Finally time series analysis and statistical analysis was conducted on 3 data sets.
Figure 1. TOPEX/Poseidon 10day repeat cycle tracks over the study area
Results and Discussion
Fig 2,3,4 shows the color-coded maps for the visual interpretation between the El Nino and non El Nino season.
Fig 2. Observed Monthly SST anomaly (a) a normal year, (b) an El Nino year
Fig 3. Surface Zonal wind, (a) a normal year, (b) an El Nino year
Fig 2 shows the abnormal patterns of temperature between the normal and El Nino season. During the El nino year, the cold are, in front of South America, almost disappeared. And the warm water occupying the East Pacific Ocean.
From the wind vector data, only U (zonal) component data was drawn as a color map (Fig 3). The weakening of easterly trade winds is evident between the El nino season and non El nino season.
Fig 4. Sea surface height, (a) a normal year, (b) an El Nino Year
Fig. 5. The surface Height behavior during the 2 years.
Fig 4 shows the sea surface height. During the El Nino season, in front of Eastern Pacific Ocean sea surface height increased significantly around 20 cm higher than normal season.
