Proceedings of the 1st International Conference on Statistics and Analytics, ICSA 2019, 2-3 August 2019, Bogor, Indonesia

Research Article

Spectral Analysis of Rainfall Anomaly in Tanjung Priok

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  • @INPROCEEDINGS{10.4108/eai.2-8-2019.2290527,
        author={Tyas T  Pujiastuti and Nurjaman  Nurjaman and Sugeng  Indarto},
        title={Spectral Analysis of Rainfall Anomaly  in Tanjung Priok},
        proceedings={Proceedings of the 1st International Conference on Statistics and Analytics, ICSA 2019, 2-3 August 2019, Bogor, Indonesia},
        publisher={EAI},
        proceedings_a={ICSA},
        year={2020},
        month={1},
        keywords={rainfall spectral analysis tanjung priok},
        doi={10.4108/eai.2-8-2019.2290527}
    }
    
  • Tyas T Pujiastuti
    Nurjaman Nurjaman
    Sugeng Indarto
    Year: 2020
    Spectral Analysis of Rainfall Anomaly in Tanjung Priok
    ICSA
    EAI
    DOI: 10.4108/eai.2-8-2019.2290527
Tyas T Pujiastuti1,*, Nurjaman Nurjaman1, Sugeng Indarto1
  • 1: Indonesia agenccy for meteorology, climatology and geophysics, Jl. Angkasa I No.2 Kemayoran, Jakarta, 10720, Indonesia
*Contact email: tyas.pujiastuti@bmkg.go.id

Abstract

Rainfall is the most important weather element that played critical role in human life. Located in tropical region, Indonesia has great variability of rainfall that influenced by various factors including global, regional, and local scale phenomena. To achieve better rainfall prediction accuracy, we have to understand factors that contribute to rainfall formation process. In this study, we conducted spectral analysis of rainfall in Tanjung Priok. As the busiest port in the country, there was a demand of high precision weather forecast in Tanjung Priok region. Spectral analysis was used to recognize rainfall pattern in the location. The result showed that rainfall in Tanjung Priok followed the annual cycle, while rainfall anomalies observed six periods of 19 dasarians, 31 dasarians, 3 dasarians, 42 dasarians, 114 dasarians, and 228 dasarians. These periods were indicated as the period of ITCZ, Madden-Jullian Oscillation, dipole mode, and El Nino / La Nina.