scholarly journals Seasonal structures of upper layer circulation in the southern South China Sea from in situ observations

2002 ◽  
Vol 107 (C11) ◽  
Author(s):  
Wendong Fang
Keyword(s):  
South China Sea ◽  
South China ◽  
Southern South China Sea ◽  
China Sea ◽  
Upper Layer Circulation ◽  
In Situ Observations

Thermal fronts of the southern South China Sea from satellite and in situ data

2012 ◽  
Vol 33 (23) ◽  
pp. 7458-7468 ◽  
Author(s):  
Jinglong Yao ◽  
Igor Belkin ◽  
Ju Chen ◽  
Dongxiao Wang
Keyword(s):  
South China Sea ◽  
South China ◽  
Southern South China Sea ◽  
China Sea ◽  
In Situ Data

scholarly journals Near-Inertial Waves Induced by Typhoon Megi (2010) in the South China Sea

2021 ◽  
Vol 9 (4) ◽  
pp. 440
Author(s):  
Anzhou Cao ◽  
Zheng Guo ◽  
Yunhe Pan ◽  
Jinbao Song ◽  
Hailun He ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Vertical Direction ◽  
The South China Sea ◽  
Inertial Waves ◽  
The South ◽  
China Sea ◽  
Synoptic Wind ◽  
In Situ Observations

Near-inertial waves (NIWs) are a kind of internal wave, which are usually generated by synoptic wind forcing and play an important role in the oceanic energy budget. However, the lack of in situ observations limits our understanding of NIWs to some extent. Through a comparison with in situ observations, in this study, we first showed that the hybrid coordinate ocean model reanalysis results could reasonably reproduce the typhoon-induced NIWs, and we then adopted these data to investigate the NIWs induced by typhoon Megi in 2010 in the South China Sea (SCS). The results indicate that Megi-induced near-inertial kinetic energy was mainly concentrated in the SCS Basin. In the vertical direction, Megi-induced NIWs could propagate to 1000 m depth. The damping and modal content of Megi-induced NIWs were site-dependent: In the region near Megi’s track, NIWs were dominated by the first three baroclinic modes and damped quickly; whereas in two zones to the west of the Luzon Island and Luzon Strait, the e-folding time of Megi-induced NIWs could be longer than 20 days and higher modes (mode-4 to mode-7) were enhanced several days after the passage of Megi. Possible mechanisms of these phenomena were also explored in this study.

Contrasting Characteristics of Convection over the Northern and Southern South China Sea during SCSMEX

2006 ◽  
Vol 134 (4) ◽  
pp. 1041-1062 ◽  
Author(s):  
Paul E. Ciesielski ◽  
Richard H. Johnson
Keyword(s):  
South China Sea ◽  
South China ◽  
Kelvin Wave ◽  
Southern South China Sea ◽  
Rainy Period ◽  
Stratiform Rain ◽  
China Sea ◽  
Convective Systems ◽  
Early Afternoon ◽  
Dominant Feature

Abstract Observations from two enhanced sounding arrays during the May–June 1998 South China Sea Monsoon Experiment (SCSMEX) are used to determine and contrast the properties of convection over the northern and southern South China Sea (SCS). A regression analysis between SST data and monthly rainfall indicates that the ENSO signal exerted a strong influence on the rainfall distribution over the SCS during SCSMEX. This resulted in wetter-than-normal conditions along the south China coast and northern SCS, and generally drier-than-average conditions elsewhere, particularly over the Philippine Islands. The monsoon onset as determined by a shift in the low-level winds from easterly to southwesterly over the SCS occurred around mid-May. Over the southern enhanced sounding array (SESA), the onset was characterized by a rainy period associated with the passage of a convectively coupled Kelvin wave. This was followed by a weeklong break and then several episodic rain events with increasingly higher rain rates. Rainfall over the northern enhanced sounding array (NESA), which was largely out of phase with SESA rainfall events, occurred primarily during two 10-day periods separated by a weeklong break. Convective characteristics over the SESA, deduced primarily from heat and moisture budget profiles, indicate a high stratiform rain fraction consisting of alternating periods with decaying mesoscale systems that organized near the western Borneo coastline and shallower convective clouds. In contrast, NESA-averaged profiles were indicative of deep convection with a relatively small stratiform rain fraction, which was confirmed with radar analyses during the onset convective period. The diurnal cycle of convection is a dominant feature throughout much of the SCS. Over both budget regions, early morning (0500–0800 LT) convective systems were frequently initiated near the coasts, then gradually dissipated during the course of the day as the midlevel steering currents moved the systems away from the coastline. These decaying convective systems resulted in an early afternoon (1400 LT) rainfall peak over both sonde arrays.

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