CHARACTERISTICS AND VARIATIONS OF MESOSCALE CONVECTIVE COMPLEX OVER THE MARITIME CONTINENT DURING EL NINO AND LA NINA CONDITIONS

• Main Author: Tio Faizin, Mohamad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42504
• Institution: Institut Teknologi Bandung

El Nino and La Nina (conventional and Modoki) phenomena have varied impacts globally including on convection activities. In the Maritime Continent, convection activities have a variety of scales from local to mesoscales. One example of mesoscale convection activity in Maritime Continent is MCC. Mesoscale Convective Complex (MCC) is a cloud organization that has an area of more than 50,000 km2, eccentricity of more than 0.7 and a life span of more than 6 hours. This study examines the differences in characteristics (area, duration, eccentricity) and variations (number, distribution) of MCC occurred in the Maritime Continent during El Nino and La Nina conditions. MCC identification was carried out using image processing algorithm called GTG algorithm (Grab ‘Em Tag ‘Em Graph ‘Em) for each specific El Nino and La Nina conditions in the DJF and JJA periods during 2000-2017. In general, MCC was significantly more frequent during the La Nina condition than in the El Nino condition. The frequency of MCC events during El Nino conditions was greater in the DJF period compared to JJA and vice versa during La Nina conditions. Both El Nino and La Nina conditions had an impact in the form of MCC enhancement compared to neutral conditions. The area of MCC increases and decreases drastically under the conditions of EK-JJA and LM-DJF consecutively. At El Nino-La Nina, the MCC is more circular than in neutral conditions. The longest duration of MCC occurs during EK-JJA conditions.