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Journal : Journal of Geoscience, Engineering, Environment, and Technology

Impact on Extreme Rainfall and Flood Events during Boreal Summer Intraseasonal Oscillation (BSISO) in Aceh Province, Indonesia Qalbi, Harisa Bilhaqqi; Abdullah, Faisal; Ismail, Nazli
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 04 (2024): JGEET Vol 09 No 04 : December (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.04.19421

Abstract

The Boreal Summer Intraseasonal Oscillation (BSISO) is intraseasonal climate variability in addition to the Madden-Julian Oscillation (MJO) that affects weather and climate in the Indo-Pacific region including the Province of Aceh. The impact of BSISO on extreme rainfall and flooding in Aceh needs to be investigated to enhance preparedness, mitigation, and adaptation strategies against its negative impacts. The datasets use in situ daily rainfall data from 5 BMKG stations in Aceh and the BSISO indices (BSISO1 and BSISO2) during the extended boreal summer (May–October) period 2001–2020, as well as flood event data in Aceh from 2008–2020. The results of this study show that rainfall in Aceh province is influenced by BSISO variability and has the potential to increase extreme rainfall and even cause flooding in some areas in Aceh, depending on the propagation path of BSISO. The frequency of extreme rainfall in Aceh during BSISO is identified using daily rainfall beyond the 95th percentile in each BSISO phase, which increases the probability of extreme rainfall in Aceh by around 20–100% during phases 1-3 in both BSISO1 and BSISO2. During BSISO1, the probability of flooding in phases 1-3 increased by up to 90%, and BSISO2 also increased the probability of flooding in phases 1-4 by up to 72%.
Identifying the influence of El Nino Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) Phenomena on Rainfall in The Aceh Region, Indonesia Jannah, Miftahul; Ismail, Nazli; Asyqari, Amir; Indahsari, Fitriana N.; Abdullah, Faisal
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 04 (2024): JGEET Vol 09 No 04 : December (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.04.19582

Abstract

The interaction process between the atmosphere and the ocean that occurs in the Pacific Ocean and the Indian Ocean has a major impact on climate and weather conditions in Indonesia. The phenomenon that arises due to this interaction is known as El Nino - Southern Oscillation (ENSO). In addition to ENSO, other mechanisms also impact weather and climate change in Indonesia, including the Indian Ocean Dipole (IOD). This study aimed to analyze the effect of ENSO and IOD on rainfall in the Aceh region. The data used were CHIRPS rainfall data with the locations of four meteorological stations and one climatology station in Aceh, IOD index data and ENSO index data. Data processing in this study was carried out using Grid Analysis and Display System (GrADS) software and Spreadsheet for CHIRPS rainfall data, followed by processing ENSO index data and IOD index using Spreadsheet software. The analysis showed that the ENSO phenomenon has a longer occurrence than the IOD phenomenon. ENSO has a greater influence on rainfall in the Aceh region than IOD, especially La Nina, which has a weak to moderate correlation. Negative IOD and El Nino phenomena influence several observation points, but some stations do not show a correlation between rainfall and the index. The positive IOD phenomenon is strongly negatively correlated with rainfall at the observation station, which shows that positive IOD does not influence the Aceh region.
Co-Authors A, Bakhtiar Abdul Hamid Habbe, Abdul Hamid Abrar Muslim Ade Tinofa, Nelva Aida Imtihana, Aida Amelia, Marysha Aminuyati Andri Yadi Paembonan Andrian Kaifan Anwar Deli Asmaul Husna Asyqari, Amir Deli, Anwar Deni Saputra Dharma, Dian Budi Edy Miswar Edy Miswar, Edy Evi Yufita Fandana, Lisa Fanshury, Mohammed Agiel Poetra Farokh, Ida Maziyyatul Firman syah, Firman Fitri, Gustina Gani, Fauzi A. Gede Arya Putra, I Dewa Ghani, Azman Abdul Ghufron Hamzah Grefyolin Simbolon, Theresia Habibi, Roni Halim Zaini, Halim Herlambang, Saifuddin Hermita Arif Hesti Meilina Hosaini, Hosaini Ida Ayu Putu Sri Widnyani Indahsari, Fitriana N. Insyafrijal Insyafrijal Irawan, M. Ferry Irham Irham Iskandar Iskandar Ismail Ismail Juwanda, Juwanda Kamisnuddin, Kamisnuddin Khoirotun Nisa, Ani Kinar sih Kurniati Kurniati Lubis, Putri Handayani M. Yunus Marwan Marwan Masud, Anis Anshari Meisari, Yola Dyfa Miftahul Jannah Miswar, Khairul Moebaraq, T Ridzky Mohamad Faqihudin Musyafa Muhammad Irham Muhammad Irham Muhammad Nasir Muhammad Riandi Muhammad Riandi, Muhammad Muhammad Ridha Adhari, Muhammad Ridha Muhammad Rusdi Muhammad Rusdi Muhammad Yanis Muhammad Yusuf Muhammad, Mediaty Muhibbuddin Muhibbuddin Munardy, Munardy Muslim*, Abrar Muzakir Nahar, Nahar Nazli Ismail Nazri bin Nordin, Ts. Saiful Nisa, Ani Khoirotun Nopita Sari Noptario Noptario, Noptario Nugraha, Gartika Pardi Pardi, Pardi Prayoga, Doni Putri, Nadya Syafira Qalbi, Harisa Bilhaqqi Rahman, Supandi Rajibussalim Rajibussalim Raupu, Mutiara Rifqi Syahputra Rinaldi Idroes Riyadhsyah, Riyadhsyah Ruhana, Ruhana Sabani, Tria Asri Nur Sahabi, Ansar Saiful Saiful Siregar, Anne Novia Duana Subiyantoro, Fitrohim Sugianto Sugianto Suhendrayatna Suhendrayatna Sukmawati, Siti Supardin Supardin, Supardin Syafrial Fachri Pane, Syafrial Fachri Syafruddin Syafruddin Syaifuddin Syaifuddin Syaifuddin, Muh. Syarif Syarif Teuku Maimun Tika, Aulia Saufayuk Tinofa, Nelva Ade Utami, Rizky Yunus, Yuhanis Yusniyanti, Erna Zariansyah, Zariansyah Zulfalina, Zulfalina