Analisis Data Pola Musim di Indonesia Menggunakan Data Equivalent Water Height (EWH) dari Satelit GRACE
DOI:
https://doi.org/10.55123/insologi.v4i6.7085Keywords:
CPC, Equivalent Water Height, Seasonal PatternAbstract
Indonesia, as a tropical country, exhibits rainfall patterns that are strongly influenced by both global and regional atmospheric dynamics. The seasonal climate system in Indonesia, which consists of the wet season, dry season, and transitional periods, plays a crucial role in water resource management, agricultural activities, and disaster mitigation. To better understand these complex atmospheric and hydrological interactions, climatological parameters such as Equivalent Water Height (EWH) serve as important indicators of terrestrial water storage variability. The application of GRACE and GRACE-FO satellite missions provides a novel approach to monitoring hydrological dynamics through EWH, enabling large-scale and continuous observations of terrestrial water storage changes. The results of this study reveal a strong negative relationship between the Oceanic Niño Index (ONI) and EWH at zero time lag, indicating that El Niño events tend to reduce terrestrial water storage across Indonesia. This simultaneous response suggests that changes in atmospheric circulation during El Niño phases immediately affect hydrological conditions over land. In particular, the reduction in water storage is primarily associated with weakened moisture transport from both the Indian Ocean and the Pacific Ocean, which are the main sources of atmospheric water vapor influencing Indonesia’s climate system. As a result, decreased moisture convergence leads to reduced precipitation and a rapid decline in terrestrial water reserves. Bias evaluation further indicates distinct spatial patterns across the Indonesian region. Negative bias predominantly occurs in Sumatra and Kalimantan, whereas positive bias is more commonly observed in Nusa Tenggara and Maluku. In addition, the RMSE analysis shows that EWH estimates are relatively more accurate in regions with homogeneous rainfall patterns, while their performance decreases in areas characterized by high rainfall variability. These findings highlight the importance of considering regional climatic characteristics when interpreting satellite-based hydrological observations and emphasize the role of large-scale atmospheric–oceanic interactions in shaping terrestrial water storage dynamics in Indonesia.
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References
Abdelmohsen, K., Sultan, M., Save, H., Abotalib, A. Z., & Yan, E. (2020). What can the GRACE seasonal cycle tell us about lake-aquifer interactions?. Earth-Science Reviews, 211, 103392.
Anjasmara, IM, & Kuhn, M. (2010). Menganalisis variasi tinggi air ekuivalen tenggang selama lima tahun menggunakan analisis komponen utama. Dalam Gravity, Geoid and Earth Observation: IAG Commission 2: Gravity Field, Chania, Crete, Greece, 23-27 Juni 2008 (hlm. 547-555). Springer Berlin Heidelberg.
Chen, L., Han, B., Wang, X., Zhao, J., Yang, W., & Yang, Z. (2023). Machine learning methods in weather and climate applications: A survey. Applied Sciences, 13(21), 12019.
Dickey, J.O., C.R. Bentley, R. Bilham, J.A. Carton, R.J. Eanes, T.A. Herring, W.M. Kaula,G.S.E. Lagerloef, S. Rojstaczer, W.H.F. Smith, H.M. van den Dool, J.M. Wahr, and M.T. Zuber. (1999). Satellite Gravity and the Geosphere. Washington, D.C: National Academy Press.
Elsaka, B. (2021). Evaluation of Terrestrial Total Water Height Variations over the Nile River Basin Based on Two Full-Years of GRACE-FO Gravity Field Monthly Solutions. Int. Res. J. Adv. Eng. Sci, 6, 90-95.
Frappart, F., & Ramillien, G. (2018). Monitoring groundwater storage changes using the Gravity Recovery and Climate Experiment (GRACE) satellite mission: A review. Remote Sensing, 10(6), 829.
Gore, R. D., & Gawali, B. W. (2023, August). Analysis of weather parameters using machine learning. In First International Conference on Advances in Computer Vision and Artificial Intelligence Technologies (ACVAIT 2022) (pp. 569-589). Atlantis Press.
Humphrey, V., Rodell, M., & Eicker, A. (2023). Using satellite-based terrestrial water storage data: a review. Surveys in Geophysics, 44(5), 1489-1517.
Jia, Y., Lei, H., Yang, H., & Hu, Q. (2020). Terrestrial water storage change retrieved by GRACE and its implication in the Tibetan Plateau Estimating areal precipitation in Ungauged Region. Remote Sensing, 12(19), 3129.
Jiang, Z., Hsu, Y. J., Yuan, L., Cheng, S., Li, Q., & Li, M. (2021). Estimation of daily hydrological mass changes using continuous GNSS measurements in mainland China. Journal of Hydrology, 598, 126349.
Jiang, Z., Hsu, Y. J., Yuan, L., & Huang, D. (2021). Monitoring time-varying terrestrial water storage changes using daily GNSS measurements in Yunnan, southwest China. Remote Sensing of Environment, 254, 112249.
Krasnoshchekov, K., Dergunov, A., & Ponomarev, E. (2020). Remote sensing data for assessing the equivalent water height (EWH) variety versus the level of forest disturbance in Central Siberia. In E3S Web of Conferences (Vol. 223, p. 03007). EDP Sciences.
Nogueira, M. (2020). Inter-comparison of ERA-5, ERA-interim and GPCP rainfall over the last 40 years: Process-based analysis of systematic and random differences. Journal of Hydrology, 583, 124632.
Rahayu, S. Y., & Anjasmara, I. M. (2024). Variability of Equivalent Water Height (EWH) in Indonesia during 14 years of grace gravity satellite mission. Geodesy and Cartography, 50(1), 60-66.
Rahayu, S. Y., & Anjasmara, I. M. (2021, June). Effects of Extreme Climate Change in 2016 and Its Correlation with EWH Variability in Indonesia. In IOP Conference Series: Earth and Environmental Science (Vol. 799, No. 1, p. 012035). IOP Publishing.
Rodell, M., & Reager, J. T. (2023). Water cycle science enabled by the GRACE and GRACE-FO satellite missions. Nature Water, 1(1), 47-59.
Singh, A., Reager, J. T., & Behrangi, A. (2021). Estimation of hydrological drought recovery based on precipitation and Gravity Recovery and Climate Experiment (GRACE) water storage deficit. Hydrology and Earth System Sciences, 25(2), 511-526.
Tapley, B. D., Watkins, M. M., Flechtner, F., Reigber, C., Bettadpur, S., Rodell, M., & Velicogna, I. (2019). Contributions of GRACE to understanding climate change. Nature climate change, 9(5), 358-369.
Tapley, Byron D., et al.(2004).The gravity recovery and climate experiment: Mission overview and early results." Geophysical research letters 31.9.
Winarno, G. D., Harianto, S. P., & Santoso, R. (2019). Klimatologi Pertanian. Pusaka Media.
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