Universiti Teknologi Malaysia Institutional Repository

Sea surface current circulation pattern in the South China Sea derived from satellite altimetry

Idris, Nurul Hazrina and Seeni Mohd., Mohd. Ibrahim (2007) Sea surface current circulation pattern in the South China Sea derived from satellite altimetry. In: Asian Conference on Remote Sensing, Kuala Lumpur Malaysia, 12-17 November 2007 , PWTC, Kuala Lumpur.

[img] PDF
Restricted to Repository staff only

215Kb

Abstract

Sea surface currents and circulation patterns can be estimated globally and in a continuous manner using satellite radar altimeters. This study is concerned with the surface current circulation pattern in the South China Sea. The main data utilized are the tidal amplitudes from co-tidal charts, the sea level anomaly and the wind speed from the Jason-1 satellite altimetry data. Algorithms used to estimate the surface current are the geostrophic current algorithms, the wind-driven current algorithms and the tidal current algorithms. The derived surface currents from these models were combined to produce the total surface current. Maps of surface current circulation pattern are produced for four periods, which are the northeast monsoon, the southwest monsoon and the inter monsoon periods of April and October in 2004 and in 2005. In order to validate the derived surface current, the correlation coefficient with field measurement data was determined. The field data are measured using Lagrangian buoys under the Data Buoy Cooperation Panel programme (DBCP) and also from the Japanese Oceanography Data Center (JODC). In this study, it was found that the correlation of total surface current speed and direction is reasonable with coefficient of 0.9 and 0.8, respectively. As for the total surface current circulation pattern, the currents in the South China Sea move southward during the northeast monsoon and reversed during the southwest monsoon period. In general, during the northeast and southwest monsoon, the water moved in anticlockwise and clockwise directions, respectively.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:altimetry, geostrophic current, South China Sea, tidal current, wind-driven surface current
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Geoinformation Science And Engineering (Formerly known)
ID Code:4644
Deposited By: En. Tajul Ariffin Musa
Deposited On:11 Dec 2007 06:56
Last Modified:10 Apr 2012 01:45

Repository Staff Only: item control page