Inter‐decadal change of leading pattern of spring rainfall over southern China during 1901–2010

Zou, Cheng; Qiao, Yunting; Jian, Maoqiu; Siems, Steven T.

doi:10.1002/joc.5511

Cited by 8 publications

(6 citation statements)

References 21 publications

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“…The results are consistent with previous studies of interdecadal variations in winter and spring rainfall over South China (e.g., Cheng et al. 2018; Choi et al. 2016; X. F. Wu and Mao 2016; Xu et al.…”

Section: Discussionsupporting

confidence: 93%

Interdecadal Variation of Early Spring Rainfall Over the Southeastern Edge of the Tibetan Plateau

2021

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The Tibetan Plateau (TP) is known for its influence on the weather and climate of Asia (e.g., Boos & Kuang, 2010; G. X. Wu et al. 2012; and references cited therein). Previous studies have focused on the dynamic and thermal effects of the Himalayas and the main body of the TP. For example, Yeh et al. (1957) found that the TP provides about 2 K day −1 sensible heat to warm the troposphere across its surface in boreal summer. Yanai et al. (1992) and C. P. Li and Yanai (1996) suggested that the supply of sensible heat from the TP surface in spring results in the reversal of the land-sea temperature contrast and drives the vertical monsoon circulation. Wu et al. (1997) proposed the sensible heat pump effect of the TP, and Wu et al. (2007, 2012) further addressed the impact of the TP thermal condition on the Asian summer monsoon. According to the theories of convective quasiequilibrium (Boos & Emanuel, 2009; Emanuel et al. 1994; Molnar & Emanuel, 1999), Boos and Kuang (2010) found that the mountains south and west of the TP produce strong South Asian monsoon by insulating the thermal maximum over India from the extratropics. Rajagopalan and Molnar (2013) suggested that the TP thermal condition, as represented by the moist static energy of the atmosphere, is correlated with monsoonal rainfall in the early and late monsoon season. Note that above-mentioned studies are associated with the climate effects of the Himalayas or the main part of the TP. However, there are few studies on the southeastern edge of the TP (SEETP). The SEETP is characterized by distinctive terrain, where the east-west oriented Himalayas merge with the north-south oriented Hengduan Mountains (Figures 1a and 1b; Onogi et al., 2007; Kobayashi et al., 2015). The south-north oriented mountains have a barrier function on the prevailing southwesterly winds during the whole year, and those deep valleys play as corridors which let water vapor transport from Indian Ocean to high-latitude areas (Pan et al. 2012). As a result of this particular topographical pattern, the early spring flood over the SEETP generally starts in February during the peach blossom season (red and blue bars in Figure 1c; D.

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Section: Discussionsupporting

confidence: 93%

Interdecadal Variation of Early Spring Rainfall Over the Southeastern Edge of the Tibetan Plateau

2021

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“…Compared with summer precipitation, the research that focuses on spring [March-May (MAM)] precipitation is less. However, in southern China, spring is also a significant rainy season (Cheng et al 2018). Wu and Mao (2016) noted that the MAM total rainfall exceeds 500 mm over South China, contributing more than 35% of the annual total precipitation over this area (Yang and Lau 2004).…”

Section: Introductionmentioning

confidence: 99%

Interdecadal Change in the Intensity of Interannual Variation of Spring Precipitation over Southern China and Possible Reasons

Qiao

Jian

2019

Journal of Climate

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The intensity of interannual variation of spring precipitation over southern China during 1979–2014 and possible reasons for it are investigated in this paper. There is a significant interdecadal change in the intensity of interannual variation of spring precipitation over southern China around 1995/96. The intensity of interannual variation of spring rainfall over South China is stronger during 1979–95 than that during 1996–2014. The possible reason may be the larger amplitude of the sea surface temperature anomaly (SSTA) in the western Pacific Ocean (WP) before 1995/96. The cooler (warmer) SSTA in WP may trigger an abnormal local anticyclone (cyclone) at lower levels. The anomalous southwesterly (northeasterly) flow at the northwestern flank of the WP anticyclone (cyclone) covers South China, transporting more (less) moisture to South China. Meanwhile, the anomalous winds converge (diverge) in South China at lower levels and diverge (converge) at upper levels, which causes the anomalous ascent (descent) to enhance (reduce) the precipitation over there. However, during 1996–2014, the intensity of interannual variation of spring rainfall over the middle and lower reaches of the Yangtze River valley becomes much stronger than that during 1979–95, which is related to the intensified interannual variation of the atmospheric circulation in the middle and high latitudes over Eurasia. The weak (strong) Siberian high and East Asian trough may reduce (enhance) the northerly wind from the middle and high latitudes. As a result, the middle and lower reaches of the Yangtze River valley are subjected to the anomalous southerly wind, favoring more (less) precipitation over there.

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“…In some decadal epochs, eastern‐type El Niño can generate a southward East Asian jet stream (EAJS) and WNPA, which is favorable for exerting ascending motions and consequent heavy rainfall over South China. In some other epochs, the mid‐to‐high latitude forcing resembling the Eurasian teleconnection wave trains leads to a northward shift of the WNPA, which results in heavy rainfall over the Yangtze River (Cheng et al., 2018). This climate pattern is associated with central Pacific sea surface temperature (SST) warming, indicating distinctive remote impacts of different types of El Niño.…”

Section: Introductionmentioning

confidence: 99%

Heavy Southern China Spring Rainfall Promoted by Multi‐Year El Niño Events

Zhong

Yang

et al. 2023

Geophysical Research Letters

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Southern China spring rainfall (SCSR, 108°E−122°E, 21°N-30°N) with an onset time in March experiences a transitional feature from a dry winter to a rainy summer, with a rainband extending northward from South China to the Yangtze River (LinHo et al., 2008). It is also named the spring persistent rain (Tian & Yasunari, 1998;Wan & Wu, 2007), which is crucial for spring sowing and disaster warnings. Heavy SCSR humidifies the soil, reduces soil water storage capacity, and increases the risk of floods caused by summertime heavy rainfall. The SCSR contributes more than 35% of the annual total precipitation in this region, which is equivalent to the contribution of summer rainfall (X. Wu & Mao, 2016;Yang & Lau, 2004). The SCSR possesses large interannual variability (X. Wu & Mao, 2016), being consistent with the principal period of the El Niño-Southern Oscillation (ENSO) and the East Asian monsoon (EAM). Two possible indicators for the SCSR are therefore provided. The predictability of SCSR based on ENSO and EAM has been discussed by a variety of research work (Feng & Li, 2011;

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Inter‐decadal change of leading pattern of spring rainfall over southern China during 1901–2010

Cited by 8 publications

References 21 publications

Interdecadal Variation of Early Spring Rainfall Over the Southeastern Edge of the Tibetan Plateau

Interdecadal Variation of Early Spring Rainfall Over the Southeastern Edge of the Tibetan Plateau

Interdecadal Change in the Intensity of Interannual Variation of Spring Precipitation over Southern China and Possible Reasons

Heavy Southern China Spring Rainfall Promoted by Multi‐Year El Niño Events

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