scholarly journals PEMODELAN DINAMIKA ARUS PERAIRAN INDONESIA YANG DISEBABKAN OLEH ANGIN

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Ika Kusumawati

Research on current dynamics modelling in Indonesian waters with wind employed as independent variable has been observed. The purpose of this study was to model the hydrodynamic equations due to the influence of the wind in Indonesia waters in the form of visualization described consisting of wind circulation pattern and pattern of current movement in the west and east monsoon season. To analyze the data obtained during the study, researchers used a descriptive approach. The results showed that the west wind season (December, January, and February) blow from the northeast to the southwest then turning southeast. Whereas the east wind season (June, July, and August) blows from the southeast to the northwest and then turn to the northeast. On the surface layer shows the current movement in general follows the movement of the wind direction in which the current speed is very dominant occurred in some waters, such as the Karimata Strait, the Java Sea, the South China Sea, and the Arafuru Sea. The dominant current velocity in the layer of 100-200 m in the water of eastern equator and the South China Sea in the west season has recorded a current speed reaches 20 cm / s. while in the east monsoon which occurs in the equatorial waters of the eastern part, in the Maluku Sea, the Seram Sea and nearby the Arafuru Sea current velocity reaches 40cm / s.

2015 ◽  
Vol 3 (1) ◽  
pp. 20-37
Author(s):  
Seokwoo Lee ◽  
Leonardo Bernard

States currently involved in maritime disputes in the South China Sea can learn from the experience of the Koreas in creating a framework for the “Special Peace and Cooperation Zone in the West Sea.” Like the nll, the maritime boundary issues in the South China Sea are unlikely to be resolved in the near future by direct negotiations. Formal adjudication, while a possibility, is probably unlikely. Clearly, war will benefit no one. Thus, the most viable alternative may be to pursue joint economic projects, similar to the West Sea Special Zone that will grant each party economic benefits while building confidence and reducing tension in the region.


2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Agung Riyadi ◽  
Nusa Idaman Said ◽  
Matih Santos

This paper describes some of the general condition of the oceanographic parameters in the Strait Matak, Anambas Archipelago. The data flow is obtained by direct measurement by using a current meter types RCM-7. Simulation models using Mike 21. Mike flow pattern is divided into two seasons, namely west season (January) and the east season (August) and flow patterns ahead of the tide when the season is generally moving west to wards the south, it demonstrates the role of strong tidal influence the movement of waterin the study area. Flow velocity in the strait just before the tide on the west season reaches 1m/s.  Flow patterns at high tide on the west season looks still moving toward sthe south. The maximum flow velocity in the strait when the tide reaches 0.32 m/s, while the average speed in the area of the model is 0.12 m/s. Low tide towards the current pattern is still moving towards the south, it reinforces the notion that in addition to tidal windsare also very significant role in moving the flow, in this case that the current is moving toward the south. Flow velocity just before low tide reaches 0.85 m/s. Flow patterns at low tide shows the differences in the three previous conditions, the current in the strait to move out to the north toward the South China Sea. In condition slow tide, the tida lmore dominantly than the wind, this proved to even though the wind toward the south, the currents inthestraitis moving toward snorth along the tidal flow leading to the South China Sea. Flow velocity is quite varied location of modeling; flow velocity at low tide reaches 0.5m/s, with the average 0.15 m/s. Keywords: current and direction, wind, tide, model.


1990 ◽  
Vol 76 (1) ◽  
pp. 49-51
Author(s):  
T. J. Hayes ◽  
D. Thomas ◽  
E. P. Dewar

AbstractPoor economic conditions in Vietnam have encouraged large numbers of people seeking a better life in the West to join the flow of political refugees leaving the country as “boat people”. We report the events surrounding one such group of people who were rescued from the South China Sea by the Outback 88 Task Group.


2011 ◽  
Vol 30 (3) ◽  
pp. 1-13 ◽  
Author(s):  
Qiang Wang ◽  
Yinxia Wang ◽  
Hong Bo ◽  
Weidong Zhou ◽  
Dongxiao Wang

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
Junxi Feng ◽  
Shengxiong Yang ◽  
Hongbin Wang ◽  
Jinqiang Liang ◽  
Yunxin Fang ◽  
...  

The Haima cold seeps are active cold seep areas that were recently discovered on the northwestern slope of the South China Sea (SCS). Three piston cores (CL30, CL44, and CL47) were collected within an area characterized by bottom simulating reflectors to the west of Haima cold seeps. Porewater profiles of the three cores exhibit typical kink-type feature, which is attributed to elevated methane flux (CL30) and bubble irrigation (CL44 and CL47). By simulating the porewater profiles of SO42-, CH4, PO43-, Ca2+, Mg2+, and dissolved inorganic carbon (DIC) in CL44 and CL47 using a steady-state reaction-transport model, we estimated that the dissolved SO42- was predominantly consumed by anaerobic oxidation of methane (AOM) at rates of 74.3 mmol m−2 yr−1 in CL44 and 85.0 mmol m−2 yr−1 in CL47. The relatively high AOM rates were sustained by free gas dissolution rather than local methanogenesis. Based on the diffusive Ba2+ fluxes and the excess barium contents in the sediments slightly above the current SMTZ, we estimated that methane fluxes at core CL44 and CL47 have persisted for ca. 3 kyr and 0.8-1.6 kyr, respectively. The non-steady-state modeling for CL30 predicted that a recent increase in upward dissolved methane flux was initiated ca. 85 yr ago. However, the required time for the formation of the barium front above the SMTZ at this core is much longer (ca. 2.2-4.2 kyr), which suggests that the depth of SMTZ possibly has fluctuated due to episodic changes in methane flux. Furthermore, using the model-derived fractions of different DIC sources and the δ13CDIC mass balance calculation, we estimated that the δ13C values of the external methane in cores CL30, CL44, and CL47 are -74.1‰, -75.4‰, and -66.7‰, respectively, indicating the microbial origin of methane. Our results suggest that methane seepage in the broader area surrounding the Haima cold seeps probably has persisted at least hundreds to thousands of years with changing methane fluxes.


Zootaxa ◽  
2017 ◽  
Vol 4306 (2) ◽  
pp. 287 ◽  
Author(s):  
MARIA ALEKSANDRA BITNER ◽  
MARCO ROMANIN

Three articulated brachiopod species have been recognized in material collected during the 2014 French-Taiwanese cruise DongSha to the South China Sea, NW Pacific: Terebratulina japonica (Sowerby, 1846), Macandrevia sp. and Nipponithyris afra Cooper, 1973. Nipponithyris afra is noted for the first time from the Northern Hemisphere and the genus Macandrevia is reported for the first time from the West Pacific. All species are reported for the first time from the South China Sea, extending their biogeographical range. 


2016 ◽  
Vol 36 ◽  
pp. 4
Author(s):  
Keat Gin Ooi

<p>The Malay Peninsula –or what is present day West/Peninsular Malaysia – shores are flanked on either side by the South China Sea on the east and the Straits of Malacca (Melaka) on the west, both essentially important sea-borne passages between the East and the West. By the first millennium BCE and the early part of the first millennium CE the Malay Peninsula possessed trading sites on the lower reaches of rivers and along the coasts. Complementing the peninsula’s strategic location was the seasonal monsoonal pattern that facilitated the comings and goings of merchant fleets enabling long-distant seaborne trade to develop. The peninsula acted as a ‘connector’ for the confluence of traders from East Asia to interact with counterparts from South and West Asia and within Southeast Asia. The Straits of Malacca was a pivotal passage of the Maritime Silk Route. A multitude of natural elements and man-made disasters (warfare in particular) resulted in shipwrecks in the Straits and the South China Sea. This paper shall revisit the beginnings of maritime archaeology in Malaysia, ascertain the players and the contemporary playing field, the benefits of this endeavour, look towards its developments, and envisage its future directions. </p>


Zootaxa ◽  
2009 ◽  
Vol 2088 (1) ◽  
pp. 24-30 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
FENG-JIAU LIN ◽  
TIN-YAM CHAN

A new mud shrimp species of the deepwater calocaridid genus Calastacus Faxon, 1893, C. inflatus, is described on the basis of a single specimen from the South China Sea off the Pratas Islands. It is unique in the genus in having a faint cervical groove on the carapace, lacking spiniform projection at the dorsolateral distal angle of the second segment of the antennal peduncle, the possession of only one spine on the ventral margin of the merus of the cheliped, and the unarmed suture on the uropodal exopod. With the addition of the present new species, two species of the genus are now known from the West Pacific.


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