scholarly journals Characteristics of the South China Sea Monsoon from the Onset to Withdrawal before and after 1993/94

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Zhao Xiaofang ◽  
Wang Lijuan
Keyword(s):  
South China Sea ◽  
South China ◽  
Early Onset ◽  
Late Onset ◽  
Southern China ◽  
The South China Sea ◽  
Rain Belt ◽  
China Sea ◽  
Before And After ◽  
Onset Period

The characteristics and possible impact factors of the South China Sea summer monsoon (SCSSM) evolution from onset to withdrawal before and after 1993/94 are investigated using ERA-Interim, CPC rainfall, and OLR data. During the late-onset period of 1979–1993, the SCSSM was characterized by stronger onset intensity and a gradual withdrawal, resulting in a continuous, strong preflood season in Southern China and a slower rain-belt retreat from north to south China in September. In addition, the rain-belt in the Yangtze River basin persisted much longer during summer. However, during the early-onset period in 1994–2016, the SCSSM is associated with a weaker onset intensity and comparatively faster retreat. The advanced preflood season lasted intermittently throughout May and the whole eastern China precipitation lasted until October when it retreated rapidly, making the rain-belt in Southern China persist for an extended duration. Further analysis indicates that a strong modulation of SCS intraseasonal oscillation (ISO) on the SCSSM evolution is observed. There are two active low-frequency oscillations over the SCS in summer during the late-onset period but three during the early-onset period. The wet ISO in the Northwest Pacific propagating northwestward into the SCS and enhanced SCSSM ISO activity may contribute to the early onset and faster withdrawal after 1993/94. The effect of warm western Pacific sea surface temperatures (SST) on the SCSSM evolution is also discussed.

scholarly journals Chinese Assertiveness in the South China Sea and Southeast Asian Responses

2011 ◽  
Vol 30 (2) ◽  
pp. 77-104 ◽  
Author(s):  
Carlyle A. Thayer
Keyword(s):  
South China Sea ◽  
South China ◽  
The United States ◽  
The Philippines ◽  
The South China Sea ◽  
Commercial Fishing ◽  
The South ◽  
China Sea ◽  
Asean Member ◽  
Before And After

This article reviews Chinese assertive behaviour towards the Philippines and Vietnam over South China Sea issues in 2011. The article compares and contrasts Chinese diplomatic behaviour in the period before and after the adoption by ASEAN member states and China of Guidelines for the Implementation the Declaration on Conduct of Parties in the South China Sea in July. In the first period China aggressively asserted its claims to sovereignty by interfering with commercial fishing and oil exploration activities of vessels operating in the Exclusive Economic Zones of Vietnam and the Philippines. Both states resisted Chinese actions. The Philippines allocated increased funding for defence modernization, lobbied ASEAN states and shored up its alliance with the United States. Vietnam too protested Chinese action and undertook symbolic steps to defend national sovereignty. In the second period all states moved to contain South China Sea tensions from affecting their larger bilateral relations. It remains to be seen, however, if proposed confidence building measures will ameliorate Chinese assertiveness.

scholarly journals How can 30–60-day ISO move from the South China Sea to Southern China?

2020 ◽  
Vol 54 (7-8) ◽  
pp. 3613-3626
Author(s):  
Bin Zheng ◽  
Yanyan Huang ◽  
Chunhui Li ◽  
Ailan Lin
Keyword(s):  
South China Sea ◽  
South China ◽  
Southern China ◽  
The South China Sea ◽  
The South ◽  
China Sea

scholarly journals Climate shift of the South China Sea summer monsoon onset in 1993/1994 and its physical causes

2019 ◽  
Vol 54 (3-4) ◽  
pp. 1819-1827
Author(s):  
Ailan Lin ◽  
Renhe Zhang
Keyword(s):  
South China Sea ◽  
South China ◽  
North Pacific ◽  
Early Onset ◽  
Western North Pacific ◽  
The South China Sea ◽  
The South ◽  
Climate Shift ◽  
China Sea ◽  
Zonal Winds

AbstractThe characteristics of anomalous circulations during spring associated with the climate shift of the South China Sea summer monsoon (SCSSM) onset in 1993/1994 and its physical causes are investigated. It is found that the interdecadal shift of SCSSM onset happened in 1993/1994 is related closely to the 850 hPa zonal wind anomalies over the area around Kalimantan Island. Easterly (westerly) anomalies over Kalimantan Island enhance (weaken) subtropical high over the western North Pacific, leading to the late (early) onset of SCSSM in 1979–1993 (1994–2013). The sea surface temperature anomalies (SSTAs) in the key region 140°–150° E, 5° S–2.5° N influence the interdecadal change of zonal winds over Kalimantan Island. The positive SSTAs over this key region in 1994–2013 force convergence toward the region at low-level and form significant westerly anomalies near Kalimantan Island located to the west of the key region. The negative anomalies of meridional gradient of zonal winds over the South China Sea region increase the atmospheric vorticity over there significantly and result in the weakening and retreating eastward of the subtropical high over the western North Pacific, which is conducive to the early onset of SCSSM.

Relationship between the South China Sea summer monsoon withdrawal and September–October rainfall over southern China

2019 ◽  
Vol 54 (1-2) ◽  
pp. 713-726 ◽  
Author(s):  
Peng Hu ◽  
Wen Chen ◽  
Shangfeng Chen ◽  
Yuyun Liu ◽  
Ruping Huang ◽  
...  
Keyword(s):  
South China Sea ◽  
Summer Monsoon ◽  
South China ◽  
Southern China ◽  
The South China Sea ◽  
The South ◽  
China Sea

Insights into potential submarine landslide tsunamis in the South China Sea: A comparative study of the Baiyun Slide and the Brunei Slide

2020 ◽  
Author(s):  
Linlin Li ◽  
Qiang Qiu ◽  
Fengyan Shi ◽  
Gangfeng Ma
Keyword(s):  
South China Sea ◽  
South China ◽  
Southern China ◽  
River Mouth ◽  
The South China Sea ◽  
Pearl River Mouth Basin ◽  
Submarine Landslides ◽  
The South ◽  
Tsunami Waves ◽  
China Sea

<p>We investigate the sliding dynamics of two giant submarine landslides and their tsunamigenic capacity in the South China Sea (SCS) region: the Baiyun slide in the Pearl River Mouth Basin and the Brunei Slide in Northwest offshore Brunei. The two slides have comparable sizes with the estimated volumes of 1035 km<sup>3</sup> for Baiyun Slide versus 1200 km<sup>3</sup> for Brunei Slide and areas of 5500 km<sup>2</sup> versus 5300 km<sup>2</sup>. Based on the available geophysical observations, we construct hypothetical scenarios for both slides. By treating the slides as translational mudflow, we are able to reproduce the observed run-out distribution of the Baiyun Slide. The sliding speeds of the failed material could reach 25~35 m/s in both slide events. Both slides could generate devastating tsunamis in the SCS although the tsunamigenic capacity of the Brunei Slide is significantly larger than the Baiyun Slide. Through a series of numerical experiments, we demonstrate that the steepness of the slope and initial water depth of the slides play the key role of determining their tsunamigenic capacity. The tsunami generated by the Baiyun Slide mainly affects the northern part of the SCS. Coastlines including the southern China, central Vietnam, western Philippines suffer the highest tsunami waves.  The tsunami waves generated by the Brunei Slide causes significant impact in northern coasts of Borneo Island, coasts of central and southern Vietnam and Palawan.</p>

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