ช่อทิพย์ ศิวพรอนันต์. An Investigation of Sea Level in the Gulf of Thailand and the South China Sea by Using Numerical Ocean Models. Doctoral Degree(Applied Mathematics). King Mongkut's University of Technology Thonburi. KMUTT Library. : King Mongkut's University of Technology Thonburi, 2011.
An Investigation of Sea Level in the Gulf of Thailand and the South China Sea by Using Numerical Ocean Models
Abstract:
In this study, the sea levels in the Gulf of Thailand (GoT) and the South China
Sea (SCS) covering 900E to 1300E and 50S to 300N are investigated. The data
used in this study are sea level from observation during 1977 to 2007 and results
from numerical ocean models during 1985 to 2004. Many methods are used in this
study: least square linear regression, periodic cubic spline approximation, empirical
orthogonal function (EOF), wavelet analysis and wavelet coherence. The results
show that the sea level has risen in the GoT and the SCS, especially in the upper
part of the GoT. The two highest rising rates of sea level are 19.02 mm/yr and 15.36
mm/yr. Results of EOF reveal that the first two modes and the first three modes
of observations and results from numerical ocean models explain more than 89%
and 71% of total variance in the GoT and the SCS, respectively. The relationships
of observation and results from numerical ocean models have high correlation in
some periods and some areas. The highly coherent from both date occur during the
extreme events.