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Lizalidiawati Lizalidiawati
Universitas Bengkulu
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Wind Variability and its Impact on IOD and MJO Phenomena in Western Waters Ahmad Syamsudin Tohari; Lizalidiawati Lizalidiawati; Irkhos Irkhos
Academia Open Vol 8 No 1 (2023): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.8.2023.7176

Abstract

This study investigates the interplay between wind variability and the Indian Ocean Dipole (IOD) and Madden-Julian Oscillation (MJO) phenomena in the western waters of Sumatra during the period 1982-2021. Utilizing monthly average wind data from satellite images, the research employs a comprehensive approach involving GrADS, Microsoft Excel, Surfer, Matlab, and Panoply software for data processing. The analysis reveals distinct wind patterns and varying IOD and MJO phases, with notable instances such as a positive IOD in October 1982 and a negative IOD in March 1983, coupled with strong MJO activity in February 1982 and weak activity in October 1983. This research underscores the significant influence of wind conditions on the dynamics of IOD and MJO phenomena in the studied region, contributing to a deeper understanding of ocean-atmosphere interactions. Highlight: Temporal Analysis: This study examines wind variability's interplay with IOD and MJO phenomena over three decades, revealing distinct patterns and phases in the western waters of Sumatra. Comprehensive Approach: Utilizing advanced software tools, the research processes satellite-derived wind data, shedding light on the complex dynamics of ocean-atmosphere interactions. Phenomena Dynamics: Notable occurrences, including positive and negative IOD events and varying MJO strengths, emphasize the profound impact of wind conditions on shaping the behavior of these critical climate phenomena, contributing to enhanced understanding and prediction. Keyword: Wind Variability, Indian Ocean Dipole (IOD), Madden-Julian Oscillation (MJO), Ocean-Atmosphere Interactions, Western Sumatra
Dynamic Variability of Geostrophic Currents in the Western Sumatra Waters: Insights from Altimetry Satellite Data Nelva Pebryanty Regina Simbolon; Lizalidiawati Lizalidiawati; Chandra Kurniawan
Academia Open Vol 8 No 1 (2023): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.8.2023.7217

Abstract

The Western Sumatra Waters experience significant influence from mass differentials between the Indian Ocean and Pacific Ocean, resulting in intricate oceanic circulations. This study focuses on geostrophic currents, vital for global climate dynamics, aiming to analyze their distribution and extreme occurrences. Using monthly-averaged geostrophic current data from 2018 to 2020 obtained via Altimetry Satellite imagery, the analysis reveals variations in velocity, magnitude, and direction across months. A notable peak velocity of 1.2 m/s in May 2020 and a minimum velocity of 0.1 m/s in June 2020 are highlighted, offering insights into their complex dynamics and implications for the region's oceanic processes and global climate dynamics. Highlight: Oceanic Interplay: The study highlights the profound influence of mass differentials between the Indian Ocean and Pacific Ocean on intricate oceanic circulations in the Western Sumatra Waters. Geostrophic Current Dynamics: Examining geostrophic currents as a crucial element of global climate dynamics, the research reveals significant variations in velocity, magnitude, and direction across different months. Peak and Minimum Instances: Notable instances are identified, such as the May 2020 peak with currents dispersing from west to southeast, and the June 2020 minimum characterized by erratic directional behavior, shedding light on specific temporal patterns. Keyword: Geostrophic Currents, Oceanic Circulations, Climate Dynamics, Western Sumatra Waters, Altimetry Satellite Data
Co-Authors Ahmad Syamsudin Tohari Chandra Kurniawan Irkhos Irkhos Nelva Pebryanty Regina Simbolon