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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Berkala Perikanan Terubuk Farmers: Journal of Community Services
Ivonne M Radjawane
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Environmental Science Library & Information Science Social Sciences Other

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WATER MASSES CHARACTERISTICS AT THE SANGHIE TALAUD ENTRY PASSAGE OF INDONESIAN THROUGHFLOW USING INDEX SATAL DATA 2010 Ivonne M Radjawane; Paundra P Hadipoetranto
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 6 No. 2 (2014): Electronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1023.562 KB) | DOI: 10.29244/jitkt.v6i2.9027

Abstract

ABSTRACT Measurement of ocean physical parameters using the CTD was conducted by deep water expedition INDEX-SATAL 2010 (Indonesian Expedition Sangihe-Talaud) in July-August 2010. The aim of this study was to determine the characteristics of water masses around the Sangihe Talaud Water where there was an entry passage of Indonesian throughflow (ITF) at the west pathway that passed through the primary pathway i.e., the Sulawesi Sea and Makassar Strait and the secondary pathway (east pathway) that passed through the Halmahera Sea. The analyses were performed by the method of the core layer and was  processed with software Ocean Data View (ODV). The results showed that in the Sangihe Talaud waters there was a meeting water masses from the North Pacific and the South Pacific. The water mass characteristics in main pathway through the Sulawesi Sea was dominated by surface and intermediate North Pacific water masses and carried by the Mindanao Currents. While the Halmahera Sea water mass was dominated by surface and intermediate South Pacific water masses carried by the New Guinea Coastal Current that moved along the Papua New Guinea and Papua coast enters to the Halmahera Sea. Keywords: Index-Satal 2010, Northern Pacific Water Masses, Southern Pacific Water Masses, Sangihe Talaud
UNDERSTANDING THE MECHANISM OF SEASONAL UPWELLING AND DOWNWELLING AT THE SOUTHERN COAST OF MAKASSAR STRAIT Muhammad Arief Wibowo; Ivonne M Radjawane; Ibnu Sofian
Berkala Perikanan Terubuk Vol 48, No 1 (2020): Februari 2020
Publisher : Fakultas Perikanan dan Kelautan, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1655.857 KB) | DOI: 10.31258/terubuk.48.1.361-371

Abstract

The mechanism of temporary upwelling and downwelling in the southern coast off Makassar Strait, Indonesia is determined not only by the wind-driven coastal during southeast monsoon (SEM) and northwest monsoon (NWM) but also by meeting of two current systems based on previous research. During SEM, water mass of the Flores Sea in eastern area meets the throughflow water coming from northern of Makassar Strait and flow together to Java Sea and this causes upwelling occur. But during NWM, water mass of the Java Sea western   area meets the through flow water and flow together to southern cost of Celebes Island and causes downwelling occur.  The first mechanism is well proven but the second one need more investigation.Twenty years of data result obtained from numerical simulation over the Makassar Strait and adjacent waters are used to describe the seasonal characteristic and mechanism of upwelling in this region. The 3D baroclinic ROMS (Regional Ocean Model System) from Rutgers version was simulated from 1995 to 2014.The climatological results show the existing of upwelling and downwelling clearly identified by the decreasing or increasing of sea surface temperature ± 2ºC and also increasing or decreasing of surface salinity ±0.5 Psu compared by surrounding waters. The evidence of upwelling starts on June, maximum intensity in August and disappears on September following the easterly wind during southeast monsoon. But downwelling start on   December, maximum intensity in January and disappears on February. The mixed layer depth becomes shallow and there is an uplift water from the thermocline to the surface at the upwelling occur, but when downwelling occur the mixed layer depth becomes deeper. The instability of water column was detected from the Brunt-Väisälä frequency (N2) and Richarson number (Ri). By calculating the vorticity and investigate the current circulation we detect the eddy formation in southern part of the Celebes Island at Java Sea and Flores Sea and suggested due to the meeting of current system. We found the Ekman transport is moving to the southern direction offshore of Celebes Island and produces the upwelling during SEM. But when NWM occur, Ekman transport is moving to the northern direction from offshore to the Celebes Island and produce downwelling.
Rumah Garam Daur Ulang Atasi Impor Garam dan Solusi Banjir Rob di Pantura, Jawa Barat nurdjaman, Susanna -; Radjawane, Ivonne M; Taofiqurohman, Ankiq -; Khoirunnisa, Qonitah; Hudzaifah, Hudzaifah; Wulandari, Suci; Septian, Adhi; Umaro, Dimaz Akbar
Farmers : Journal of Community Services Vol 7, No 1 (2026): Farmers: Journal of Community Services
Publisher : Unpad Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/fjcs.v7i1.67550

Abstract

Wilayah Pantai Utara (Pantura) Jawa Barat masih menghadapi dua permasalahan utama, yaitu ketergantungan pada impor garam akibat produksi lokal yang terbatas serta ancaman banjir rob yang merusak infrastruktur dan mengganggu mata pencaharian. Untuk menjawab hal tersebut, kegiatan pengabdian masyarakat ini memperkenalkan Recycle Salt House, fasilitas produksi garam yang dibangun dari botol plastik bekas sebagai solusi berbiaya rendah dan ramah lingkungan. Desain bertingkat memungkinkan rumah garam tetap berfungsi saat banjir rob sekaligus mendukung pengelolaan limbah plastik. Melalui kegiatan sosialisasi, persiapan, pelatihan, dan pendampingan, program ini berhasil membangun rumah garam di Desa Bungko Lor, Kabupaten Cirebon, yang telah menghasilkan garam pada uji coba awal. Keterlibatan KUD Mina Jaka Bhakti dan pemuda pesisir menunjukkan potensi program ini dalam meningkatkan produksi garam lokal, memberdayakan masyarakat, serta mendukung keberlanjutan lingkungan di wilayah pesisir.
Co-Authors Ankiq Taofiqurohman S Hudzaifah Hudzaifah Ibnu Sofian Khoirunnisa, Qonitah Muhammad Arief Wibowo nurdjaman, Susanna - Paundra P Hadipoetranto Septian, Adhi Suci Wulandari Umaro, Dimaz Akbar