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Achmad Supandi
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INDONESIA
Jurnal Widya Climago
Published by Badan Meteorologi, Klimatologi, dan Geofisika
ISSN : 27147924     EISSN : 27970078     DOI : https://doi.org/10.31172/jwc
Core Subject : Humanities, Education, Social,
Humanities Education Social Sciences Other
Jurnal WIdya Climago menerima naskah Karya Tulis Ilmiah (KTI) dari para widyaiswara, Peneliti, Dosen, Pejabat Fungsional tertentu lainnya serta Penulis Umum. Naskah KTI yang dapat diterbitkan pada Jurnal Widya Climago adalah naskah KTI berjenis kajian (research) Bidang Kewidyaiswaraan : Pelatihan Kurikulum Pembelajaran Evaluasi Bidang Pengembangan Kompetensi SDM: Sumber Daya Manusia Manajemen Bidang Teknis Pemberdayaan Masyarakat: Meteorologi Klimatologi & Kualitas Udara Geofisika
Arjuna Subject : Umum - Umum
Articles 63 Documents
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UJI KORELASI PARAMETER INDEKS RASON TERHADAP PEMBENTUKAN PETIR DI KEPULAUAN TANIMBAR Prawiro Adiredjo, Indra
Jurnal Widya Climago Vol 6 No 2 (2024): Developing Human Resource Competencies in Climate Analysis and Learning Innovatio
Publisher : Pusdiklat BMKG

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Abstract

Several meteorological practitioners have utilized machine learning techniques to forecast adverse weather conditions, particularly lightning occurrences. Upper air data, obtained through radiosonde measurements, is frequently employed to train machine learning models due to its ability to capture atmospheric instability. Despite its common usage, radiosonde-based lightning predictions typically have a validity window of 6-12 hours. However, cumulonimbus cloud formation in tropical regions, the primary source of lightning, typically lasts between 30 minutes to 1-2 hours per phase, casting doubt on the efficacy of radiosonde data for longer-term predictions. Furthermore, variations in local atmospheric patterns result in non-uniform utilization of radiosonde index parameters across different regions. Understanding the relationship between these parameters and lightning events is crucial for atmospheric thermodynamic analysis and region-specific prediction model development. This study examines the correlation between radiosonde index parameters in the Tanimbar Islands and lightning events from cumulonimbus clouds, utilizing indices such as KI, LI, SI, TT, CAPE, and CIN. Results suggest that index sustainability does not consistently correlate with lightning formation, with differing validity periods observed for 3 and 6 hours ahead. The reason index parameters in the form of SI, KI, and TT are only valid for predicting 3 hours ahead during the months of March-April-May, while only KI maintains validity for both 3 and 6 hours ahead at certain times.
Pengaruh El Nino-Southern Oscillation (ENSO) dan Madden-Julian Oscillation (MJO) Terhadap FREKUENsi Siklon Tropis di Indonesia Pada Periode Angin Monsun Baratan samoria, yakubos
Jurnal Widya Climago Vol 6 No 2 (2024): Developing Human Resource Competencies in Climate Analysis and Learning Innovatio
Publisher : Pusdiklat BMKG

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Abstract

Tropical cyclones have occurred frequently in the Indonesian region and its vicinity, where these tropical cyclones have significant impacts on the atmospheric conditions in the traversed areas. Tropical cyclones have occurred prominently in the Indonesian region, especially during the western monsoon period. The El Niño-Southern Oscillation (ENSO) and Madden-Julian Oscillation (MJO) are factors that modulate tropical cyclones. Not all tropical cyclones occurring during the western monsoon period are accompanied by the same ENSO and MJO periods. Therefore, this study aims to determine the extent to which the presence of ENSO and MJO influences the existence of tropical cyclones during the western monsoon period in the Indonesian region. Based on tropical cyclone data from 1989 to 2018, there have been a total of 363 tropical cyclone occurrences within the research boundaries of 900 E to 1600 E and 200 N to 200 S. Of these, 169 events occurred in the southern hemisphere (SH) and 194 events in the northern hemisphere (NH). The grouping of tropical cyclones was conducted as a method to understand the extent of tropical cyclone existence influenced by the presence of ENSO and MJO during their occurrence. The results of this study indicate that tropical cyclones in the NH region of Indonesia are more likely to occur during ENSO periods (El Niño and La Niña) when MJO is concurrently active, compared to periods when ENSO occurs without active MJO. In contrast, in the SH region of Indonesia, tropical cyclones are more dominant when La Niña phenomena coincide with each MJO period compared to periods when El Niño coincides with each MJO period.
PENGARUH INDIAN OCEAN DIPOLE (IOD) TERHADAP SEBARAN POLA ANGIN DI BANDARA DEPATI AMIR PANGKALPINANG Bais Ridwan, Muhamad
Jurnal Widya Climago Vol 6 No 2 (2024): Developing Human Resource Competencies in Climate Analysis and Learning Innovatio
Publisher : Pusdiklat BMKG

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Abstract

The results of the NTSC investigation say that some of the factors that influence aviation accidents are human, technical, environmental, and facility factors. Surface wind conditions on the runway are one of the critical meteorological aspects for flight safety. This study aims to understand the surface wind distribution pattern during the Indian Ocean Dipole (IOD) phase and reduce the potential for aircraft accidents at Depati Amir Airport - Pangkalpinang. IOD itself is a weather phenomenon in the Indian Ocean that affects weather conditions in the surrounding area. The results of research conducted using the windrose method with surface wind data from 2011 to 2020 show that each phase of the IOD has a different impact on the distribution of wind patterns at Depati Amir Airport. Positive IOD tends to cause an increase in the percentage of wind speed up to 13.7% of the mean even though the dominant wind direction tends to be the same as the mean. Neutral IOD tends to cause a decrease in the percentage of wind speed from the mean even though the dominant wind direction tends to have a similar pattern to the mean. Meanwhile, Negative IOD causes a shift in the dominant wind direction at Depati Amir Airport by 45o - 90o counterclockwise from the mean. In addition, the Negative IOD also caused a decrease in the percentage of wind speed in all wind speed categories up to 32.7%.

Page 7 of 7 | Total Record : 63

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