Out-of-phase decadal changes in boreal summer rainfall between Yellow-Huaihe River Valley and southern China around 2002/2003

2015 ◽  
Vol 47 (1-2) ◽  
pp. 137-158 ◽  
Author(s):  
Yao Ha ◽  
Zhong Zhong ◽  
Haishan Chen ◽  
Yijia Hu
Keyword(s):  
Southern China ◽  
Summer Rainfall ◽  
River Valley ◽  
Boreal Summer ◽  
Huaihe River ◽  
Huaihe River Valley

scholarly journals Moisture source variations for summer rainfall in different intensity classes over Huaihe River Valley, China

2021 ◽  
Author(s):  
Yubo Liu ◽  
Chi Zhang ◽  
Qiuhong Tang ◽  
Seyed-Mohammad Hosseini-Moghari ◽  
Gebremedhin Gebremeskel Haile ◽  
...  
Keyword(s):  
Summer Rainfall ◽  
River Valley ◽  
Huaihe River ◽  
Moisture Source ◽  
Huaihe River Valley

scholarly journals Oceanic Forcings of the Interdecadal Variability in East Asian Summer Rainfall

2016 ◽  
Vol 29 (21) ◽  
pp. 7633-7649 ◽  
Author(s):  
Dong Si ◽  
Yihui Ding
Keyword(s):  
Yangtze River ◽  
Summer Rainfall ◽  
Yangtze River Valley ◽  
River Valley ◽  
Interdecadal Variability ◽  
Huaihe River ◽  
Huaihe River Valley ◽  
Leading Mode ◽  
Rainfall Anomalies ◽  
The 1960S

Abstract In this study, it was found that the Pacific decadal oscillation (PDO) and the Atlantic multidecadal oscillation (AMO) are shown to be the two major drivers of the interdecadal variability of summer rainfall over East Asia. The first leading mode (PC1) of this interdecadal variability—associated with an in-phase variation of rainfall anomalies along the Yangtze River valley and Huanghe–Huaihe River valley in China—is attributed to the PDO, while the second leading mode (PC2)—associated with seesawlike rainfall anomalies between the Yangtze River valley and Huanghe–Huaihe River valley—is attributed to the AMO. The AMO teleconnects its influence to the East Asian region, and beyond, through a circumglobal stationary baroclinic wave train extending from the Atlantic Ocean, through the Eurasian continent, and extending to North America. The AMO also altered the nature of the PDO through this atmospheric teleconnection, resulting in the occurrence of a different PDO pattern (“pseudo-PDO”) between the 1960s and 2010s. The pseudo-PDO has a different anomalous SST pattern in both the tropical and midlatitude Pacific compared to the conventional PDO. The pseudo-PDO causes a distinct atmospheric response in East Asia leading to an opposite relationship with the PC1 compared to the conventional PDO, thus leading to a change in the direction of the influence of the PDO on PC1 between the 1880s–1950s and the 1960s–2010s.

How East Asian westerly jet’s meridional position affects the summer rainfall in Yangtze-Huaihe River Valley?

2017 ◽  
Vol 51 (11-12) ◽  
pp. 4109-4121 ◽  
Author(s):  
Shixin Wang ◽  
Hongchao Zuo ◽  
Shuman Zhao ◽  
Jiankai Zhang ◽  
Sha Lu
Keyword(s):  
East Asian ◽  
Summer Rainfall ◽  
River Valley ◽  
Huaihe River ◽  
Huaihe River Valley

Predictability of the record-breaking rainfall over the Yangtze and Huaihe River valley in 2020 summer by the NCEP CFSv2

2022 ◽  
Vol 266 ◽  
pp. 105956
Author(s):  
Shankai Tang ◽  
Shaobo Qiao ◽  
Taichen Feng ◽  
Zhengxu Fu ◽  
Zhisen Zhang ◽  
...  
Keyword(s):  
River Valley ◽  
Huaihe River ◽  
Huaihe River Valley

scholarly journals Effect of Warm SST in the Subtropical Eastern North Pacific on Triggering the Abrupt Change of the Mei-Yu Rainfall over South China in the Early 1990s

2020 ◽  
Vol 33 (2) ◽  
pp. 657-673
Author(s):  
Yi-Kai Wu ◽  
An-Yi Huang ◽  
Chia-Kai Wu ◽  
Chi-Cherng Hong ◽  
Chi-Chun Chang
Keyword(s):  
South China ◽  
North Pacific ◽  
Western North Pacific ◽  
Abrupt Change ◽  
Phase Relationship ◽  
Summer Rainfall ◽  
Boreal Summer ◽  
The South ◽  
Abrupt Increase ◽  
Huaihe River Valley

AbstractIn the early 1990s, the mei-yu rainfall over South China in early boreal summer exhibited an abrupt change and northward extension. This change altered the pattern of East Asian summer rainfall from a dipole-like to a monopole-like pattern; that is, the out-of-phase relationship between the rainfall in the south and that in the north of the Yangtze and Huaihe River valley changed to an in-phase relationship. The physical processes potentially responsible for triggering this abrupt change were analyzed in this study. Our observations revealed that the western North Pacific subtropical high (WNPSH), sea surface temperature (SST) in the subtropical eastern North Pacific (SENP), and the mei-yu rainfall in South China exhibited an abrupt increase in the early 1990s, suggesting that these factors are correlated. From the observations and results of numerical experiments, we proposed that the abrupt SST warming in the SENP in the early 1990s generated an east–west overturning circulation anomaly in the Pacific Ocean and that the anomalous downward motion in the western North Pacific consequently triggered the abrupt increase and westward extension of the WNPSH in the early 1990s. The enhanced and westward extension of WNPSH created a low-level southeasterly anomaly that transported considerable humid and warm air into East Asia and sequentially triggered the abrupt increase of mei-yu rainfall in the South China in the early 1990s.

Subseasonal Predictions of Regional Summer Monsoon Rainfall over Tropical Asian Oceans and Land

2015 ◽  
Vol 28 (24) ◽  
pp. 9583-9605 ◽  
Author(s):  
Xiangwen Liu ◽  
Song Yang ◽  
Jianglong Li ◽  
Weihua Jie ◽  
Liang Huang ◽  
...  
Keyword(s):  
Lead Time ◽  
Large Scale ◽  
Southern China ◽  
Intraseasonal Oscillation ◽  
Summer Rainfall ◽  
Summer Monsoon Rainfall ◽  
Forecast Skill ◽  
Boreal Summer ◽  
Regional Rainfall ◽  
Local Rainfall

Abstract Subseasonal predictions of the regional summer rainfall over several tropical Asian ocean and land domains are examined using hindcasts by the NCEP CFSv2. Higher actual and potential forecast skill are found over oceans than over land. The forecast for Arabian Sea (AS) rainfall is most skillful, while that for Indo-China (ICP) rainfall is most unskillful. The rainfall–surface temperature (ST) relationship over AS is characterized by strong and fast ST forcing but a weak and slow ST response, while the relationships over the Bay of Bengal, the South China Sea (SCS), and the India subcontinent (IP) show weak and slow ST forcing, but apparently strong and rapid ST response. Land–air interactions are often less noticeable over ICP and southern China (SC) than over IP. The CFSv2 forecasts reasonably reproduce these observed features, but the local rainfall–ST relationships often suffer from different degrees of unrealistic estimation. Also, the observed local rainfall is often related to the circulation over limited regions, which gradually become more extensive in forecasts as lead time increases. The prominent interannual differences in forecast skill of regional rainfall are sometimes associated with apparent disparities in forecasts of local rainfall–ST relationships. Besides, interannual variations of boreal summer intraseasonal oscillation, featured by obvious changes in frequency and amplitude of certain phases, significantly modulate the forecasts of rainfall over certain regions, especially the SCS and SC. It is further discussed that the regional characteristics of rainfall and model’s deficiencies in capturing the influences of local and large-scale features are responsible for the regional discrepancies of actual predictability of rainfall.

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