Distinct Interdecadal Change Contrasts Between Summer and Autumn in Latitude‐Longitude Covariability of Northwest Pacific Typhoon Genesis Locations

Wu, Zeming; Hu, Chundi; Wang, Junbin; Chen, Weizhen; Lian, Tao; Yang, Song; Chen, Dake

doi:10.1029/2021gl093494

Cited by 5 publications

(3 citation statements)

References 44 publications

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“…Since TC genesis in the WNP experiences notable seasonality on both the interannual and interdecadal time scales (Chang et al., 2021; Fan et al., 2019; Peng et al., 2021; Wang & Chan, 2002; Wang & Wang, 2019; Wu et al., 2021), one may curious about the relative contribution of interannual and interdecadal variabilities to the seasonality in the relationship between the PMM and WNP TC frequency. It is found that the seasonality in the relationship between the PMM and WNP TC genesis frequency exists on both the interannual (frequency lower than 8‐year) and interdecadal (frequency greater than 8‐year) timescales, both of which show insignificant correlation in May–July but significant correlation in January–April and August–December.…”

Section: Summary and Discussionmentioning

confidence: 99%

Season‐Dependent Modulation of Pacific Meridional Mode on Tropical Cyclone Genesis Over the Western North Pacific

Wang

et al. 2023

JGR Atmospheres

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As the most active basin of tropical cyclone (TC) activity, the western North Pacific (WNP) brings up more than 30% of global TC activity (Chan, 2005;Gray, 1968), which causes enormous disasters to coastal Asia (Zhang et al., 2009). Thus, understanding the climate variabilities in TC genesis over the WNP would greatly benefit the seasonal forecasting and disaster migration of TC activity (Camargo et al., 2007;Klotzbach et al., 2019;Wang et al., 2019a;Zhao et al., 2022), and thus be of prodigious societal and scientific concerns.Climate variabilities in TC genesis over the WNP are usually interpreted by variations in sea surface temperature (SST) across the tropical and subtropical oceans through modifying the local large-scale circulation over the WNP (Wang & Wang, 2019). Among them, the influences of El Niño-Southern Oscillation (ENSO) on the WNP TC

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Section: Summary and Discussionmentioning

confidence: 99%

Season‐Dependent Modulation of Pacific Meridional Mode on Tropical Cyclone Genesis Over the Western North Pacific

Wang

et al. 2023

JGR Atmospheres

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“…On the contrary, increased WNP TC genesis frequency could be observed in May after the late 1990s [12,13]. Other studies [15][16][17][18][19][20] also support that the interdecadal variations and recent changes in WNP TC activity are obviously seasonally dependent, suggesting possible different influential processes responsible for TC activity changes in different seasons.…”

Section: Introductionmentioning

confidence: 83%

A Contrast of Recent Changing Tendencies in Genesis Productivity of Tropical Cloud Clusters over the Western North Pacific in May and October

Peng

Wang

et al. 2021

Atmosphere

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Tropical cloud clusters (TCCs) are embryos of tropical cyclones (TCs) and may have the potential to develop into TCs. The genesis productivity (GP) of TCCs is used to quantify the proportion of TCCs that can evolve into TCs. Recent studies have revealed a decrease in GP of western North Pacific (WNP) TCCs during the extended boreal summer (July–October) since 1998. Here, we show that the changing tendencies in GP of WNP TCCs have obvious seasonality. Although most months could see recent decreases in GP of WNP TCCs, with October experiencing the strongest decreasing trend, May is the only month with a significant recent increasing trend. The opposite changing tendencies in May and October could be attributed to different changes in low-level atmospheric circulation anomalies triggered by different sea surface temperature (SST) configurations across the tropical oceans. In May, stronger SST warming in the tropical western Pacific could prompt increased anomalous westerlies associated with anomalous cyclonic circulation, accompanied by the weakening of the WNP subtropical high and the strengthening of the WNP monsoon. Such changes in background atmospheric circulations could favor the enhancement of atmospheric eddy kinetic energy and barotropic energy conversions, resulting in a recent intensified GP of WNP TCCs in May. In October, stronger SST warming in the tropical Atlantic and Indian Oceans contributed to anomalous easterlies over the tropical WNP associated with anomalous anticyclonic circulation, giving rise to the suppressed atmospheric eddy kinetic energy and recent weakened GP of WNP TCCs. These results highlight the seasonality in recent changing tendencies in the GP of WNP TCCs and associated large-scale atmospheric-oceanic conditions.

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“…The SCS is also a TC breeding ground and is separated from the BOB by the Indochina Peninsula. The TC activity over the SCS also has distinct seasonal features; boreal autumn TCs tend to move westward and strike the Indochina Peninsula, while boreal summer TCs usually move northwestward to make landfall in East Asia 12,13 . Therefore, TCs over the SCS may have a closer connection with TCs over the BOB after summer.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea

Wu,

Hu,

Lin

et al. 2023

npj Clim Atmos Sci

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Herein, we report a strong in-phase covariability of tropical cyclone (TC) activity between the Bay of Bengal (BOB) and the South China Sea (SCS) during October–December of 1979–2019, and which is also the dominant mode of BOB–SCS TC activity, accounting for 35% of the total variances in TC track density. This inter-basin TC covariance is closely linked to the anomalies of tropical sea surface temperature, appearing as the intrinsic Indo-Pacific Tripole mode, which significantly affects the atmospheric circulations overlying the BOB–SCS. Interestingly, this mechanism works via modulating the local TC genesis frequency in the BOB–SCS. However, in terms of the migrated TCs among them, the Indo-Pacific Tripole mainly regulates their genesis location but not their frequency. More importantly, such inter-basin TC covariability still exists significantly even when the TC track data migrating from the SCS into the BOB are excluded. After all, only 19 TCs during the 41 years (1979–2019) are observed to migrate from the SCS to the BOB, which can only contribute slightly to increasing the covariability of BOB–SCS TC-track activity, but do not play a dominant role. Further, the numerical simulations suggest that although both the Indian and Pacific Oceans contribute to the atmospheric anomalies that affect the BOB–SCS TC activity, the Pacific-effect is twice as important.

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Distinct Interdecadal Change Contrasts Between Summer and Autumn in Latitude‐Longitude Covariability of Northwest Pacific Typhoon Genesis Locations

Cited by 5 publications

References 44 publications

Season‐Dependent Modulation of Pacific Meridional Mode on Tropical Cyclone Genesis Over the Western North Pacific

Season‐Dependent Modulation of Pacific Meridional Mode on Tropical Cyclone Genesis Over the Western North Pacific

A Contrast of Recent Changing Tendencies in Genesis Productivity of Tropical Cloud Clusters over the Western North Pacific in May and October

Unraveling the strong covariability of tropical cyclone activity between the Bay of Bengal and the South China Sea

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