On the Sensitivity of the Relationship Between Hadley Circulation Asymmetry and ENSO in CMIP5 Models

Guo, Yongquan; Tan, Zhimin

doi:10.1029/2018gl079515

Cited by 14 publications

(5 citation statements)

References 36 publications

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“…However, some studies reported several ozone depletion events in the Arctic stratosphere, which are comparable to that of the Antarctic ozone hole (e.g., Manney et al, 2011). Arctic stratospheric ozone (ASO) was suggested to influence the El Niño-Southern Oscillation (ENSO) events (Garfinkel, 2017;Xie et al, 2016Xie et al, , 2017, whereas ENSO could exert significant influences on the HC (e.g., Guo & Tan, 2018a, 2018b, 2018cWang, 2002). Thus, changes in the ASO might also have impacts on the HC in the Northern Hemisphere (NH).…”

Section: Introductionmentioning

confidence: 99%

Signatures of the Arctic Stratospheric Ozone in Northern Hadley Circulation Extent and Subtropical Precipitation

Guan

Tian

2019

Geophysical Research Letters

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Previous studies showed that Antarctic ozone could modulate the Hadley circulation (HC) and precipitation in the Southern Hemisphere. However, whether and how, if any, Arctic stratospheric ozone (ASO) modulates the northern HC and subtropical precipitation remains unclear. We found an out‐of‐phase relationship between the northern HC extent (HCE) and ASO during boreal spring on interannual timescales during 1979–2014. Decreased (increased) ASO tends to result in an equatorward (poleward) shift of HCE by +0.67° (−0.45°) latitude per one standard deviation of decreased (increased) ASO year. Observational analysis and model simulations show that increased ASO leads to an equatorward shift of HCE and subtropical moistening via weakened eddy momentum flux and decreased subtropical static stability, accompanied with negative eddy momentum flux divergence anomalies and northward meridional wind anomalies over the subtropics. Our results may help to understand the linkage between the Arctic and midlatitudes, especially important for the subtropical precipitation and hydrological cycle.

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Section: Introductionmentioning

confidence: 99%

Signatures of the Arctic Stratospheric Ozone in Northern Hadley Circulation Extent and Subtropical Precipitation

Guan

Tian

2019

Geophysical Research Letters

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“…Hence, there is a close relation between the ENSO and the HC (Huang et al, 2019). The intensification of the HC in the Northern Hemisphere (NH) and the changes in its dominant mode exhibit a significant relationship with the ENSO events since 1970 (Caballero, 2007;Guo and Tan, 2018a;Guo and Tan, 2018b;Wang et al, 2020). Such as, Oort and Yienger (1996) found that the intensity of the HC in the eastern Pacific is closely linked to the SST, where the intensity of the HC increases when ENSO is in its positive phase.…”

Section: Introductionmentioning

confidence: 98%

Relationships between the Hadley circulation and tropical sea surface temperature with different meridional structures simulated in CMIP6 models

Feng

et al. 2023

Front. Mar. Sci.

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The variability of the Hadley Circulation (HC) is greatly impacted by the meridional structure of sea surface temperature (SST), which has varied effects depending on its symmetrical or asymmetrical pattern relative to the equator. By using the Coupled Comparison Program International Project Phase 6 (CMIP6) model outputs and reanalysis datasets, this study assesses the capacity of CMIP6 models to simulate the relationship between the HC and tropical SST under different meridional structures, as well as investigates the possible causes for simulation biases. It is shown that the CMIP6 models can successfully reproduce climatological HC, tropical SST, and their spatial patterns of first leading modes under different meridional structures, where the correlation coefficient between simulations and observations reaches 0.8 or above. By comparison, the CMIP6 model outputs exhibit substantial differences in simulating the HC to SST response over the different meridional structures, with obvious inter-model differences. Considering the capability in simulating the HC to tropical SST response, the CMIP6 models are divided into two types, Type I model and Type II model. Models of Type I are those whose simulation results are basically close to the reanalysis data, with the biases being less than 20%. The models of Type II are those whose simulated response ratios are much stronger than those of the reanalysis. It is found that the models of Type II overestimate the intensity of El Niño-Southern Oscillation (ENSO) events, and remarkably underestimate the HC and SST correlation in the equatorial symmetric part, resulting in the inability of the models of Type II to capture the connection of the HC and tropical SST. The results indicate that, the component of the CMIP6 models in reproducing the ENSO events has a considerable impact on the simulation of the HC and tropical SST relationship, which offers recommendations for enhancing the capability of models to simulate large-scale tropical air-sea interactions.

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“…Previous studies have interpreted that the equatorial quasi‐symmetric mode of the HC is connected to El Niño (e.g., Feng & Li, 2013; Ma & Li, 2008; Oort & Yienger, 1996). Meanwhile, it has been illustrated that the occurrence of El Niño events could contribute to the asymmetric mode of the HC (e.g., Feng et al., 2019; Guo & Tan, 2018a; Zhang & Wang, 2013). The equatorial asymmetric and quasi‐symmetric modes are linearly independent; however, both are related to the ENSO.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Impacts of El Niño Development and Decay Stages on the Hadley Circulation

Feng,

Ji,

et al. 2023

Geophysical Research Letters

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The El Niño-Southern Oscillation (ENSO) is the most prominent interannual climate variability mode and is characterized by fluctuations in the sea surface temperature (SST) and atmospheric pressure in the Pacific Ocean (Bjerknes, 1969;Timmermann et al., 2018). Researches have highlighted that there are substantial differences in SST meridional structure across different regions during the El Niño event (Feng et al., 2019;McGregor et al., 2012;Yu et al., 2022). During the development and decay stages of El Niño, SST anomalies occur globally. El Niño is accompanied by positive SST anomalies in the equatorial central-eastern Pacific Ocean, which can shift tropical convections and excite the Indian Ocean dipole mode, as well as SST fluctuations in the tropical Atlantic (Ham et al., 2021;McCreary et al., 2005). As El Niño decays, it triggers atmospheric teleconnections that lead to significantly positive SST anomalies in the northern tropical Atlantic and Indian Oceans (Jiang & Li, 2019;Schott et al., 2009). Additionally, during the decay of El Niño, the westerly winds on the sides of the equatorial tropical Pacific weaken and decay unevenly, causing SST to display different anomalous signs on the flanks of the equator over the tropical Pacific (Song et al., 2022;Stuecker et al., 2015). Consequently, large differences in the associated SST anomalies are observed during different phases of ENSO.The Hadley Circulation (HC) is a significant component of the mean meridional circulation (Hadley, 1735) that strongly regulates climate systems. The interannual variability of the HC is classified into two dominant modes:

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On the Sensitivity of the Relationship Between Hadley Circulation Asymmetry and ENSO in CMIP5 Models

Cited by 14 publications

References 36 publications

Signatures of the Arctic Stratospheric Ozone in Northern Hadley Circulation Extent and Subtropical Precipitation

Signatures of the Arctic Stratospheric Ozone in Northern Hadley Circulation Extent and Subtropical Precipitation

Relationships between the Hadley circulation and tropical sea surface temperature with different meridional structures simulated in CMIP6 models

Asymmetric Impacts of El Niño Development and Decay Stages on the Hadley Circulation

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