Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions
A strong positive correlation exists between mesoscale sea surface temperature (SST) and surface wind stress perturbations in the extratropical oceans, which is revealed by high-resolution satellite but is difficult to be accurately simulated in low-resolution coupled ocean-atmosphere models. The ex...
Published in: | Journal of Advances in Modeling Earth Systems |
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Online Access: | http://ir.qdio.ac.cn/handle/337002/177652 https://doi.org/10.1029/2021MS002822 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/177652 2023-05-15T18:25:53+02:00 Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions Tang, Zhijia Zhang, Rong-Hua Wang, Hongna Zhang, Shaoqing Wang, Hong 2021-12-01 http://ir.qdio.ac.cn/handle/337002/177652 https://doi.org/10.1029/2021MS002822 英语 eng AMER GEOPHYSICAL UNION JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS http://ir.qdio.ac.cn/handle/337002/177652 doi:10.1029/2021MS002822 mesoscale coupling atmospheric response mechanisms high-resolution climate model the Kuroshio Extensions (KE) the Agulhas Return Current (ARC) Meteorology & Atmospheric Sciences NUMERICAL WEATHER PREDICTION AIR-SEA INTERACTION LOW-LEVEL WINDS KUROSHIO EXTENSION SATELLITE-OBSERVATIONS ATMOSPHERIC RESPONSE FLUX MEASUREMENTS SOUTHERN-OCEAN TEMPERATURE STRESS 期刊论文 2021 ftchinacasciocas https://doi.org/10.1029/2021MS002822 2022-06-27T05:46:39Z A strong positive correlation exists between mesoscale sea surface temperature (SST) and surface wind stress perturbations in the extratropical oceans, which is revealed by high-resolution satellite but is difficult to be accurately simulated in low-resolution coupled ocean-atmosphere models. The extent to which the mesoscale coupling is captured in a high-resolution Community Earth System Model (CESM-HR) is assessed in this study, with a focus on two regions, the Kuroshio Extensions (KE) and Agulhas Return Current (ARC), respectively. Compared with satellite observations, it is found that the CESM-HR can well depict the characteristics of the mesoscale air-sea coupling, with its strength being comparable to that observed; but in the KE region, the simulated strength is only half of the observed during summer. Mechanisms for the atmospheric responses to mesoscale SST perturbations through the pressure adjustment (PA) and the downward momentum transport (DMT) are analyzed. The results highlight different mechanisms for controlling the atmospheric responses over the KE and ARC regions, which are regionally and seasonally dependent. In the ARC region, pronounced dipole patterns of sea surface pressure (SLP) and vertical velocity perturbation responses indicate that the DMT exerts a dominant effect in both winter and summer. In the KE region, monopole patterns show the main role played by the PA mechanism for the atmospheric adjustment in summer, while dipole patterns indicate the main role played by the DMT mechanism in winter. The weak coupling strength in summer over the KE is closely related to the inadequate parameterization of vertical heat mixing. Report Southern Ocean Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Southern Ocean Journal of Advances in Modeling Earth Systems 13 12 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
mesoscale coupling atmospheric response mechanisms high-resolution climate model the Kuroshio Extensions (KE) the Agulhas Return Current (ARC) Meteorology & Atmospheric Sciences NUMERICAL WEATHER PREDICTION AIR-SEA INTERACTION LOW-LEVEL WINDS KUROSHIO EXTENSION SATELLITE-OBSERVATIONS ATMOSPHERIC RESPONSE FLUX MEASUREMENTS SOUTHERN-OCEAN TEMPERATURE STRESS |
spellingShingle |
mesoscale coupling atmospheric response mechanisms high-resolution climate model the Kuroshio Extensions (KE) the Agulhas Return Current (ARC) Meteorology & Atmospheric Sciences NUMERICAL WEATHER PREDICTION AIR-SEA INTERACTION LOW-LEVEL WINDS KUROSHIO EXTENSION SATELLITE-OBSERVATIONS ATMOSPHERIC RESPONSE FLUX MEASUREMENTS SOUTHERN-OCEAN TEMPERATURE STRESS Tang, Zhijia Zhang, Rong-Hua Wang, Hongna Zhang, Shaoqing Wang, Hong Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions |
topic_facet |
mesoscale coupling atmospheric response mechanisms high-resolution climate model the Kuroshio Extensions (KE) the Agulhas Return Current (ARC) Meteorology & Atmospheric Sciences NUMERICAL WEATHER PREDICTION AIR-SEA INTERACTION LOW-LEVEL WINDS KUROSHIO EXTENSION SATELLITE-OBSERVATIONS ATMOSPHERIC RESPONSE FLUX MEASUREMENTS SOUTHERN-OCEAN TEMPERATURE STRESS |
description |
A strong positive correlation exists between mesoscale sea surface temperature (SST) and surface wind stress perturbations in the extratropical oceans, which is revealed by high-resolution satellite but is difficult to be accurately simulated in low-resolution coupled ocean-atmosphere models. The extent to which the mesoscale coupling is captured in a high-resolution Community Earth System Model (CESM-HR) is assessed in this study, with a focus on two regions, the Kuroshio Extensions (KE) and Agulhas Return Current (ARC), respectively. Compared with satellite observations, it is found that the CESM-HR can well depict the characteristics of the mesoscale air-sea coupling, with its strength being comparable to that observed; but in the KE region, the simulated strength is only half of the observed during summer. Mechanisms for the atmospheric responses to mesoscale SST perturbations through the pressure adjustment (PA) and the downward momentum transport (DMT) are analyzed. The results highlight different mechanisms for controlling the atmospheric responses over the KE and ARC regions, which are regionally and seasonally dependent. In the ARC region, pronounced dipole patterns of sea surface pressure (SLP) and vertical velocity perturbation responses indicate that the DMT exerts a dominant effect in both winter and summer. In the KE region, monopole patterns show the main role played by the PA mechanism for the atmospheric adjustment in summer, while dipole patterns indicate the main role played by the DMT mechanism in winter. The weak coupling strength in summer over the KE is closely related to the inadequate parameterization of vertical heat mixing. |
format |
Report |
author |
Tang, Zhijia Zhang, Rong-Hua Wang, Hongna Zhang, Shaoqing Wang, Hong |
author_facet |
Tang, Zhijia Zhang, Rong-Hua Wang, Hongna Zhang, Shaoqing Wang, Hong |
author_sort |
Tang, Zhijia |
title |
Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions |
title_short |
Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions |
title_full |
Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions |
title_fullStr |
Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions |
title_full_unstemmed |
Mesoscale Surface Wind-SST Coupling in a High-Resolution CESM Over the KE and ARC Regions |
title_sort |
mesoscale surface wind-sst coupling in a high-resolution cesm over the ke and arc regions |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2021 |
url |
http://ir.qdio.ac.cn/handle/337002/177652 https://doi.org/10.1029/2021MS002822 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS http://ir.qdio.ac.cn/handle/337002/177652 doi:10.1029/2021MS002822 |
op_doi |
https://doi.org/10.1029/2021MS002822 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
13 |
container_issue |
12 |
_version_ |
1766207586551463936 |