TOPOGRAPHY EFFECTS ON RAINFALL VARIATION AT SOUTH PAPUA REGION

• Main Author: CHRISTIANTO, DONY
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/15435
• Institution: Institut Teknologi Bandung

This paper contains the results of research in the area foothills of Cartenz, precisely in the area of 4.0o LS – 5.0o LS; 136.0o BT – 137.5o BT. From rainfall observation data during the period 1997 to 2012 ( 16 years ), it was recorded at one observation station rainfall per year is equal to 12,500 millimeters . By using TRMM, CCMP and Automatic Weather Station data, study was conducted to study mechanisms of rain formation including from where the supply mass of water vapor until it become rainfall in this area. <br /> <br /> <br /> By using PCA method, the greatest phenomena that influence on the study area is a local circulation that has a variation value of occurrence approximately 51 % and monsoon variation 22 % . Then from the diurnal weather elements in the study area can be concluded that the transport of water vapor coming from the ocean circulation carried by the sea breeze in the afternoon of the Arafura Sea area that located in the south. One factor that cause high rainfall is the areas of research was hindered by mountain ranges, so it becomes water vapor collector are. It is evidenced by the emerged of convective clouds, and areas with higher rainfall than the surrounding area.