Impacts of the Arctic stratospheric polar vortex changes on the frontogenesis over the northern middle latitudes during winter

Zhang, Jiankai; Zhang, Chongyang; Zhao, Siyi; Liu, Yixi; Du, Shihang; Wang, Wuke; Huang, Jinlong; Xu, Mian

doi:10.1016/j.atmosres.2023.106751

Cited by 7 publications

(1 citation statement)

References 91 publications

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“…The variability of the stratospheric polar vortex (SPV) can exert influences on the tropospheric weather and climate on the weekly to monthly timescales (Domeisen & Butler, 2020; Domeisen et al., 2020; Dunn‐Sigouin & Shaw, 2015; Garfinkel et al., 2017; Huang & Tian, 2019; Kidston et al., 2015; Kolstad et al., 2010; Scaife et al., 2016; Sigmond et al., 2013; Thompson & Wallace, 2001; Waugh et al., 2017; Xie et al., 2016, 2020; J. Zhang et al., 2023). Past studies have paid extensive attention to the zonally symmetric pattern of weak SPV states (Sudden stratospheric warmings; SSWs), which feature abrupt decelerations or even reversals of westerlies and increase of geopotential heights in the entire polar stratosphere (Baldwin et al., 2021; Butler et al., 2015, 2017; Charlton & Polvani, 2007; King et al., 2019; Lehtonen & Karpechko, 2016; Lu et al., 2021; Rao et al., 2018, 2019, 2020, 2021; White et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events

Zou,

Zhang

2024

Geophysical Research Letters

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The cold Eurasia has been proposed to be closely linked to the weakening of the stratospheric polar vortex (SPV), however, how the Arctic sea ice modulates the surface impacts of the weak SPV is unclear. This study explores the critical modulating role of reduced Arctic sea ice in the surface cooling response to SPV stretching events in autumn. Here, through ERA5 reanalysis and Whole Atmosphere Community Climate Model simulations, we show that Eurasian cold events are more likely (45%) to occur in days 30–50 after the onset of SPV stretching events under lower Barents‐Kara Seas (BKS) sea ice conditions, in contrast to under heavy BKS sea ice conditions when robust surface cooling is absent. The stratospheric and tropospheric pathways explain 46.8% and 53.2% of the total variance of Siberian coldness, respectively. The downward extension of anomalous stratospheric wave‐2 ridge to the troposphere intensifies the Arctic‐North European high, favoring the subsequent colder Siberia.

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Section: Introductionmentioning

confidence: 99%

Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events

Zou,

Zhang

2024

Geophysical Research Letters

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Continental cold-air-outbreaks under the varying stratosphere-troposphere coupling regimes during stratospheric Northern Annular Mode events

Yu,

Ren,

et al. 2024

Clim Dyn

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A Stratospheric Northern Annular Mode (SNAM) phase-based composite analysis reveals that continental Cold Air Outbreaks (CAOs) can occur during both positive and negative SNAM events. CAOs tend to occur over Asia, characterized by a meridional-dipole surface temperature anomaly pattern (cold midlatitudes and warm high-latitudes) when the SNAM index is decreasing or the stratospheric polar vortex is weakening, but over North America and Europe with a meridionally-homogeneous pattern when the SNAM index is increasing or the stratospheric polar vortex is strengthening. While the decreasing SNAM is dominated by a stronger stratospheric poleward warm branch (WB-ST) of the isentropic meridional mass circulation and vice versa, the CAOs always follow a stronger tropospheric poleward warm branch (WB-TR) and an equatorward cold branch (CB) of the isentropic meridional mass circulation. The correspondence between the stronger/weaker WB-ST and stronger/weaker WB-TR&CB during majority of SNAM phases (referred to as stratosphere-troposphere coupling regimes) is responsible for the CAOs in Asia. During the remaining phases (stratosphere-troposphere decoupling regimes), in accompany with a weaker/stronger WB-ST, the WB-TR&CB are stronger/weaker and relates to the CAOs occurred in North America and Europe. The coupling regimes when the stratospheric polar vortex is weakening/strengthening are mainly attributed to the E-P flux convergence/divergence from the middle troposphere to the lower stratosphere, the larger wave amplitude throughout the column, and anomalous tropospheric wave flux mainly in the Asia in subpolar latitudes. The decoupling regimes, however, are mainly related to the anomalous westward-tilting of waves and the wave flux reflection toward the North America or Europe.

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The effects of gravity waves on ozone over the Tibetan Plateau

Chang,

He,

Huang

2024

Atmospheric Research

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Impacts of the Arctic stratospheric polar vortex changes on the frontogenesis over the northern middle latitudes during winter

Cited by 7 publications

References 91 publications

Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events

Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events

Continental cold-air-outbreaks under the varying stratosphere-troposphere coupling regimes during stratospheric Northern Annular Mode events

The effects of gravity waves on ozone over the Tibetan Plateau

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