Influence of the North Pacific Victoria mode on western North Pacific tropical cyclone genesis

Pu, Xiu-Shu; Chen, Quanliang; Zhong, Quanjia; Ding, Ruiqiang; Liu, Ting

doi:10.1007/s00382-018-4129-z

Cited by 27 publications

(18 citation statements)

References 55 publications

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“…Note that the regressed SST field with respect to the reduced SIC (Figure 6) also shows a similar pattern to the second empirical orthogonal function mode (EOF2) of SST anomalies in the North Pacific, namely the Victoria mode (VM), which was highly correlated with TC frequency over the WNP (Pu et al, 2019). However, we found no statistically significant correlation between the summer Victoria mode index and spring SIC index.…”

Section: Conclusion and Discussionsupporting

confidence: 56%

How Does the Arctic Sea Ice Affect the Interannual Variability of Tropical Cyclone Activity Over the Western North Pacific?

Zhan

et al. 2021

Front. Earth Sci.

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Although many studies have revealed that Arctic sea ice may impose a great impact on the global climate system, including the tropical cyclone (TC) genesis frequency over the western North Pacific (WNP), it is unknown whether the Arctic sea ice could have any significant effects on other aspects of TCs; and if so, what are the involved physical mechanisms. This study investigates the impact of spring (April-May) sea ice concentration (SIC) in the Bering Sea on interannual variability of TC activity in terms of the accumulated cyclone energy (ACE) over the WNP in the TC season (June-September) during 1981–2018. A statistical analysis indicates that the spring SIC in the Bering Sea is negatively correlated with the TC season ACE over the WNP. Further analyses demonstrate that the reduction of the spring SIC can lead to the westward shift and intensification of the Aleutian low, which strengthens the southward cold-air intrusion, increases low clouds, and reduces surface shortwave radiation flux, leading to cold sea surface temperature (SST) anomaly in the Japan Sea and its adjacent regions. This local cloud-radiation-SST feedback induces the persistent increasing cooling in SST (and also the atmosphere above) in the Japan Sea through the TC season. This leads to a strengthening and southward shift of the subtropical westerly jet (SWJ) over the East Asia, followed by an anomalous upper-level anticyclone, low-level cyclonic circulation anomalies, increased convective available potential energy, and reduced vertical wind shear over the tropical WNP. These all are favorable for the increased ACE over the WNP. The opposite is true for the excessive spring SIC. The finding not only has an important implication for seasonal TC forecasts but also suggests a strengthened future TC activity potentially resulting from the rapid decline of Arctic sea ice.

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Section: Conclusion and Discussionsupporting

confidence: 56%

How Does the Arctic Sea Ice Affect the Interannual Variability of Tropical Cyclone Activity Over the Western North Pacific?

Zhan

et al. 2021

Front. Earth Sci.

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“…Other factors may also play a role in influencing the connection between VM on MJO activity. For example, Pu and Chen (2019) argue that the FMA VM exhibits a strong connection with tropical cyclone frequency in the following summer over the western North Pacific. It is necessary to investigate the influence of tropical cyclones on MJO development during VM events.…”

Section: Summary and Discussionmentioning

confidence: 99%

Influence of the North Pacific Victoria Mode on the Madden–Julian Oscillation

Wen¹,

Chen²,

Li³

et al. 2020

Front. Earth Sci.

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Using the observational data and the Coupled Model Intercomparison Project phase 5 (CMIP5) models this study examined the influence of the North Pacific Victoria mode (VM) on the Madden–Julian Oscillation (MJO). The results show that the February–April VM had a significant influence on the development and propagation of the MJO over the equatorial central-western Pacific (ECWP) during spring (March-May) between 1979 and 2017. Specifically, MJO development was favored more by positive VM events than negative VM events. These complicated connections could have been caused by the SST gradient anomalies associated with positive VM events, enhancing the convergence of low-level over the ECWP. When this is combined with warm SST anomalies in the equatorial central Pacific it could have led to a boost in the Kelvin wave anomalies, resulting in enhanced MJO activity over the ECWP. These conclusions indicate that the VM is an important factor in MJO diversity.

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“…Liu et al (2017) examined the influence of SH atmospheric variability on the South China Sea summer monsoon via changing cross-equatorial easterly flows. Pu et al (2018) demonstrated that the boreal spring Victoria mode (extratropical EOF2 SSTA pattern in North Pacific; Vimont et al 2003aVimont et al , 2003b has an impact on the boreal summer tropical cyclone over the northwestern Pacific. These studies suggest that the extratropical atmospheric and SST variability in either the South or the North Pacific does provide useful information for the tropics.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Influence of South Pacific quadrapole on austral winter precipitation over the SPCZ

Qin

Zhou

Ding

et al. 2018

Environ. Res. Lett.

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The South Pacific convergence zone (SPCZ) is a key component in the weather and climate system. By analogy to the intertropical convergence zone, the SPCZ is also part of the 'engine' for the tropical convection. There have been many studies about the tropical impacts on the SPCZ. Here, we show that the SPCZ, especially the precipitation in this region, is subject to the influence of South Pacific quadrapole (SPQ) in the subtropics via the mechanism of wind-evaporation-sea surface temperature feedback (SST). The anomalous winds (at 850 hPa) induced by the SST anomaly gradient produce low-level convergence and activate upward motion over the SPCZ region, ultimately leading to deep convection and enhanced precipitation there. As a result, the variability in the SPQ leads the changes in the SPCZ by about 5 months. Such extratropical impacts on the SPCZ are independent of the El Niño/Southern Oscillation, which has been demonstrated to have significant impacts on the SPCZ in existing studies. The process study unveils a new connection between the subtropics in the Southern Hemisphere and the tropics, which can potentially enhance predictive understanding of the SPCZ with obvious implications for the weather and climate system.

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Influence of the North Pacific Victoria mode on western North Pacific tropical cyclone genesis

Cited by 27 publications

References 55 publications

How Does the Arctic Sea Ice Affect the Interannual Variability of Tropical Cyclone Activity Over the Western North Pacific?

How Does the Arctic Sea Ice Affect the Interannual Variability of Tropical Cyclone Activity Over the Western North Pacific?

Influence of the North Pacific Victoria Mode on the Madden–Julian Oscillation

Influence of South Pacific quadrapole on austral winter precipitation over the SPCZ

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