Interdecadal change of the active‐phase summer monsoon in East Asia (Meiyu) since 1979

Wang, S.-Y. Simon; Lin, Yen‐Heng; Wu, Chi‐Hua

doi:10.1002/asl.603

Cited by 14 publications

(33 citation statements)

References 28 publications

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“…This is consistent with the finding of Wang et al . (). In terms of the historical climate (solid lines), TOP‐5 models depict a clear Meiyu phase, and its timing of peak precipitation is consistent with observation (from early May to late June), even though the simulated Meiyu magnitude is not as large.…”

Section: Resultsmentioning

confidence: 99%

“…The analysis presented herein follows the observational study of Wang et al . () and the modelling study of Wu et al . () to investigate the future changes of Meiyu in Taiwan, using the Couple Model Intercomparison Project Phase 5 (CMIP5) outputs of the historical and future RCP8.5 simulations.…”

Section: Discussionmentioning

confidence: 97%

“…For example, an early June 2017, a rainstorm embedded in the Meiyu frontal zone dumped 210 mm of rainfall over 3 hr in northern Taiwan, submerging two Taiwanese townships with US$9 million of agriculture loss. Wang et al (2016) found that Meiyu rainfall in Taiwan has intensified since 1990 while shifting later in the season (from late May to early June). Huang and Chen (2015) observed that Taiwan's Meiyu rainfall has transitioned from a predominately frontal regime to an increasingly convective regime.…”

mentioning

confidence: 99%

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Projected increase of the East Asian summer monsoon (Meiyu) in Taiwan by climate models with variable performance

Tung

Wang

Chu

et al. 2020

Meteorological Applications

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The active phase of the East Asian summer monsoon (EASM) in Taiwan during May and June, known as Meiyu, produces substantial precipitation for water uses in all sectors of society. Following a companion study that analysed the historical increase in the Meiyu precipitation, the present study conducted model evaluation and diagnosis based on the EASM lifecycle over Taiwan. Higher and lower skill groups were identified from 17 Couple Model Intercomparison Project Phase 5 (CMIP5) models, with five models in each group. Despite the difference in model performance, both groups projected a substantial increase in the Meiyu precipitation over Taiwan. In the higher skill group, weak circulation changes and reduced low‐level convergence point to a synoptically unfavourable condition for precipitation. In the lower skill group, intensified low‐level southwesterly winds associated with a deepened upper level trough enhance moisture pooling. Thus, the projected increase in Meiyu precipitation will likely occur through the combined effects of (1) the extension of a strengthened North Pacific anticyclone enhancing southwesterlies; and (2) more systematically, the Clausius–Clapeyron relationship that increases precipitation intensity in a warmer climate. The overall increase in the Meiyu precipitation projected by climate models of variable performance supports the observed tendency toward more intense rainfall in Taiwan and puts its early June 2017 extreme precipitation events into perspective.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

mentioning

confidence: 99%

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Projected increase of the East Asian summer monsoon (Meiyu) in Taiwan by climate models with variable performance

Tung

Wang

Chu

et al. 2020

Meteorological Applications

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“…Warming in the western Pacific likely increases the sensitivity of air-sea interactions, promoting a more energetic reaction to SST variation (e.g., Wang et al 2013), and this process can affect the impact of the Pacific QDO. Located near the boundary between the East Asian continent and the Pacific Ocean, the change in SST variations near Taiwan can alter (or shift) the circulation and precipitation distributions, affecting the local weather (e.g., Wang et al 2016). …”

Section: Possible Dynamicsmentioning

confidence: 99%

Decadal fluctuations in the western Pacific recorded by long precipitation records in Taiwan

2017

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“…A global climate simulation conducted at a horizontal resolution that is too low to resolve topographic effects and small-scale processes encounters an inevitable drawback in reproducing the East Asian climate (Lau and Ploshay, 2009;Li et al, 2015). Regarding the East Asian quasi-stationary precipitation during spring-early summer (Ding and Chan, 2005;Chiang et al, 2015), that is, spring persistent rains (Tian and Yasunari, 1998;Wan and Wu, 2007;Linho et al, 2008) through pre-Meiyu and Okinawa Baiu to Meiyu-Baiu (Chen et al, 2004;Srivastava et al, 2004;Okada and Yamazaki, 2012;Wang et al, 2016), in addition to the effects of the massive Tibetan Plateau (Sampe and Xie, 2010;Chen and Bordoni, 2014), mesoscale high mountains have received increasing attention because of their substantial effects on the synoptic-to-large-scale monsoon dynamics (Shi et al, 2008;Qi and Wang, 2012;Wang and Chang, 2012;Wu et al, 2014;Wu and Hsu, 2016).…”

Section: Introductionmentioning

confidence: 99%

East Asian presummer precipitation in the CMIP5 at high versus low horizontal resolution

Freychet

Chen

et al. 2017

Intl Journal of Climatology

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Inevitable drawbacks occur when the Asian monsoon is simulated at a horizontal resolution that is too low to resolve topographic effects and sub‐grid processes. By comparing the Coupled Model Intercomparison Project (CMIP) phase 5 simulations conducted at higher (∼1°) and lower (∼3°) horizontal resolutions, this study attempted to extend understanding of potential resolution limits in simulating the East Asian presummer climate. April–May is found to have considerable resolution‐dependent contrasts in position and strength of precipitation (spring rains and pre–Meiyu) among the simulations. The low‐resolution models cannot simulate ascending vertical motion over the mountainous regions in the southern Tibetan Plateau and subtropical East Asia, which coincides with the overestimation of the strength of the lower‐tropospheric westerly in 90°–105°E and of the downstream southerly in 110°–130°E. Because of the southerly wind bias, the East Asian presummer precipitation simulated in the low‐resolution models is lower in amount and located farther north compared with the observed and high‐resolution models. Despite distinct large‐scale climatology between April and late May, the East Asian precipitation contrasts in these two periods are similar between the high‐ and low‐resolution models, which could be possibly explained as a systematic response to resolution. Systematically less precipitation in the high‐resolution model compared with the low‐resolution model is also observable over the Maritime Continent, whereas a further connection to the East Asian precipitation simulation remains unclear. Regarding projected changes, the resolution‐dependent contrasts are also considerable; the contrasts further suggest potential regional interactions such as between the subtropical South and East Asia (10°–20°N).

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Interdecadal change of the active‐phase summer monsoon in East Asia (Meiyu) since 1979

Cited by 14 publications

References 28 publications

Projected increase of the East Asian summer monsoon (Meiyu) in Taiwan by climate models with variable performance

Projected increase of the East Asian summer monsoon (Meiyu) in Taiwan by climate models with variable performance

Decadal fluctuations in the western Pacific recorded by long precipitation records in Taiwan

East Asian presummer precipitation in the CMIP5 at high versus low horizontal resolution

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