Abstract The Victoria Mode (VM) plays a vital role in shaping Pacific Sea Surface Temperature (SST) variability. However, its impact on late‐season tropical cyclone genesis (TCG) over the western North (WNP) remains underexplored. This study investigated influence of VM WNP TCG from 1965 to 2020. Significant relationships emerge interannual (6 year) and decadal (11 timescales. On timescale, correlates positively with west 145°E negatively east. negative relationship spans entire WNP....

The heaviest rainfall in recent six decades fell Beijing on 21 July 2012, reaching a record of 460 mm within 18 h. This was typical remote precipitation event related to Typhoon Vicente (1208). Observational analysis indicates that influenced distant heavy by transporting water vapor northward the area. moisture transport mainly driven interaction between and western Pacific subtropical high (WPSH) associated with formation low-level southeasterly channel. A set numerical sensitivity...

The geographical and temporal characteristics of upper-tropospheric cold low (UTCL) their relationship to tropical cyclone (TC) track intensity change over the western North Pacific (WNP) during 2000–12 are examined using TC best global meteorological reanalysis data. An analysis two datasets shows that 73% 346 TCs coexist with 345 UTCLs, 21% latter within an initial cutoff distance 15°. By selecting those coexisted systems this distance, possible influences UTCL on found, depending relative...

Abstract A statistical analysis of tropical upper-tropospheric trough (TUTT) cells over the western North Pacific Ocean (WNP) during 2006 to 2015 is performed using NCEP Final reanalysis. total 369 TUTT-cell events or 6836 TUTT are identified, with a peak frequency in July. Most form east 150°E and then move southwestward mean speed 6.6 m s −1 life span 4.4 days. About 75% have radii <500 km 200-hPa central heights <1239.4 dam. In general, exhibit negative height anomalies above 450...

Abstract This study investigates the influence of Northeast China cold vortex (NCCV) on northward‐moving typhoons (NTCs) over western North Pacific (WNP). There is a significant inverse relationship between NCCV during June–September and simultaneous NTCs 1981–2021. Fewer (more) are observed active (inactive) year combination less NTC genesis, particularly central region 10°–30° N 130°–150° E, fewer moving northwestward making landfall in coastal regions Yellow Sea Bohai Sea. These...

Abstract Tropical cyclones (TCs) over the Bay of Bengal (BOB) can interact with South Branch Trough (SBT) as they move northward and potentially amplify Rossby waves. This study evaluates features waves their downstream impact on rainfall in China. Results indicate that TC‐SBT interactions primarily occur May October‐November (Oct‐Nov), probabilities 59% 53% respectively. Notably, wave train associated BOB TCs is more pronounced during Oct‐Nov due to stronger subtropical westerly jet,...

Abstract The tendency in tropical cyclone (TC) rainfall is of great concern due to its remarkable contribution global precipitation and extreme events. This study finds a decreasing trend TC inner‐core rain rate over the western North Pacific (WNP) from 1998 2019. basinwide mainly induced by rates region west 150°E, while it seldom linked changes distribution occurrence. maximum decreases are observed offshore areas along coastlines East Asia. Further analysis reveals that change atmospheric...

Abstract This study investigates the interannual variability of rapid intensification (RI) magnitude western North Pacific (WNP) tropical cyclones. There is a significant correlation between basin‐averaged RI during July–November and simultaneous Western (WP) teleconnection index from 1982 to 2021. is, on average, larger (smaller) in positive (negative) WP phases. During WP, changes exhibit southwest‐northeast dipolar pattern, with increases over southwestern quadrant WNP weak decreases...

Abstract This study investigates the impact of central Pacific (CP) El Niño–Southern Oscillation (ENSO) on tropical cyclone (TC) frequency over western North (WNP) decadal and interannual timescales. The CP ENSO‐TC relationship is strong significant only timescales, with enhanced TC formation most WNP associated warm ENSO phases. changes, driven by ENSO, exhibit a southeast–northwest dipole pattern similar to typical induced eastern ENSO. Associated phases timescales are increases in east...

We examined the processes of tropical cyclogenesis in strong monsoon trough pattern over western North Pacific (WNP) using reanalysis data and numerical experiments. Composite analysis showed that more cyclones are likely to form central WNP (130–165°E) fewer appear (120–130°E) eastern (165–180°E) when extends southeastward. Numerical experiments with same weak artificial vortices inserted into eight different regions disturbances tend develop rapidly near 140–160°E, particularly 150–155°E...

Abstract This first multi‐year investigation focuses on bores over the southern North China Plain during 2015–2019 warm seasons. Bore structure depended location with undular tending to occur close coast and non‐undular west near elevated terrain. Bores were most likely June July when convection is active. While bore frequency Southern Great Plains (SGP) of U.S. linked region's nocturnal low‐level jet, herein sensitive synoptic regime ∼80% occurring 4‐to‐5‐day periods under three different...

Abstract September–November (e.g., autumn) 2023 produced the fewest western North Pacific (WNP) tropical cyclones (TCs) since 1951, likely as a joint response to El Niño and warm phase of Mode (NPM). Decreases in both TC genesis frequency two potential indices (GPIs) over WNP were result Niño-induced NPM-induced negative low-level relative vorticity anomalies. Over eastern WNP, GPI reductions also associated with decreases where TC-suppressing effect NPM surpassed TC-favoring Niño. The...

Abstract The impact of the Northeast China Cold Vortex (NCCV) on tropical cyclone (TC) intensity change was studied based statistics, revealing a significant decrease in rate TC weakening and lower probability rapid (RW) environments NCCVs. This is mainly attributable to external dynamic forcing induced by NCCV as eddy angular momentum import at upper levels increases significantly, which offsets unfavorable sea surface temperature increase vertical wind shear. upper-level positive potential...

Abstract Vertical wind shear (VWS), as an important dynamic factor influencing tropical cyclone rainfall (TCR), has a remarkable diurnal cycle of variation over the East Asia–western North Pacific region. The magnitude (TC)‐experienced VWS enhanced amplitude but different phases South China Sea (SCS) and coastal (CEC) compared with that open ocean. Diurnal in TCR SCS shows statistically significant correlation VWS. convection concentrated downshear‐left quadrant strengthens markedly when...

Abstract Tropical cyclones (TCs) originating in the Bay of Bengal (BOB) can induce heavy rainfall remote South China, primarily due to abundant tropical moisture transporting from vicinity BOB TCs. This study analyzes 28 TC precipitation (TRP) events occurring over China during pre‐summer rainy season (April June) 1979 2021, a synoptic climatology perspective. On average, TRP persisted for about 3 days, with primary centers identified northeastern Guangxi Province, central and coastal areas...

In this study, a sensitivity experiment based on numerical model is conducted to study the influence of diurnal variation radiation rapid intensification process Super Typhoon Rammasun (1409) in South China Sea. The result shows that changing can change onset time typhoon and its maximum intensity. Vertical wind shear key factor TC influenced by cycle, causes obvious vertical thermal difference between sea land. oscillation promotes rainband, with an opposite trend control experiments,...