Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

7.731

P-Index

This Author published in this journals

All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Journal of Oceanography International Journal of Marine and Aquatic Resource Conservation and Co-existence Jurnal Kelautan Tropis Science and Technology Indonesia Jurnal Kelautan Nasional Molekul: Jurnal Ilmiah Kimia Indonesian Journal of Oceanography

Anindya Wirasatriya

Departemen Oseanografi, Fakultas Perikanan Ilmu Kelautan, Universitas Diponegoro Jl. Prof. H. Sudarto, SH, Tembalang, Kota Semarang, Kode Pos 50275 Telp/fax (024) 7474698

Author-ID : 2957815

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Library & Information Science Materials Science & Nanotechnology Physics Other

Published : 64 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

SST Retrieval Using AVHRR on Board NOAA-19 in the Seas Around Japan Anindya Wirasatriya; Hiroshi Kawamura; Futoki Sakaida
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 14, No 4 (2009): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

The purpose of this study is to derive new Multi-Channel Sea Surface Temperature (MCSST) equations of AVHRR aboard NOAA-19, which was launched in February 2009. Since the HRPT data transmitted from the satellite are directly received at the Tohoku University in Japan, the study area is the seas surrounding it. Using in situ SSTs measured by drifting buoys, 2248 match-ups (1181 for daytime and 1067 for nighttime) are generated for September - November 2009. The daytime and nighttime match-ups are separated into a half for algorithm tuning and another half for validation. Coefficients of MCSSTs are obtained for daytime and nighttime by applying multiple regression analysis to the match-ups, which consist of brightness temperatures of the AVHRR split-window channels and the in-situ SSTs. Validation using the independent match-ups shows that the retrieved daytime and nighttime SSTs have biases of 0.05 and 0.08°C and root mean square differences of 0.61°C and 0.55°C, respectively. Key words : AVHRR, MCSST, NOAA-19, seas around Japan Tujuan dari kajian ini adalah untuk memperoleh formula Multi-Channel Sea Surface Temperature (MCSST) baru dari AVHRR/NOAA-19 yang diluncurkan pada bulan February 2009. Karena HRPT data yang ditransmisikan dari satelit diterima di Universitas Tohoku, Jepang maka area kajiannya adalah perairan di sekitar Jepang. Dengan menggunakan pengukuran SST in-situ yang didapat dari drifting buouys , sebanyak 2248 match-up data (1181 untuk siang hari dan 1067 untuk malam hari) diperoleh dari data bulan September-November 2009. Kemudian match-up data tersebut dipisahkan menjadi 2 bagian, separuh digunakan untuk mendapatkan formula dan separuhnya lagi untuk validasi. Koefisien formula MCSST diperoleh menggunakan analisa multi regresi terhadap match-up data yang terdiri dari brightness temperature dari kanal AVHRR split window dan SST in-situ. Validasi menggunakan match-up data independen menunjukkan untuk siang hari nilai SST memiliki bias 0.05°C dan Root mean square differences (RMSD) sebesar 0.610C sedangkan untuk malam hari sebesar 0.08°C untuk bias dan 0.55°C untuk RMSD. Kata kunci : AVHRR, MCSST, NOAA-19, perairan Jepang

Studi Persistensi Suhu Permukaan Laut Tinggi (>30°C) di Perairan Selat Malaka Metrio Swandiko; Anindya Wirasatriya; Jarot Marwoto; Muslim Muslim; Elis Indrayanti; Petrus Subardjo; Dwi Haryo Ismunarti
Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v10i2.31554

Hot Event merupakan fenomena suhu permukaan laut (SPL) tinggi lebih dari 30°C dan memiliki mekanisme khusus dalam pembentukannya, yaitu kecepatan angin lemah dan radiasi matahari tinggi. Hot Event memiliki peran penting dalam menyumbang bahang pada pacific warm pool di Samudra Pasifik bagian barat dan berperan mengatur variasi iklim global. Indonesia sebagai negara kepulauan memiliki potensi besar melemahkan sirkulasi angin dan potensi kejadian Hot Event. Selat Malaka merupakan selat terpanjang di Indonesia dan berpotensi untuk menjadi area kajian Hot Event. Fenomena SPLtinggi (>30°C) dan konstan selama 13 tahun (2003 – 2015) di Selat Malaka merupakan hal unik untuk dikaji. Penelitian ini bertujuan untuk mengidentifikasi dan mengetahui mekanisme terjadinya SPL tinggi (>30°C) dan konstan selama 13 tahun (2013 - 2015) di Selat Malaka. Metode yang digunakan adalah metode kuantitatif. Data yang digunakan adalah data harian SPL, angin, arus permukaan, radiasi matahari selama 13 tahun serta batimetri. Pengolahan data menggunakan bahasa pemograman untuk memvisualisasi SPL tinggi >30°C, angin lemah <2 m/det, arus, radiasi matahari tinggi 200 W/m² serta data batimetri. Variasi SPL paling tinggi dan konstan terjadi pada musim timur (Agustus) dan paling rendah pada musim barat (Februari). Fenomena SPL tinggi dan konstan di wilayah kajian B terhadap kajian A dan C disebabkan lemahnya kecepatan angin <2 m/det di wilayah B dibandingkan wilayah A dan C, serta didukung dengan tingginya radiasi matahari dan batimetri wilayah kajian B yang relatif dangkal, sehingga proses pemanasan massa air lebih cepat dibandingkan wilayah kajian lainnya. Hot Event is a phenomenon of high sea surface temperature (SST) over 30 °C and it has a unique mechanism in its formation by the lower wind speed and high solar radiation. Hot Event has an important role in contributing heat to the pacific warm pool in the western Pacific Ocean and play a role in regulating global climate variations. Indonesia as an archipelagic country has the potential to weaken wind circulation and potential Hot Event. The Malacca Strait is the longest strait in Indonesia and it is potential for Hot Events. The phenomenon of high SST (>30 °C) and constant for 13 years (2003 - 2015) in the Malacca Strait is unique to be studied. The present research aims to identify and determine the mechanism of the occurrence of high SST (>30 °C) and constant for 13 years (2013 - 2015). The method used in this study is quantitative method. The data used are daily data of SST, wind, surface currents, solar radiation for 13 years, and bathymetry. Programming was used to visualize high SST >30 °C, lower speed winds <2 m/s, currents, high solar radiation 200 W/m² also bathymetry data. The highest and constant variation of SST occurs in the east season (August) and the lowest in the west season (February). The phenomenon of high and stable SST in area B on A and C is due to the low wind speed <2 m/s in region B compared to A and C and it is supported by high solar radiation and shallow bathymetry in area B, so that the heating process of water mass is faster than other areas.

Respon Kecepatan Angin Terhadap Variabilitas Klorofil-a di Laut Filipina Dan Maluku Bagian Utara Bayu Munandar; Anindya Wirasatriya; Denny Nugroho Sugianto; Ambariyanto Ambariyanto; Sunaryo Sunaryo
Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v10i3.38273

Suplay massa air di Laut Filipina dan Maluku bagian utara berasal dari Samudera Pasifik. Variabilitas klorofil-a (chl-a) dapat dipengaruhi oleh suplay massa air dari suatu wilayah atau pengaruh interaksi atmosfer dan laut. Penelitian bertujuan untuk menjelaskan pengaruh interaksi atmosfer-laut terhadap variabilitas chl-a secara spasial dan temporal. Data yang digunakan yaitu data citra satelit dengan periode 2003-2019 dan argo float. Hasil menunjukkan chl-a di Laut Filipina selalu berada dibawah 0,1 mg/m3 di sepanjang tahun dan Laut Maluku bagian utara mengalami peningkatan saat musim timur (0,27 mg/m3). Kenaikan chl-a di Laut Maluku bagian utara diikuti dengan kenaikan kecepatan angin (musim timur) yang menyebabkan Ekman Mass Transport (EMT). EMT bergerak kearah timur laut yang membawa massa air menjauhi pantai dan terjadi proses coastal upwelling. Coastal upwelling inilah menjadi faktor utama peningkatan chl-a di Laut Maluku bagian utara. Sebaliknya, kenaikan kecepatan angin di Laut Filipina tidak membangkitkan EMT dan tidak meningkatkan chl-a. Chl-a yang stabil di sepanjang tahun di Laut Filipina membuktikan kecepatan angin kuat tidak terlalu dominan untuk mempengaruhi variabilitas chl-a. Rendahnya chl-a kemungkinan disebakan oleh massa air dari Samudera Pasifik yang dibawa oleh Arus Lintas Indonesia (ARLINDO). Water mass supply in the Philippine Sea and northern Maluku derived from the Pasific Ocean. The variability of chlorophyll-a (chl-a) was affected by the supply of water mass from the area or the impact of air and sea interactions. This study aimed to define the effect of air-sea interaction on the spatial and temporal variability of chl-a. The required data in this study was satellite image data with the period 2003-2019 and argo float. The results showed that chl-a in the Philippine Sea was always below 0.1 mg / m3 throughout the year and the northern Maluku Sea increased during the eastern monsoon (0.27 mg / m3). The increasing of chl-a in the northern Maluku Sea was followed by the increasing of wind speed (east monsoon) which impacted the Ekman Mass Transport (EMT). EMT moved to the northeast carrying the water mass away from the coast and turned up coastal upwelling process. Coastal upwelling was the main factor of chl-a increasing in the North Maluku Sea. In otherwise, wind speed increasing in the Philippine Sea caused vertical mixing (west monsoon) but did not increase chl-a. The stable value of chl-a throughout the years in the Philippine Sea verified that strong wind speeds are not too dominant to affect the variability of chl-a.. The low chl-a was probably caused by the water mass from the Pacific Ocean that carried by Indonesian Through Flow (ARLINDO).

Kajian Perubahan Luasan untuk Prediksi Simpanan Karbon Ekosistem Mangrove di Desa Kaliwlingi, Kabupaten Brebes Faishal Widiaputra Nugraha; Rudhi Pribadi; Anindya Wirasatriya
Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v9i2.30039

Ekosistem mangrove memiliki potensi besar dalam penyerapan CO2 dari atmosfer. Jumlah kadar CO2 yang tersimpan pada ekosistem mangrove semakin berkurang seiring menyusutnya luasan ekosistem mangrove tersebut. Ekosistem mangrove Kabupaten Brebes diduga telah mengalami perubahan luasan sehingga berpengaruh terhadap jumlah CO2 yang terserap. Penelitian ini bertujuan untuk mengetahui perubahan luasan dan prediksi simpanan karbon ekosistem mangrove di Desa Kaliwlingi, Kabupaten Brebes. Penelitian ini dilakukan pada bulan Mei 2019 dengan menggunakan metode deskriptif. Citra yang digunakan adalah citra satelit Landsat tahun 1996, 2000, 2007, 2010, 2015, dan 2019. Pengolahan citra dilakukan dengan bantuan software Er Mapper 7.0 dan Arcmap 10.4.1. Tahapan identifikasi mangrove menggunakan komposit band RGB 564, kemudian dilakukan pemisahan obyek mangrove dan non mangrove dengan menggunakan metode unsupervised classification. Metode analisis kerapatan mangrove yang digunakan adalah algoritma NDVI. Perhitungan nilai kandungan biomassa berdasarkan rumus allometrik tiap spesies. Perubahan luasan ekosistem mangrove di Desa Kaliwlingi, Kabupaten Brebes tahun 1996 - 2019 berturut-turut adalah 51,84 ha, 114,30 ha, 43,29 ha, 163,62 ha, 286,38 ha dan 475,65 ha. Sedangkan prediksi nilai simpanan karbon total adalah ± 689,57 ton, ± 1474,18 ton, ± 541,07 ton, ± 2612,17 ton, ± 4324,36 ton, dan ± 6778,30 ton. Nilai simpanan karbon total pada ekosistem mangrove di Desa Kaliwlingi, Kabupaten Brebes meningkat seiring dengan bertambahnya luasan ekosistem mangrove tersebut. Mangrove ecosystems have great potential in absorbing CO2 from the atmosphere. The amount of CO2 stored in the mangrove ecosystem decreases as the area of the mangrove ecosystem shrinks. The mangrove ecosystem area of Brebes Regency was justified decreased as well as the CO2 absorption. This study aims to determine changes in the extent and predictions of carbon stock of mangrove ecosystems in Kaliwlingi village, Brebes Regency. This research was conducted in May 2019 using descriptive methods. The imagery used was Landsat satellite imagery in 1996, 2000, 2007, 2010, 2015 and 2019. Image processing was carried out with the help of Er Mapper 7.0 and Arcmap 10.4.1 software. The stages of mangrove identification using the RGB 564 composite band, then the separation of mangrove and non-mangrove objects was carried out using the unsupervised classification method. The mangrove density analysis method used was the NDVI algorithm. Calculation of biomass value based on the allometric formula for each species. Changes in the extent of mangrove ecosystems in Kaliwlingi village, Brebes Regency in 1996 - 2019 were 51.84 ha, 114.30 ha, 43.29 ha, 163.62 ha, 286.38 ha and 475.65 ha, respectively. While the predicted values of total carbon stock were ± 689,57 ton, ± 1474,18 ton, ± 541,07 ton, ± 2612,17 ton, ± 4324,36 ton, dan ± 6778,30 ton. The values of total carbon stock in the mangrove ecosystem in Kaliwlingi village, Brebes Regency was increased along with the expansion of the mangrove ecosystem.

Identifikasi Fishing Ground Ikan Teri (Stolephorus sp) Menggunakan Citra Modis di Perairan Karimunjawa, Jepara Rizky Aditya; Anindya Wirasatriya; Kunarso Kunarso; Lilik Maslukah; Petrus Subardjo; Agus Anugroho Dwi Suryosaputro; Gentur Handoyo
Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Fishing ground atau zona penangkapan ikan adalah suatu kawasan perairan yang menjadi sasaran dalam usaha penangkapan ikan. Ikan teri merupakan hasil tangkapan ikan yang populer di Karimunjawa. Penelitian ini bertujuan memprediksi zona tangkapan ikan di Perairan Karimunjawa berdasarkan sebaran klorofil-a dan suhu permukaan laut dengan memanfaatkan data citra satelit Aqua Modis level-3. Sebaran klorofil-a yang tinggi terlihat pada bulan Mei sampai Juli. Nilai korelasi antara klorofil-a dengan tangkapan ikan di lapangan sebesar r=0,869 yang berarti berhubungan sangat erat. Sedangkan nilai korelasi Suhu Permukaan Laut (SPL) dengan tangkapan ikan hanya sebesar r=0,387. Hal ini berarti hasil tangkapan ikan teri di Kepulauan Karimunjawa lebih dipengaruhi oleh sebaran klorofil-a dari pada SPL. Oleh karena itu dalam penentuan potensi fishing ground dengan menggunakan data MODI klimatologi bulanan, kami hanya menggunakan parameter klorofil-a. Perairan Karimunjawa memiliki kandungan klorofil-a rata rata sebesar 0,29 mg/m3. Berdasarkan analisa sebaran klorofil-a klimatologi bulanan, lokasi potensi fishing ground berada pada barat dan tenggara dari perairan Pulau Nyamuk, Barat Pulau Kemujan termasuk Pulau Cemara Besar dan Kecil, dan di perairan sekitar Pulau Parang yang dapat ditemukan disetiap bulannya. Anchovy Ground Fishing Identification (Stolephorus sp) Using Fashionable Images in the Waters of Karimunjawa, Jepara Fishing ground or fishing zone is an area in the ocean which becomes a target for fishing activities. Common target for fishing activity in Karimunjawa is anchovy. The aim of this study is to predict fishing zone on the waters of Karimunjawa based on the chlorophyll distribution and sea surface temperature by utilizing level 3 Aqua MODIS data. The high chlorophyll-a distribution is observed from May to July. The correlation value between chlorophyll-a and fish catch based on insitu data is strong with r = 0.869. Conversely, the correlation between insitu SPL correlation and fish catch is weak with r = 0.38. Therefore, we only used chlorophyll-a parameter to determine the potential fishing ground in Karimun Jawa. Karimunjawa waters have an average chlorophyll-a conscentration of 0.29 mg/m3, Based on monthly climatology of MODIS chlorophyll data, the location of potential fishing ground is west and southeast from the waters of the island of Nyamuk, the west of Kemujan Island including Pulau Cemara Besar and Kecil, and in the waters around Parang Island which can be found every month.

Analisis Sebaran Klorofil-A dan Suhu Permukaan Laut sebagai Fishing Ground Potensial (Ikan Pelagis Kecil) di Perairan Kendal, Jawa Tengah Andita Agung; Muhammad Zainuri; Anindya Wirasatriya; Lilik Maslukah; Petrus Subardjo; Agus Anugroho Dwi Suryosaputro; Gentur Handoyo
Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Perairan Kendal merupakan salah satu kabupaten di Jawa Tengah dengan luas wilayah ± 1.002,23 dan mengalami perkembangan pesat terutama di bidang perikanan. Perairan Kendal adalah salah satu wilayah penyebaran ikan demersal dan pelagis yang cukup potensial di perairan Utara Jawa Tengah. Tujuan penelitian ini untuk memprediksi zonasi fishing ground ikan pelagis kecil di Perairan Kendal berdasarkan parameter klorofil-a dan suhu permukaan laut. Penelitian ini menggunakan metode kuantitatif, penentuan lokasi pengambilan sampel menggunakan metode purposive sampling. Berdasarkan hasil penelitian diketahui bahwa perairan Kendal memiliki nilai konsentrasi klorofil-a berkisar antara 0.34 – 4.86 mg/ konsentrasi tertinggi di Timur Laut muara sungai Bodri dan di ikuti dengan hasil tangkapan ikan paling banyak yaitu 53 kg. Konsentrasi suhu permukaan laut berkisar 30,5 - 31ᵒC. Perbedaan nilai konsentrasi klorofil-a dan suhu permukaan laut dipengaruhi oleh angin yang berhembus di perairan sehingga diduga mengakibatkan terjadinya proses mixing. Analysis of Chlorophyll-A Distribution and Potential Sea Surface As Fishing Ground Temperature in Kendal Coastal, Central JavaThe waters of Kendal is one district in Central Java with an area of ± 1.002.23 and experienced rapid development, especially in the field of fisheries. The waters of Kendal is one of the potential demersal and pelagic fish distribution areas in the waters of North Central Java. The purpose of this study was to predict the potential fishing ground of small pelagic fish in Kendal Waters based on the parameters of chlorophyll-a and sea surface temperature. This research uses quantitative method while determining the location of sampling using purposive sampling method. Based on the research results it can be seen that the waters of Kendal has a value of chlorophyll-a concentration ranging from 0.34 - 4.86 mg/ with the highest concentration that is in the Northeast estuary Bodri river and followed by the catch of most fish that is 53 kg. Concentrations of sea surface temperature range from 30.5 - 31ᵒC. Differences in the value of a-chlorophyll concentration and sea-surface temperatures across the waters are influenced by winds that blow in the waters resulting in a mixing process.

Spatio-Temporal Distribution of Chlorophyll-a in Semarang Bay using Sentinel-3 Muhamad Hafiz Maulavi Haban; Kunarso Kunarso; Teguh Prayogo; Anindya Wirasatriya
Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v11i1.40201

Chlorophyll-a is an indicator for the fertility of waters. The oceanographic conditions make the distribution of chlorophyll-a in waters always changes every season, both spatial and temporal. The aim of this research is to determine the spatial and temporal distribution of chlorophyll-a in Semarang Bay using Sentinel-3 OLCI imagery. Sentinel-3 OLCI imagery has a resolution of 300 m x 300 m, based on the spatial resolution generated by Sentinel-3 OLCI imagery to further examine the spatial distribution of chlorophyll-a in Semarang Bay with better spatial resolution. This research also used wind, current, temperature and salinity data from the Reanalysis Model which were processed using the SNAP program with C2RCC method. It is found that the distribution of chlorophyll-a in the Semarang Bay showed a varied pattern spatially and temporally. Temporally, the highest chlorophyll-a concentration occurred in January and the lowest was in June. Spatially, chlorophyll-a on the coast of Semarang and Demak is higher than that on the coast of Kendal in the west season, but entering the east season the highest chlorophyll-a is on the Kendal coast than on the coast of Semarang and Demak. Chlorophyll-a distribution in Semarang Bay mostly influenced by river run off and wind.

AIR-SEA FLUX OF CO2 IN THE WATERS OF KARIMUNJAWA ISLAND, INDONESIA Nurul Latifah; Sigit Febrianto; Anindya Wirasatriya; Hadi Endrawati; Muhammad Zainuri; Suryanti Suryanti; Andreas Nur Hidayat
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.171-178

The purpose of this study was to determine the distribution of CO2 flux in Karimunjawa in the east monsoon. The variables in this study were temperature; pH; salinity; DO; CO2 atm was measured using a CO2 meter; chlorophyll-a, phosphate, silicate were measured spectrophotometric method. Total Alkalinity / TA was measured using the titration method with the principle of changing pH; DIC (Dissolved Inorganic Carbon) was measured using CO2sys software. The partial pressure of seawater carbon dioxide calculated using formula: pCO2sea = 6.31T2 + 61,9 Chla2 – 365.85T – 94.41 Chl-a +5715.94, the partial pressure of atmospheric carbon dioxide calculated using formula: pCO2atm = xCO2atm (pb - pH2O). The calculation of the estimated CO2 flux using the formula: Flux CO2 = Kh x kwa x (∆pCO2) , if the CO2 flux has a positive value water acts as a CO2 source, and if it is negative, the waters act as a CO2 sink.. CO2 flux in Karimunjawa waters during east monsoon (represented by August 2018) showed that in Karimunjawa waters with normal pH 7.2-7.4 were dominated by bicarbonate ion HCO3-with an average value of DIC 1847.24 µmol/kg dan TA 1912.51 µmol/kg. The partial pressure of seawater CO2 is higher than the partial pressure of atmospheric CO2 this indicates that the role of Karimunjawa waters as a source of CO2 where there is release of carbon dioxide into the atmosphere with CO2 flux values ranging from 8.549 – 13.272 mmol m-2 day-1. The variables that affect the flux of CO2 were the pCO2sea and ΔpCO2 with a very strong and positive correlation. These two variables were influenced by sea water temperature, salinity, chlorophyll-a, phosphate and silicate.

STUDY OF MIXED LAYER DEPTH VARIATION IN LIRAN ISLAND WATERS, SOUTHWEST MALUKU, APRIL 2016 Andriana Kartina Wingtyas; Agus Anugroho Dwi; Anindya Wirasatriya; Muslim Muslim; Teguh Agustiadi
International Journal of Marine and Aquatic Resource Conservation and Co-existence Vol 2, No 1 (2017): IJMARCC
Publisher : International Journal of Marine and Aquatic Resource Conservation and Co-existence

ABSTRACTLiran Island waters are located between two seas, the Banda Sea and the Timor Sea. These waters are also the border between Republic of Indonesia and the Democratic Republic of Timor Leste (RDTL). The thickness of mixed layer depth in Liran Island waters are vary. This is assumed as a result of the influence of transition season I wind that blew in the area in April 2016. This study aims to determine the variation of the thickness layer mixed layer Liran Island waters, Southwest Maluku District on April 2016 caused by the transition season I wind. The methodology that used in this research is descriptive method with quantitative approach. The main data that used in this study is in situ sea temperature data, while the supporting data that used in this study is wind data which measured directly in the field for 9 days. The result of this research is based on determination of layer mixed layer using criterion ΔT = 1.0 0C. The west part of Liran Island had thinnest layer mixed layer depth that is about 20 - 38 m. The east part of Liran Island waters had the thickest mixed layer depth which up to 55 m. Meanwhile, the north part of Liran Island waters had a thickness of mixed layer between the eastern and western waters of 40 m. This related to the wind that blowing from the southwest to the northeast and causing a downwelling phenomenon in the east part of Liran Island waters and upwelling phenomenon in the west part of Liran Island waters while the north part of Liran Island waters did not get a great influence from the movement of the wind because of its location which protected by Liran Island itself. Key words: mixed layer depth, the transitional monsoon I, Liran Island waters

Phosphorous fractionation distribution in surface sediments of the Jobokuto Bay Lilik Maslukah; Anindya Wirasatriya; Muh Yusuf; Resy Sekar Sari; Ummu Salma; Muhammad Zainuri
Molekul Vol 16, No 2 (2021)
Publisher : Universitas Jenderal Soedirman

Phosphorus (P) is an essential nutrient that can limit primary productivity in waters. Phosphorus has significant impact on the biogeochemical cycle in marine ecosystems. Surface sediments play an important role in the nutrient dynamics. Riverine input is sources of P to the ocean and sediment plays an important role as a source or sink of P in the coloumn of water. Phosphorous (P) availability is regarded as the most important factor for determining the water quality in coastal waters. However, not all of the P fractions can be released from the sediment. This study was conducted to identify the distribution of phosphorus (P) fractionation in the sediment surface of Jobokuto Bay. Samples were collected from ten locations. Percentage of sedimentary parameters such as sand, silt, clay, and organic carbon were analyzed to find out their relation with various P fractions. The sediment found was mostly sand at the station near to the coast and mud (silt and clay) at offshore stations. The results showed that Ca-P dominant (56.03%) and percentages of Fe-P, OP, and Ads-P were 23.43, 17.41, and 3.2% respectively. Terrestrial inputs and biological deposits cause Ca-P dominant. The bioavailability of P fractions were ranged from 34.45 to 56.1% of the total P (TP) content. The high concentrations of the Ads-P was found in the mud fraction and located at offshore stations. The order of abundance of the major forms of P in the surface sediments of Jobokuto bay is as follows: Ca-P > Fe-P > OP > Ads-P

Co-Authors Adinda Rizki Amalia Adivitasari, Reska Mega Adzkia Pincta Milenia Afrina Aysira Agus Hartoko Ambariyanto Ambariyanto Andhita, Laviola Reycha Fitri Andita Agung Andreas Nur Hidayat Andriana Kartina Wingtyas Anggoro, Tri Danny Anggraeni, Nimas Ratri Kirana Anisa Dewi Nugraheni Aris Ismanto Ashilah, Azizah Anis Attaqwa, Rizal Aziis, Dimas Miftahul Bahiyah, Amirotul Baskoro Rochaddi Bayu Munandar Budi Purwanto Claus, Berril Denny Nugroho Sugianto Dini Oktaviani Dwi Haryo Ismunarti Dwi Haryo Ismunarti Eko Setyobudi Elis Indrayanti Elsa Mayora Jovanka Putri Enita, Siti Yasmina Faishal Widiaputra Nugraha Faizal Rachman Fajar Hudoyo Febrianto, Sigit Firman Ramadhan Fressan Patrick Wangdiarta Fuji Anida Futoki Sakaida Galuh Permatasari Gentio Harsono Gentio Harsono Gentur Handoyo Georgina Faulia Rachman Gultom, Iqbal S. Gunady, Stephanie Michelle Hadi Endrawati Hariyadi Hariyadi Hariyadi, Hariyadi Hasrizal Bin Shaari Hastuti Hastuti Heryoso Setiyono Heryoso Setiyono Himawa, Daenk Hiroshi Kawamura Indra Budi Prasetyawan Indra Budi Prasetyawan Irsyad Abdi Pratama Iskhaq Iskandar Ita Widowati Jarot Marwoto Jayawiguna, Muhammad Hikmat Jihadi, Muhammad Shulhan Johannes Hutabarat Jusup Suprijanto Juviani, Dian Kevifa Satria Widjaya Krisna, Heru Nur Kunarso Kunarso Lilik Maslukah Louis Jannahtuna'im Koes Miranda Lukman, Annisa Aulia Maria Griselda Novita Maro, Jahved Ferianto Maulana Al Faridzie Metrio Swandiko Muh Yusuf Muh Yusuf Muhamad Hafiz Maulavi Haban Muhamamd Helmi Muhammad Faiq Marwa Noercholis Muhammad Helmi Muhammad Helmi Muhammad Zainuri Muslim Muslim Mustaqim, Ikhsan Nabilah Rizki Niken Dwi Prasetyarini Novi Susetyo Adi Nugraha, R. Bambang Adhitya Nugroho Agus D Nurul Hickmah Nurul Latifah Parichat Wetchayont Parichat Wetchayount Petrus Subardjo Pratama, Dhimas Prabu Prayogi Prayogi Purwanto Purwanto Purwanto Purwanto Raden Ario Rahmadiana Andini Respati, Deodato Naresvara Rayi Resy Sekar Sari Resy Sekar Sari Retno Hartati Ridarto, Arij Kemala Yasmin Rifqi N. Agassi Rikha Widiaratih Riza Yuliratno Setiawan Rizky Aditya Rudhi Pribadi Sabila, Anis Yasmin Sadewo, M. Firouz Dimas Saragih, Laurentia Alexandra Seprianto, Abdal Simangunsong, Felix Gok Asi Simatupang, Ariel Oscar Paskario Sinaga, Boby Christian Sri Murtiana Sri Yulina Wulandari Sugeng Widada Sunaryo Sunaryo Suryanti - Susilodewi, Sinta Dwis Teguh Agustiadi Teguh Prayogo Teuku Fauzan Zul Aufar Ulung Jantama Wisha Ummu Salma Warisatul Anbiya Selkofa. M Warsito Atmodjo Wetchayont, Parichat Widiaratih, Rikha Widodo S Pranowo Widodo S. Pranowo Widodo, Dzaky Malik Putra Wijaya Mardiansyah, Wijaya Yeyen Novita Sari Yuhendrasmiko, Randy Zulfa, Istna Nabila

Title

Found 64 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 64 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 64 Documents
Search