Characteristics and Variability of the Flores Itf and Its Coherence With the South Java Coastal Current

Atmadipoera, Agus S.; Hasanah, Paradita

doi:10.29244/jitkt.v9i2.19289

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…The current that comes to the Lombok Strait from the east and north looks stronger than the current from the west. At this depth, an eddy is formed which is in accordance with the research of Atmadipoera and Hasanah[13], who found an anti-cyclonic eddy in the Southern Hemisphere with a vortex diameter of up to 100 kilometres. The magnitude of the eddy is thought to have influenced the strength of Arlindo in the northern part of the island.…”

supporting

confidence: 90%

Characteristics of North Pacific water masses in the Bali Sea

Khalishah,

Naulita,

Hernawan

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The Bali Sea is the trajectory of Indonesian Throughflow (ITF)’s water mass which originates from the North Pacific (NP) Ocean before exiting through Lombok Strait. Therefore, the NP water masses have an impact on the characteristics of the water mass in this area. The study aims to describe the stratification and structure of water masses and calculate the contribution of North Pacific Subtropical Water (NPSW) and North Pacific Intermediate Water (NPIW) using Optimum Multiparameter (OMP) analysis. Stratification of the Bali Sea consists of mixed, thermocline, and deep layers. There were found remnants of NPSW and NPIW inside the thermocline layer, deeper than their origin in the NP Ocean. The core layer of NPSW has an S-max value of 34,6 psu at 120-170m depth, while NPIW has an S-min value of 34,3 psu at the deeper layer, 260-280m depth. The NPIW more dominant presence in the Bali Sea with 80% contribution at a depth of 200-215 meters, while NPSW contribution is 70% at a depth of 110-130 meters. NPSW’s contribution decreases from east to west and vice versa the NPIW.

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supporting

confidence: 90%

Characteristics of North Pacific water masses in the Bali Sea

Khalishah,

Naulita,

Hernawan

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The wavelet output is in the form of wavelet coefficients of scale and position. The purpose of analyzing time series with continuous wavelet transform (CWT) is to determine the dominant periodicity of variability and its variability in time [9]. CWT calculations using the equation [10].…”

Section: Continuous Wavelet Transform (Cwt)mentioning

confidence: 99%

Assessment of Oceanographic Trend and Ocean Health Index in The Gulf of Madura

Raihan,

Atmadipoera,

Naulita

et al. 2024

E3S Web Conf.

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The Gulf of Madura is heavily utilized for shipping, fishing, and oil exploration. These activities impact the marine environment. This study aims to describe the spatial and temporal variability in oceanographic parameters, vertical current structures, trends, and ocean health conditions based on oceanographic parameters estimated from the OHI value. The data used in this research consists of INDESO and Marine Copernicus data. The results of the study show that monsoon phenomena greatly influence temperature and salinity in the Gulf of Madura, with temperature increasing and salinity decreasing during the northwest monsoon, and vice versa during the southeast monsoon. An analysis of oceanographic variables over the past 12 years showed an increase in salinity and nitrate variables, and a decrease in other variables. The trend fluctuation is still within the quality standard for seawater according to government regulation number 22 of 2021. The results of the calculation of the ocean health index show that the Gulf of Madura is in a fair condition with a value of 0.63. This finding can be used to manage and utilize marine space sustainably without deteriorating the ocean’s health.

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“…Tujuan dari penelitian ini yaitu untuk menganalisis karakteristik arus laut dan pola pergerakannya di Selat Mansuar, Kabupaten Raja Ampat pada Musim Peralihan I tahun 2013. Pada saat Musim Peralihan I khususnya bulan April, kondisi perairan yang dipengaruhi oleh kecepatan ARLINDO yang semakin kuat (Atmadipoera dan Hasanah, 2017). Manfaat dari penelitian ini adalah hasil penelitian berupa karakteristik arus dan pola pergerakan arus pada puncak Musim peralihan I Tahun 2013.…”

Section: Pendahuluanunclassified

Studi Karakteristik Arus Laut di Selat Mansuar, Kabupaten Raja Ampat Berdasarkan Pemodelan Hidrodinamika 2D

Nusratina,

Ismunarti,

Ismanto

2023

Indonesian Journal of Oceanography

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Kabupaten Raja Ampat terkenal dengan pemandangan alamnya yang indah disertai pasir pantainya yang berwarna putih. Raja Ampat terletak pada kawasan Coral Triangle atau pusat segitiga karang dunia. Kabupaten Raja Ampat terdapat beberapa selat dan teluk salah satunya yaitu Selat Mansuar yang berada diantara Pulau Gam dan Pulau Mansuar. Kondisi morfologi dasar laut yang terjal dan tertutup terumbu karang, topografi perairan yang tidak teratur, posisi perairan yang berada di pintu masuk bagian timur laut ARLINDO, serta adanya pengaruh arus Halmahera Eddie memberikan pengaruh yang pada kecepatan dan arah arus di Selat Mansuar. Kondisi tersebut dipengaruhi pula oleh batimetri perairan yang cukup kompleks sehingga sangat menarik untuk dilakukan pengkajian. Penelitian ini bertujuan untuk mengetahui karakteristik arus laut di Selat Mansuar, Kabupaten Raja Ampat. Pendekatan numerik dilakukan melalui pemodelan hidrodinamika dua dimensi. Hasil pendekatan hidrodinamika akan menghasilkan kecepatan dan arah arus, serta nilai pasang surut. Data yang digunakan pada penelitian ini yaitu data angin ERA-5, batimetri nasional (BATNAS), serta data arus dan pasang surut pengukuran lapangan bersumber dari Pusat Penelitian dan Pengembangan Geologi Kelautan (P3GL). Hasil pemodelan berupa kecepatan dan arah arus untuk kemudian di validasi dengan data pengukuran lapangan. Hasil penelitian menunjukkan bahwa karakteristik arus di Selat Mansuar lebih dominan dipengaruhi oleh arus pasut. Pola arus yang dihasilkan pada puncak siklus angin Musim peralihan I bergerak dominan ke arah Tenggara. Pada kondisi surut menuju pasang arus memiliki kecepatan lebih tinggi dibandingkan dengan kondisi lainnya, dengan nilai kecepatan rata-rata mencapai 0.235 m/s. Berdasarkan hasil analisis komponen pasang surut, Selat mansuar termasuk tipe pasang surut Campuran Condong Harian Ganda.AbstractRaja Ampat Regency is famous for its beautiful natural scenery and white sand beaches. Raja Ampat is located in the Coral Triangle area or the center of the world's coral triangle. Raja Ampat Regency has several straits and bays, one of which is the Mansuar Strait between Gam Island and Mansuar Island. The morphological conditions of the seabed are steep and covered with coral reefs, irregular water topography, the position of the waters at the entrance to the northeast part of ARLINDO, and the influence of the Halmahera Eddie current which affects the speed and direction of the current in the Mansuar Strait. These conditions are also influenced by the bathymetry of the waters which are quite complex so it is very interesting to do an assessment. This study aims to determine the characteristics of ocean currents in the Mansuar Strait, Raja Ampat Regency. The numerical approach is done through two-dimensional hydrodynamic modeling. The results of the hydrodynamic approach will produce current speed and direction, as well as tidal values. The data used in this study are ERA-5 wind data, national bathymetry (BATNAS), and field measurement data of currents and tides sourced from the Marine Geology Research and Development Center (P3GL). Modeling results in the form of current speed and direction and then validated with field measurement data. The results showed that the characteristics of the currents in the Mansuar Strait are dominantly influenced by tidal currents. The resulting current pattern at the peak of the wind cycle Transitional season I move dominantly to the Southeast. At low tide conditions towards the tide, the current has a higher speed compared to other conditions, with an average speed value reaching 0.235 m/s. Based on the results of the tidal component analysis, the Mansuar Strait includes a Mixed Tide Prevailing Semi Diurnal type.

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Characteristics and Variability of the Flores Itf and Its Coherence With the South Java Coastal Current

Cited by 11 publications

References 16 publications

Characteristics of North Pacific water masses in the Bali Sea

Characteristics of North Pacific water masses in the Bali Sea

Assessment of Oceanographic Trend and Ocean Health Index in The Gulf of Madura

Studi Karakteristik Arus Laut di Selat Mansuar, Kabupaten Raja Ampat Berdasarkan Pemodelan Hidrodinamika 2D

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