ANALISIS SIKLON TROPIS NOCK-TEN BERBASIS DATA SATELIT HIMAWARI

Abstract

Nock-Ten tropical cyclone across the Philippines on 25-26 December 2016 was categorized as the super typhoon. In meteorological scale, tropical cyclone is included in the synoptic-scale phenomena. The impact could affect atmospheric conditions in Indonesian region, especially for tropical cyclones that formed in the Southwestern Pacific Ocean and the Indian Ocean north of Australia. Therefore, there should be monitoring the activities because it affects the dynamics of the atmosphere triggering the strong winds and rain clouds.This study aimed to analyze the growth, movement, and intensity of Typhoon Nock-Ten by using infrared channel of Himawari 8 satellite data. The methods used in the paper are convective index analysis by using TBB data (Temperature of the black body) as the temperature of the cloud tops and visual observation method based on Dvorak technique to monitor the development and movement of the cyclone, and to determine T-Number that can be used to predict the intensity in the form of maximum wind speed and minimum pressure of the cyclone. Based on the analysis of the temperature of the cloud tops of the Nock-Ten tropical cyclone obtained high convective index values ranged from 49.9 to 74.4. Nock-Ten tropical cyclones have a life span of 8 days, formed in the Pacific Ocean north of Papua in the form of MCS (Mesoscale Convective System) on 20 December 2016, propagating westward and dissipated on 28 December 2016. The maximum intensity occurred on 25 December 2016 at 00.00 UTC with T-Number reached 7.0 with the estimated maximum winds of 140 knots and a minimum air pressure reached 898 hPa, equivalent to a category 5 tropical cyclone on the Saffir-Simpson scale.