STUDY OF EKMAN MASS TRANSPORT AND EKMAN PUMPING VELOCITY IN THE SOUTHERN WATERS OF JAVA – NUSA TENGGARA FROM 2003 TO 2024
DOI:
10.29303/ipr.v9i2.565Downloads
Abstract
The waters south of Java to Nusa Tenggara are a critical upwelling region heavily influenced by monsoon dynamics. The interactions drive oceanographic variability, specifically Ekman Mass Transport (EMT) and Ekman Pumping Velocity (EPV), which regulate primary productivity. While previous studies have examined these dynamics, most have focused on short-term variations. To address this, this study analyzes the variability of EMT and EPV over a 22-year period (2003–2024) and their interaction with El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD). EMT and EPV values were calculated using ECMWF wind data, SST, and chlorophyll-a data sourced from MODIS, and climate indices (Niño 3.4 and DMI), which were then analyzed using Pearson correlation. Results show that EMT and EPV peak during the Southeast Monsoon (JJA), reaching approximately 5.16 m²/s and -2.89 × 10⁻⁵ m/s, respectively. Notable anomalies occurred in 2010 and 2016; specifically, the 2010 interaction between La Niña and a negative IOD significantly suppressed upwelling. Correlation analysis reveals that SST is predominantly influenced by EPV, while chlorophyll a concentration is more closely linked to EMT. Although both ENSO and IOD modulate these dynamics, the IOD exerts a stronger influence due to the region’s proximity to the Indian Ocean. These findings provide critical insights into the oceanographic drivers of regional productivity, supporting sustainable fisheries management.
Keywords:
EMT EPV SST Chlo ENSO IODReferences
[1] E. Aldrian, Meteorologi Laut Indonesia, no. June 2008. 2008.
[2] A. Wirasatriya et al., “Ekman dynamics variability along the southern coast of Java revealed by satellite data,” International Journal of Remote Sensing, vol. 41, no. 21, pp. 8475–8496, 2020.
[3] D. Wang, H. Wang, M. Li, G. Liu, and X. Wu, “Role of Ekman transport versus Ekman pumping in driving summer upwelling in the South China Sea,” Journal of Ocean University of China, vol. 12, no. 3, pp. 355–365, 2013.
[4] E. M. J. Putri and J. Wirasatriya, Anindya, Marwoto, “Pengaruh Ekman Mass Transport dan Ekman Pumping Velocity Terhadap Upwelling di Perairan Selatan Pulau Bali-Sumbawa,” vol. 05, no. 03, pp. 118–130, 2023.
[5] H. I. Ratnawati, R. Hidayat, A. Bey, and T. June, “Upwelling di Laut Banda dan Pesisir Selatan Jawa serta Hubungannya dengan ENSO dan IOD,” Omni-Akuatika, vol. 12, no. 3, pp. 119–130, 2016.
[6] D. Suman, A., Wudianto, Sumiono, B., Badrudin, Nugroho, D., Merta G. S., Suwarso, Taufik, M., Amri, K., Kembaren, Potensi dan Tingkat Pemanfaatan Sumber Daya Ikan di Wilayah Pengelolaan Perikanan Republik Indonesia (WPP RI). Jakarta: Ref Graphika, 2014.
[7] H. A. Rachman et al., “Dynamic of upwelling variability in southern Indonesia region revealed from satellite data: Role of ENSO and IOD,” Journal of Sea Research, vol. 202, no. August, p. 102543, 2024.
[8] R. B. Yoga, H. Setyono, and G. Harsono, “Dinamika Upwelling Dan Downwelling Berdasarkan Variabilitas Suhu Permukaan Laut Dan Klorofil-a,” Oseanografi, vol. 3, no. 1, pp. 57–66, 2014.
[9] I. N. A. Diputra, “Variability of SST, CHL-A, and Wind in the South Java – Nusa Tenggara Waters From 2003 – 2023 and Its Relation to ENSO and IOD Phenomena.,” Udayana University, 2024.
[10] A. Kurnianingsih, T. N., Sasmito, B., Prasetyo, Y., & Wirasatriya, “Analisis sebaran suhu permukaan laut, klorofil-a, dan angin terhadap fenomena upwelling di perairan Pulau Buru dan Seram.,” Jurnal Geodesi Undip, vol. 6(1), pp. 238–248, 2017.
[11] U. O. Nurafifah, M. Zainuri, and A. Wirasatriya, “Pengaruh ENSO dan IOD Terhadap Distribusi Suhu Permukaan Laut dan Klorofil-a Pada Periode Upwelling di Laut Banda,” Indonesian Journal of Oceanography, vol. 4, no. 3, pp. 74–85, 2022.
[12] Q. Taufikurahman and R. ; Hidayat, “Coastal Upwelling in Southern Coast of Sumbawa Island, Indonesia,” in Journal of Physics: Conference Series, 2016.
[13] S. Ginanjar, M. F. Syach, and S. Wulandari, “Kajian pengaruh siklon tropis mangga terhadap curah hujan, transpor Ekman, viskositas Eddy dan tinggi gelombang di perairan selatan Jawa pada 20-25 Mei 2020,” Jurnal Meteorologi Klimatologi dan Geofisika, vol. 7, no. 2, pp. 15–23, 2020.
[14] F. Simanjuntak and T. H. Lin, “Monsoon Effects on Chlorophyll-a, Sea Surface Temperature, and Ekman Dynamics Variability along the Southern Coast of Lesser Sunda Islands and Its Relation to ENSO and IOD Based on Satellite Observations,” Remote Sensing, vol. 14, no. 7, 2022.
[15] Martono, “Seasonal and Interannual Variations of Sea Surface Temperature in the Indonesian Waters,” vol. 30(2), pp. 120–129, 2016.
[16] A. Corredor-Acosta et al., “Spatio-temporal variability of chlorophyll-a and environmental variables in the Panama bight,” Remote Sensing, vol. 12, no. 13, 2020.
[17] ESRI, “Aggregate (spatial analyst) - ArcMap.” Accessed: Jun. 15, 2025. [Online]. Available: https://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analysttoolbox/aggregate.htm
[18] C. Candra and A. Sakban, “Analisis korelasi kepemimpinan kepala sekolah dan kinerja guru terhadap motivasi belajar siswa di SMAN 1 Labuapi Kabupaten Lombok Barat,” Jurnal Ilmiah Manda Education, vol. 2(2), pp. 53–60, 2016.
[19] D. S. Graha, Kunarso, and M. Zainuri, “Variabilitas Antar Tahunan Suhu Permukaan Laut dan Klorofil-A Terhadap Hasil Tangkapan Ikan Kembung (Rastreligger Sp.) di Perairan Demak,” Indonesian Journal of Oceanography, vol. 6, no. 2, pp. 148–158, 2024.
[20] J. E. V Siahaan, K. Kunarso, and Y. J. Wijaya, “Variasi Temporal Dinamika Upwelling di Selat Makassar Periode 2007-2021,” Buletin Oseanografi Marina, vol. 13, no. 1, pp. 122–135, 2024.
[21] A. S. Budiman, D. G. Bengen, I. W. Nurjaya, Z. Arifin, and M. F. A. Ismail, “A Comparison of the Three Upwelling Indices in the South Java Sea Shelf,” Chiang Mai University Journal of Natural Sciences, vol. 21, no. 3, 2022.
[22] W. J. Moses et al., “Estimation of chlorophyll- a concentration in turbid productive waters using airborne hyperspectral data,” Water Research, vol. 46, pp. 993–1004, 2011.
[23] J. D. Everett, M. E. Baird, M. Roughan, I. M. Suthers, and M. A. Doblin, “Progress in oceanography relative impact of seasonal and oceanographic drivers on surface chlorophyll-a along a western boundary current,” Progress in Oceanography, vol. 120, pp. 340–351, 2014.
[24] H. Bernades et al., “The effect of Ekman mass transport and Ekman pumping velocity on the variability of sea surface temperature in the Arafura Sea,” in IOP Conference Series: Earth and Environmental Science, 2021.
[25] D. Oktaviani, G. Handoyo, M. Helmi, Kunarso, and A. Wirasatriya, “Karakteristik Upwelling pada Periode Indian Ocean Dipole (IOD) Positif di Perairan Selatan Jawa Barat,” Indonesian Journal of Oceanography, vol. 3, no. 4, pp. 354–361, 2021.
[26] W. S. T. Pranowo et al., Sumber Daya NonHayati Maritim, Seri Buku. Jakarta: Amafrad Press, 2019.
[27] J. Sprintall et al., “The Indonesian seas and their role in the coupled ocean–climate system,” Nature Geoscience, vol. 7, pp. 487–492, 2014.
[28] J. Lumban-Gaol et al., “Impact of the strong downwelling (Upwelling) on small pelagic fish production during the 2016 (2019) negative (positive) indian ocean dipole events in the eastern indian ocean off java,” Climate, vol. 9, no. 2, pp. 1–11, 2021.
[29] A. Syafik, Kunarso, and Hariadi, “Permukaan laut di Samudera Hindia (Wilayah Pengelolaan Perikanan Republik Indonesia 573),” Jurnal Oseanografi, vol. 2, no. 3, pp. 318–328, 2013.
[30] R. D. Susanto, Thomas. S. Moore, and J. Marra, “Ocean color variability in the Indonesian Seas during the SeaWiFS era,” Geochemistry, Geophysics, Geosystems, vol. 7, no. 5, pp. 1–16, 2006.
[31] E. Mustikasari, L. C. Dewi, A. Heriati, and W. S. Pranowo, “Pemodelan pola arus barotropik musiman 3 dimensi (3D) untuk mensimulasikan fenomena upwelling di perairan Indonesia.,” Jurnal Segara, vol. 11, no. 1, pp. 25–35, 2015.
[32] M. A. Wahid, “Kajian fenomena upwelling di perairan Sumatera bagian selatan serta mengidentifikasi pengaruhnya terhadap wilayah Aceh,” Universitas Islam Negeri Ar-Raniry, 2023.
[33] D. Okgareta, I. Wayan Nurjaya, Y. Naulita, and Rastina, “Oceanographic characteristics of Lampung Bay and its relationship to the Indian Ocean Dipole (IOD) period 2013-2021,” BIO Web of Conferences, vol. 106, pp. 0–10, 2024.
[34] N. Kurniawati, D. O. Lestari, Fauziyah, D. Setiabudidaya, and I. Iskandar, “Variation of thermodynamic layers over the South Coastal Java Region (SJCR) and their influences on nutrient abundance,” Journal of Physics: Conference Series, vol. 1568, no. 1, 2020.
[35] Z. Ruan, B. Li, C. Yu, R. Ding, P. Bai, and Q. Wu, “The impact of tropical cyclone outer size on ocean surface responses,” Frontiers in Marine Science, vol. 11, no. July, pp. 1–11, 2024.
[36] X. Fang, X. Zhang, X. Chen, and W. Yu, “The Impact of Ekman Pumping and Transport on Dosidicus gigas (Jumbo Flying Squid) Fishing Ground by Chinese Jiggers off the Coast of Peru,” Journal of Marine Science and Engineering, vol. 13, no. 2, 2025.
[37] R. J. Janse et al., “Conducting correlation analysis: Important limitations and pitfalls,” Clinical Kidney Journal, vol. 14, no. 11, pp. 2332–2337, 2021.
[38] A. S. Atmadipoera, A. S. Jasmine, M. Purba, and A. R. T. D. Kuswardani, “Upwelling Characteristics in the Southern Java Waters During Strong La Nina 2010 and Super El Nino 2015,” Jurnal Ilmu dan Teknologi Kelautan Tropis, vol. 12, no. 1, pp. 257–276, 2020.
[39] G. Chen, W. Han, Y. Li, D. Wang, and T. Shinoda, “Intraseasonal variability of upwelling in the equatorial Eastern Indian Ocean,” Journal of Geophysical Research: Oceans, vol. 120, pp. 7598–7615, 2015.
[40] U. Setiawan, R. Y., A. Wirasatriya, S. L. Hernawan, and I. Iskandar, “Spatio-temporal Variability of Surface Chlorophyll-a in the Halmahera Sea and Its Relation to ENSO and the Indian Ocean Dipole,” International Journal of Remote Sensing, vol. 41, no. 1, pp. 284–299, 2020.
[41] A. Setiawan, R. Y., E. Setyobudi, A. Wirasatriya, A. S. Muttaqin, and L. Maslukah, “The Influence of Seasonal and Interannual Variability on Surface Chlorophyll-a off the Western Lesser Sunda Islands,” IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 12, no. 1, pp. 4191–4197, 2019.
[42] M. F. K. Almunawir, A. Wirasatriya, and R. Widiaratih, “Pengaruh Fenomena IOD Positif Kuat 2019 Terhadap Karakteristik Upwelling di Perairan Nusa Tengggara,” Indonesian Journal of Oceanography, vol. 6, no. 1, pp. 72–83, 2024.
[43] N. P. Purba, W. S. Pranowo, A. B. Ndah, and P. Nanlohy, “Seasonal variability of temperature, salinity, and surface currents at 0° latitude section of Indonesia seas,” Regional Studies in Marine Science, vol. 44, no. 101772, 2021.
[44] D. H. Kunarso, Ismunarti, A. Rifai, B. Munandar, A. Wirasatriya, and R. D. Susanto, “Effect of Extreme ENSO and IOD on the Variability of Chlorophyll-a and Sea Surface Temperature in the North and South of Central Java Province,” ILMU KELAUTAN: Indonesian Journal of Marine Sciences, vol. 28, no. 1, pp. 1–11, 2023.
[45] M. A. Rahman, M. L. Syamsudin, M. U. K. Agung, and Sunarto, “Pengaruh Musim Terhadap Kondisi Oseanografi dalam Penentuan Daerah Penangkapan Ikan Cakalang (Katsuwonus pelamis) di Perairan Selatan Jawa Barat,” J. Perikan. dan Kelaut., vol. X, no. 1, pp. 92–102, 2019.
[46] A. Persson, “The Story of the Hovmöller Diagram: an (Almost) Eyewitness Account,” Bull. Am. Meteorol. Soc., vol. 98, no. 5, pp. 949–957, 2017.
[47] A. Hartoko, "Oseanografi dan Sumber Daya Perikanan Kelautan di Indonesia," UNDIP Press, 2010.
[48] R.Y. Setiawan, E. Setyobudi, A. Wirasatriya, A.S. Muttaqis, and L. Maslukah, "Seasonal and Interannual Coastal Wind Variability of the Central Maluku Islands Revealed by Satellite Oceanography," Global Nest Journal, vol. 24, no. 1, 37-43, 2022.
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