker, and larger than observed. Despite these biases, an event-scale analysis suggests that their duration, intensity, and size are strongly correlated. Specifically, longer-lived and stronger events tend to be bigger, which is consistent with the observations. The same model is used to investigate the response of tropical MCSs to global warming using time-slice simulations forced by prescribed sea surface temperatures and sea ice. There is an overall decrease in occurrence frequency, and the reduction over land is more prominent than over ocean. NA16NWS4620043 NA18NWS4620043B Article in Journal/Newspaper Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Climate 1 40 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The characteristics of tropical mesoscale convective systems (MCSs) simulated with a finer-resolution (similar to 50 km) version of the Geophysical Fluid Dynamics Laboratory (GFDL) AM4 model are evaluated by comparing with a comprehensive long-term observational dataset. It is shown that the model can capture the various aspects of MCSs reasonably well. The simulated spatial distribution of MCSs is broadly in agreement with the observations. This is also true for seasonality and interannual variability over different land and oceanic regions. The simulated MCSs are generally longer-lived, weaker, and larger than observed. Despite these biases, an event-scale analysis suggests that their duration, intensity, and size are strongly correlated. Specifically, longer-lived and stronger events tend to be bigger, which is consistent with the observations. The same model is used to investigate the response of tropical MCSs to global warming using time-slice simulations forced by prescribed sea surface temperatures and sea ice. There is an overall decrease in occurrence frequency, and the reduction over land is more prominent than over ocean. NA16NWS4620043 NA18NWS4620043B |
author2 |
Dong, Wenhao (author) Zhao, Ming (author) Ming, Yi (author) Ramaswamy, V. (author) |
format |
Article in Journal/Newspaper |
title |
Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming |
spellingShingle |
Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming |
title_short |
Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming |
title_full |
Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming |
title_fullStr |
Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming |
title_full_unstemmed |
Representation of tropical mesoscale convective systems in a general circulation model: Climatology and response to global warming |
title_sort |
representation of tropical mesoscale convective systems in a general circulation model: climatology and response to global warming |
publishDate |
2021 |
url |
https://doi.org/10.1175/JCLI-D-20-0535.1 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Journal of Climate--0894-8755--1520-0442 articles:24516 doi:10.1175/JCLI-D-20-0535.1 ark:/85065/d7pg1vwj |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1175/JCLI-D-20-0535.1 |
container_title |
Journal of Climate |
container_start_page |
1 |
op_container_end_page |
40 |
_version_ |
1797569153959198720 |