Season-dependent variability and influential environmental factors of super-typhoons in the Northwest Pacific basin during 2013–2017

Pandey, Ravi Shankar; Liou, Yuei An; Liu, Ji Chyun

doi:10.1016/j.wace.2021.100307

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…Although, both SST datasets used in this article provide monthly averaged SST data for the whole twelve months of a year, but to make the data useful for typhoon-related research [9] , [10] , [11] , only the typhoon season months of May to November based data are extracted. For clarification, typhoons come in the NWP throughout the year and thus there is no exact typhoon season definition in the NWP.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Sea surface temperature (SST) and SST anomaly (SSTA) datasets over the last four decades (1977–2016) during typhoon season (May to November) in the entire Global Ocean, North Pacific Ocean, Philippine Sea, South China sea, and Eastern China Sea

Pandey

Liou²

2022

Data in Brief

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Sea surface temperature (SST) and SST anomaly (SSTA) datasets over the last four decades (1977–2016) during typhoon season (May to November) in the entire Global Ocean, North Pacific Ocean, Philippine Sea, South China sea, and Eastern China Sea

Pandey

Liou²

2022

Data in Brief

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“…Every year from July to September (JAS) is the active period of typhoons over the WNP, and it is one of the seasons that typhoons have the greatest impact on the WNP region. Studies have also shown an increasing trend in the number of typhoons and super typhoons in JAS over the WNP in the recent decades (Pandey et al 2021(Pandey et al , 2022. In addition, July is the beginning of the peak season for typhoons, and has approximately four TCs over the WNP every year.…”

Section: Introductionmentioning

confidence: 98%

Role of the intraseasonal IPCO in the absence of typhoons in July 2020

Wang

et al. 2022

Clim Dyn

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The influence of the intraseasonal Indo-western Pacific convection oscillation (IPCO) on the absence of typhoons in July 2020 over the western North Pacific (WNP) was explored. While observation analysis shows that necessary conditions such as sea surface temperature (SST) and vertical wind shear in July 2020 meet the basic requirement of or even are conducive to the formation of typhoon, the unprecedented absence of typhoon over the WNP occurred in July 2020, and it is the first time that no typhoon in July since 1951. Additionally, significant differences were found in the number of typhoons in July between the different phases of the intraseasonal IPCO, and the number in the positive phase of the intraseasonal IPCO was significantly higher than that in the negative phase of the intraseasonal IPCO. In July 2020, the intraseasonal IPCO was in a strong negative phase, with the third lowest index in history and had the strongest inhibition effect on convection over the WNP on record, leading to large-scale circulation anomalies. The strongest descending movement on record inhibited the upward transport of water vapor and the development of cumulus convection, thereby reducing the release of latent heat of condensation and making it difficult to form a typhoon warm-core structure. In addition, the geopotential height increased over the WNP, and the western Pacific subtropical high moved southerly, which inhibited typhoon formation. Simultaneously, the South China Sea monsoon trough weakened significantly, with increased negative vorticity anomaly in the response scale, which hindered disturbance generation. The lowest genesis potential index confirmed that the large-scale circulation anomaly caused by the intraseasonal IPCO had an unprecedented restraining effect on typhoon generation, leading to the absence of typhoons over the WNP in July 2020.

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“…Due to the consequential strong wind, heavy rainfall, and high storm surge, typhoons are believed as one of the most destructive natural hazards (He, He, Li, et al., 2020; He, He, Chen, et al., 2020; Lee et al., 2020; Ng & Leckebusch, 2021; Pugatch, 2019; Sajjad, Lin, & Chan, 2020; Weinkle et al., 2018). Concurrent precipitation and wind speed extremes may induce other hazards/risks through a “disaster chain” effect thereby endangering the surrounding society, economy, and health of human and animal residents (Haghroosta & Ismail, 2017; Pandey et al., 2021; Zhang et al., 2021). For instance, typhoons not only cause a direct economic loss of about 5.6 billion USD annually in China but also lead to a profound psychological trauma on the affected populations (Elliott et al., 2015; Labarda & Chan, 2018).…”

Section: Introductionmentioning

confidence: 99%

Downward Momentum Flux: An Important Mechanism of Typhoon Maintaining Ground Destructive Force

Lan

Xie

et al. 2023

JGR Atmospheres

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Under the background of global climate change, typhoons have been attracting increasing attention due to their extraordinary destructive potential and great impact on the coastal areas of the South China Sea. Although the risk of strong winds related to typhoons has long been of interest, less is known about the underlying mechanism responsible for the severe near‐surface winds. Using eddy covariance data collected at four different heights on a 365‐m meteorological tower located in a coastal region, the characteristics of the convective typhoon boundary layer and the associated turbulence structures are compared with their counterparts in the “textbook” dynamically unstable boundary layer. In the convective typhoon boundary layer, bulk wind shear predominates the generation of mechanical turbulence, enhancing the vertical correlation between vertical layers. The spectral analysis highlights the salient features of turbulent structures under the convective typhoon boundary layer, confirming that the gust disturbance with the nondimensional frequency ranging from 0.003 to 0.3 modulates not only turbulent transports but also the horizontal flow. Such gusts with reduced phase difference enhance the downward momentum transport, mainly responsible for the maintenance of the strong near‐surface winds during typhoon landfalls.

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Season-dependent variability and influential environmental factors of super-typhoons in the Northwest Pacific basin during 2013–2017

Cited by 9 publications

References 24 publications

Sea surface temperature (SST) and SST anomaly (SSTA) datasets over the last four decades (1977–2016) during typhoon season (May to November) in the entire Global Ocean, North Pacific Ocean, Philippine Sea, South China sea, and Eastern China Sea

Sea surface temperature (SST) and SST anomaly (SSTA) datasets over the last four decades (1977–2016) during typhoon season (May to November) in the entire Global Ocean, North Pacific Ocean, Philippine Sea, South China sea, and Eastern China Sea

Role of the intraseasonal IPCO in the absence of typhoons in July 2020

Downward Momentum Flux: An Important Mechanism of Typhoon Maintaining Ground Destructive Force

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