Hydrographic data from the Gulf of Thailand (GoT) reveal two bottom saline water areas (BSWA1 and BSWA2) with salinity (S) ≥ 33.0 psu and where the water columns are highly stratified during December–January. Observational results from a seafloor acoustic doppler current profiler verify that the current is mainly dominated by a barotropic current. The monthly average sea-level-anomaly (SLA) and barotropic current vector maps confirm a cyclonic circulation in the northern GoT during November–January. The BSWA1 is located near the center of the cyclonic circulation. The BSWA1 and cyclonic circulation simultaneously enter their weakening phases, which suggests that the cyclonic circulation convergence plays a key role in maintaining the BSWA1. The BSWA2 occurs as a narrow strip concentrated along the eastern slope of the basin in the southern GoT during December–January. The southern GoT also has higher SLA and forms a congregation area of diluted water with S < 31.0 psu that enters from the north and south of this region during December–January.

泰国湾 (GoT) 的水文数据显示，盐度 (S) ≥ 33.0 psu 的两个底部咸水区（BSWA1 和 BSWA2）在 12 月至 1 月期间水体高度分层。海底声学多普勒海流剖面仪的观测结果证实海流主要由正压海流主导。月平均海平面异常 (SLA) 和正压流矢量图证实了 11 月至 1 月期间 GoT 北部的气旋环流。BSWA1 位于气旋环流中心附近。BSWA1 和气旋环流同时进入减弱阶段，这表明气旋环流辐合在维持 BSWA1 中起着关键作用。BSWA2 出现在 12 月至 1 月期间，集中在南部 GoT 盆地东坡的窄带。GoT 南部也具有较高的 SLA，并在 12 月至 1 月期间形成了 S < 31.0 psu 的稀释水聚集区，从该地区的北部和南部进入。