Key Role of Arctic Sea‐Ice in Subseasonal Reversal of Early and Late Winter PM<sub>2.5</sub> Concentration Anomalies Over the North China Plain

An, Xiadong; Chen, Wen; Ma, Tianjiao; Aru, Hasi; Cai, Qingyu; Li, Chun

doi:10.1029/2022gl101841

Cited by 8 publications

(2 citation statements)

References 54 publications

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“…Numerous studies have extensively explored the simultaneous relationship between variations in winter Eurasian climate and sea ice in polar region (An et al., 2023; Chen et al., 2021; Duan et al., 2022; Honda et al., 2009). However, there remains a noticeable lack of attention given to understanding the influence of preceding sea ice in polar region on the climate change in the TP during the subsequent summer.…”

Section: Introductionmentioning

confidence: 99%

Variations in Summer Surface Air Temperature Over the Eastern Tibetan Plateau: Connection With Barents‐Kara Spring Sea Ice and Summer Arctic Oscillation

Deng,

Zhou,

Wang

et al. 2023

JGR Atmospheres

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Variations in surface air temperature on the eastern Tibetan Plateau (TP‐SAT) during boreal summer, related to Barents‐Kara spring sea ice and summer Arctic Oscillation (AO), are investigated using observations and ERA‐5 reanalysis data during 1979–2018. Results show that the primary mode of summer eastern TP‐SAT (SAT_EOF1) is characterized by the consistent warming pattern with larger values over the northeastern TP, which is linked with the anticyclonic circulation located in the northeastern flank of the TP. This anticyclone enhances westward water vapor transport, warm temperature advection, and causes descending over the eastern TP, Descending further results in deceased middle level cloud cover and increased solar radiation, accordingly, favoring the eastern TP warming. Further statistical analysis reveals a robust connection between Barents‐Kara spring sea ice, summer AO and SAT_EOF1. Moreover, anticyclonic anomaly located in the northeastern region of the TP acts as an important driver of this consistent warming pattern over the eastern TP, which is modulated by two individual Rossby wave trains from the northwestern Russia and northwestern Atlantic. The spring sea ice in Barents‐Kara could cause decreased precipitation and reduced soil moisture in northwestern Russia during following summer, which further induces the Eurasian‐like teleconnection and affects the anticyclonic anomaly situated in the northeastern flank of the TP, thereby favoring eastern TP warming. In addition, from northwestern Atlantic to northeastern region of the TP, the Rossby wave train is mainly affected by summer AO, with positive AO causing anticyclonic anomaly over northeast of the TP, thus contributing to the TP warming.

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Section: Introductionmentioning

confidence: 99%

Variations in Summer Surface Air Temperature Over the Eastern Tibetan Plateau: Connection With Barents‐Kara Spring Sea Ice and Summer Arctic Oscillation

Deng,

Zhou,

Wang

et al. 2023

JGR Atmospheres

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“…Winter precipitation over the WTP is characterized by subseasonal reversals, with opposite trends in early and late winter precipitation. The subseasonal reversal of meteorological variables in winter could be related to the internal atmospheric variability, SST variations, and Arctic sea ice decline (An et al., 2023; H. Li et al., 2021; Shen et al., 2019; X. Xu et al., 2022; Zhang & Wu, 2023). However, the underlying mechanism behind the subseasonal reversal of winter precipitation over the WTP remains unclear.…”

Section: Introductionmentioning

confidence: 99%

What Controls the Subseasonal Precipitation Reversal Over the Western Tibetan Plateau in Winter?

Liu,

Li,

Zhang

et al. 2023

JGR Atmospheres

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This study reveals a significant subseasonal reversal of precipitation on the western Tibetan Plateau (WTP) from a deficit in December to an increase in January and February (JF). Changes in vertical moisture advection induced by the dynamic effects contribute mostly to the subseasonal precipitation reversal. This process involves the reversal of the subseasonal westerly driven uplift, accompanied by the weakened (enhanced) subtropical westerly jet and anticyclonic (cyclonic) anomalies over the WTP in December (JF). Further analysis shows that the North Atlantic Tripolar‐like (NAT) sea surface temperature (SST) modes could regulate the sunseasonal winter precipitation reversal over the WTP. The spatially inconsistent changes in SST can result in subseasonal reversed turbulent heat flux anomalies over Iceland‐Scandinavia in December and JF. In particular, the suppressed turbulent heat flux over the extratropical Northeast Atlantic in December leads to significant descending motion and upper tropospheric convergence. The advection of absolute vorticity induced by convergent winds associated with the NAT favors the generation of Rossby wave sources over Iceland‐Scandinavia, which then enhances the wave activity fluxes propagation. However, there are no significant changes in wave sources over Iceland‐Scandinavia in JF. The discrepancies in wave propagation intensity over Iceland‐Scandinavia determine the changes in the atmospheric pattern over the WTP, with anomalous anticyclone in December and cyclone in JF, and ultimately lead to the precipitation reversal. Furthermore, our results show that the suppressed transient eddies over the Atlantic storm track in JF may also contribute to the weakened wave propagation over Iceland‐Scandinavia.

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Influence of the mid-high-latitude Eurasian ISO on PM2.5 concentration anomaly in North China during boreal winter

Yang,

Liu,

Zhu

et al. 2023

Clim Dyn

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Key Role of Arctic Sea‐Ice in Subseasonal Reversal of Early and Late Winter PM_2.5 Concentration Anomalies Over the North China Plain

Cited by 8 publications

References 54 publications

Variations in Summer Surface Air Temperature Over the Eastern Tibetan Plateau: Connection With Barents‐Kara Spring Sea Ice and Summer Arctic Oscillation

Variations in Summer Surface Air Temperature Over the Eastern Tibetan Plateau: Connection With Barents‐Kara Spring Sea Ice and Summer Arctic Oscillation

What Controls the Subseasonal Precipitation Reversal Over the Western Tibetan Plateau in Winter?

Influence of the mid-high-latitude Eurasian ISO on PM2.5 concentration anomaly in North China during boreal winter

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Key Role of Arctic Sea‐Ice in Subseasonal Reversal of Early and Late Winter PM2.5 Concentration Anomalies Over the North China Plain

Cited by 8 publications

References 54 publications

Variations in Summer Surface Air Temperature Over the Eastern Tibetan Plateau: Connection With Barents‐Kara Spring Sea Ice and Summer Arctic Oscillation

Variations in Summer Surface Air Temperature Over the Eastern Tibetan Plateau: Connection With Barents‐Kara Spring Sea Ice and Summer Arctic Oscillation

What Controls the Subseasonal Precipitation Reversal Over the Western Tibetan Plateau in Winter?

Influence of the mid-high-latitude Eurasian ISO on PM2.5 concentration anomaly in North China during boreal winter

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Key Role of Arctic Sea‐Ice in Subseasonal Reversal of Early and Late Winter PM_2.5 Concentration Anomalies Over the North China Plain