Performance of the medium and high horizontal resolution models from HighResMIP-CMIP6 in simulating synoptic-scale cyclones over South America
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10491459" target="_blank" >RIV/00216208:11320/25:10491459 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=nkioaCWtaC" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=nkioaCWtaC</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00382-024-07579-3" target="_blank" >10.1007/s00382-024-07579-3</a>
Alternative languages
Result language
angličtina
Original language name
Performance of the medium and high horizontal resolution models from HighResMIP-CMIP6 in simulating synoptic-scale cyclones over South America
Original language description
The future behavior of synoptic-scale cyclones remains uncertain due to various factors; in terms of modeling it relies on the global climate models (GCMs) settings, such as their dynamical core, parameterizations, horizontal and vertical resolutions, etc. To cover one part of these examples, this study aims to understand how high (similar to 25/50 km) and medium (similar to 50/100 km) horizontal resolutions in HighResMIP-CMIP6 GCMs affect the climatology of cyclones over South America and southwestern South Atlantic Ocean. Present climate simulations of six GCMs are compared with CFSR and ERA5 reanalyses, the simulations reproduce the three main cyclogenetic regions near the eastern coast of South America very well. Nevertheless, high-resolution (HR) simulations slightly overestimate the frequency of cyclones compared to medium-resolution (MR) simulations. Models have smaller errors in simulating cyclone's intensity than lifecycle, since they overestimate the long-lived events. The centered composites reveal that synoptic patterns (mean sea level pressure, 10-m winds and precipitation) of the cyclones show more organized and stronger fields in the simulations than reanalyses, especially close to the cyclone's center. Mid-upper levels cyclogenesis mechanisms are well captured by simulations. While the differences between HR and MR composites are not visually pronounced, the Kling-Gupta efficiency (KGE) index indicates that HR performs better than MR in the representation of the cyclone spatial structures for almost all variables in all cyclogenetic regions. Although there are notable improvements in the HR simulations, synoptic-scale studies in South America using MR simulations (which are refined compared to most CMIP6 GCMs) can also be trustful.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Climate Dynamics
ISSN
0930-7575
e-ISSN
1432-0894
Volume of the periodical
63
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
23
Pages from-to
83
UT code for WoS article
001396257000001
EID of the result in the Scopus database
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