Article Per Year (5 Year)
p-Index From 2020 - 2025
1.713
P-Index
This Author published in this journals
All Journal Indonesian Journal of Geography ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA IJOG : Indonesian Journal on Geoscience Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Kelautan Tropis BULLETIN OF THE MARINE GEOLOGY Jurnal Kebijakan Perikanan Indonesia Geosains Kutai Basin
Radjawane, Ivonne Milichristi
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 11 Documents
Search

 1   2 
Seasonal Variability of Sea Surface Chlorophyll-a at West Borneo Island Radjawane, Ivonne Milichristi; Saleh, Ejria; Napitupulu, Gandhi; Abdillah, Muhammad Rais; Hassan, Mohd Azamuddin Mohd
Indonesian Journal of Geography Vol 56, No 1 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.87713

Abstract

The optimization of marine fisheries activities can be achieved through an understanding of the timing of fishing, access to good information, and knowledge of oceanographic conditions. These conditions often lead to significant nutrient enrichment in the surface layer of the ocean, which in turn increases the sea surface chlorophyll-a (SSC). In the context of the west Borneo Island region, seasonal variability in SSC plays a crucial role in determining potential fishing grounds. The objectives of this study are  examining the seasonal variability of SSC, identifying upwelling and downwelling processes through analysis of sea surface wind (SSW), and determining the climatological distribution of Sea Surface Temperature (SST) and sea surface height (SSH) within the water off Labuan Island, Malaysian Borneo, and the Karimata Strait, West Kalimantan, Indonesia. Remote sensing data spanning from 2007 to 2021 were analyzed, encompassing SSC, SST, SSH anomalies, SSW, wind stress curl, and Ekman pumping. Additionally, rainfall and river discharge were examined as supplementary indicators of these oceanographic processes. The findings indicate that SSW plays a pivotal role in driving upwelling and downwelling processes, which in turn influence SSC variability. In Labuan waters, upwelling occurs primarily from November to February, while downwelling predominates from June to September. In contrast, in the Karimata Strait, upwelling is identified from July to September, with downwelling prevalent between March and May. Upwelling events in both regions are characterized by increasing SSC, accompanied by decreasing SST and SSH, while the opposite trends are observed during downwelling events. The peak of rainfall and river discharge in December is noted to potentially enhance SSC variability in the Karimata Strait compared to Labuan Island waters.
PENGELOLAAN DAN PEMANFAATAN KAWASAN PESISIR PULAU MIANGAS SEBAGAI PULAU KECIL TERLUAR INDONESIA Nagi, Achmad; Jamaluddin, Jamaluddin; Napitupulu, Gandhi; Nurdjaman, Susanna; Setyobudiandi, Isdradjad; Radjawane, Ivonne Milichristi
Jurnal Kebijakan Perikanan Indonesia Vol 15, No 1 (2023): (Mei) 2023
Publisher : Pusat Riset Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jkpi.15.1.2023.%p

Abstract

Pulau Miangas merupakan salah satu pulau terluar yang berbatasan dengan negara Filipina dan terletak di wilayah administratif Kabupaten Kepulauan Talaud di Provinsi Sulawesi Utara. Sumber daya alam yang ada memiliki potensi yang besar untuk pemanfaatan wilayah pesisir dan laut yang dimilikinya. Tujuan dari penelitian ini adalah menganalisis potensi, kelayakan dan prioritas komersial untuk pemanfaatan sumber daya pesisir Pulau Miangas. Survei dengan pengamatan secara langsung dan metode wawancara digunakan untuk mengumpulkan data dan informasi. sedangkan metode analisis sistem informasi geografis (SIG) digunakan untuk mengevaluasi kelayakan penggunaan lahan di wilayah pesisir. Melalui empat tahapan analisis yang meliputi penyusunan peta wilayah, matriks cakupan per kategori, pemberian bobot dan scoring, serta analisis spasial. Hasil analisis kesesuaian lahan dengan menggunakan SIG menunjukkan bahwa kawasan pesisir Pulau Miangas memiliki potensi untuk berbagai program pembangunan terkait pengelolaan dan pemanfaatan pesisir, seperti kawasan pemukiman, kawasan budidaya rumput laut, kawasan penangkapan ikan, kawasan budidaya keramba jaring apung, budidaya mutiara dan konservasi terumbu karang.Miangas Island is one of the outermost islands bordering the Philippines and is located in the administrative area of the Talaud Islands Regency in North Sulawesi Province. The existing natural resources have great potential for the utilization of coastal and marine areas. The purpose of this study was to analyze the potential, feasibility and commercial priorities for the utilization of coastal resources of Miangas Island. Direct observation surveys and interview methods were used to collect data and information, while geographic information system (GIS) analysis methods were used to evaluate the feasibility of land use in coastal areas. Through four stages of analysis that include the preparation of area maps, coverage matrix per category, weighting and scoring, and spatial analysis. The results of the land suitability analysis using GIS show that the coastal area of Miangas Island has the potential for various development programs related to coastal management and utilization, such as residential areas, seaweed cultivation areas, fishing areas, floating net cage cultivation areas, pearl cultivation and coral reef conservation.
Pengaruh Sirkulasi Arus Geostropik dan Ageostropik Terhadap Upwelling di Perairan Selatan Jawa Radjawane, Ivonne Milichristi; Yusarita, Alvi; Kuswardani, Anastasia Rita Tisiana Dwi; Napitupulu, Gandhi
Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i3.62368

Abstract

Perairan selatan Jawa merupakan lokasi dengan fenomena upwelling yang signifikan. Penelitian bertujuan untuk memahami kecepatan dan pola arus geostropik serta ageostropik orde dua musiman dari permukaan hingga kedalaman 600 m. Nilai Ekman pumping velocity (EPV) yang dibangkitkan oleh angin menunjukkan upwelling mulai bulan Juni, mencapai puncaknya dari Juli hingga September, dan menurun mulai Oktober, hampir menghilang pada November. Nilai EPV antara perairan Jawa Barat dan Timur menunjukkan tingkat upwelling yang lebih tinggi di sebelah barat. Data CTD menegaskan bahwa upwelling terjadi selama musim Timur (Juni-Agustus), ditandai dengan penurunan suhu air, dangkalnya termoklin, dan peningkatan salinitas terhadap kedalaman. Pada musim barat (Desember-Februari), arus geostropik cenderung ke timur di sepanjang pantai Jawa Barat karena arus selatan Jawa (ASJ), sementara di selatan Jawa Tengah dan Jawa Timur, arah arus ke barat disebabkan oleh arus lintas Indonesia (Arlindo) dan arus ekuator selatan (AES). Pada musim timur, ASJ melemah, dan arah arus geostropik berubah ke barat, memperkuat ASJ dan Arlindo. Sirkulasi Sekunder Ageostropik, diperkirakan melalui metode C-Vektor, memainkan peran dalam pergerakan massa air vertikal, meningkatkan intensitas upwelling di perairan selatan Jawa. Wilayah sekitar Jawa Timur memiliki komponen C-Vektor positif yang berdampak pada peningkatan intensitas upwelling di daerah tersebut.   The southern waters of Java are a location with significant upwelling phenomena. The study aimed to understand the velocity and pattern of seasonal second-order geostropic and ageostropic currents from the surface to 600 m depth. Wind-generated Ekman pumping velocity (EPV) values show upwelling starting in June, peaking from July to September, and decreasing from October, almost disappearing in November.. The EPV values between western and eastern Java waters show higher levels of upwelling in the west. CTD data confirms that upwelling occurs during the East season (June-August), characterized by decreasing water temperature, shallow thermocline, and increasing salinity with depth. In the West season (December-February), geostropic currents tend to be eastward along the West Java coast due to the South Java Current (SJC), while south of Central Java and East Java, the current direction is westward due to the Indonesian Throughflow ( ITF ) and the South Equatorial Current (SEC). In the eastern season, the SJC weakens, and the direction of the geostropic current changes to the west, strengthening the SJC and ITF. The Ageostropic Secondary Circulation, estimated through the C-Vector method, plays a role in the vertical movement of water masses, increasing the intensity of upwelling in the waters south of Java. The region around East Java has a positive C-Vector component which has an impact on increasing the intensity of upwelling in that area.
Karakteristik Estuari di Muara Angke pada Musim Timur Radjawane, Ivonne Milichristi; Mughny, Grahadi Pandu; Napitupulu, Gandhi
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.20679

Abstract

Estuaries are important transitional environments between freshwater and marine ecosystems. These areas are often centers of economic activity, environmental sustainability and natural resources. In this context, this study aims to investigate the estuary characteristics of Muara Angke, particularly in terms of changes in water level, salinity, and the influence of river flow in the face of changing tidal conditions. Research on estuary characteristics in one of the Ciliwung River Estuaries was conducted on August 9-10, 2015. The research area is Muara Angke, North Jakarta, DKI Jakarta Province. The measurement point consists of 11 stations starting from point A1 at the mouth of the estuary to point A11 which is the farthest station point from the estuary, with a distance of 200 m between stations. Oceanographic parameter measurements were made at 3 depths (0.2h; 0.6h and 0.8h) with 4 tidal conditions (towards the tide, tide, towards the ebb and ebb). Angke Estuary has a diurnal tidal type with a range of water levels between 0.98 m - 1.41 m and an average discharge of 7.75 m3/s during the measurement time. The results showed that the Angke Estuary has a partially mixed estuary type with salinity values at the surface increasing relatively small to the middle layer and also the bottom layer decreasing relatively small to the middle layer which indicates vertical mixing from the bottom to the surface. In addition, based on the estuary numbers (  = 0.337;  = 0.279;  = 0.593), there is a freshwater flow that is smaller or equal to the tidal influence. Salinity intrusion occurs as far as 2 km when conditions are towards high tide and  high tide. Estuari merupakan lingkungan peralihan yang penting antara ekosistem air tawar dan laut. Daerah ini sering kali menjadi pusat kegiatan ekonomi, keberlanjutan lingkungan, dan sumber daya alam. Dalam konteks ini, penelitian ini bertujuan untuk menginvestigasi karakteristik estuari Muara Angke, khususnya dalam hal perubahan tinggi muka air, salinitas, dan pengaruh aliran sungai dalam menghadapi perubahan kondisi pasang surut. Penelitian mengenai karakteristik estuari di salah satu Muara Sungai Ciliwung telah dilakukan pada tanggal 9-10 Agustus 2015. Daerah penelitian adalah Muara Angke, Jakarta Utara Provinsi DKI Jakarta. Titik pengukuran terdiri dari 11 stasiun mulai dari titik A1 yang berada di mulut muara sampai dengan titik A11 yang merupakan titik stasiun terjauh dari muara, dengan jarak antar stasiunnya adalah 200 m. Pengukuran parameter Oseanografi dilakukan terhadap 3 kedalaman (0,2 ; 0,6  dan 0,8 ) dengan 4 kondisi pasang surut (menuju pasang, pasang, menuju surut dan surut). Muara Angke memiliki tipe pasang surut diurnal dengan kisaran tinggi muka air antara 0,98 m – 1,41 m dan debit rata-rata sebesar 7,75 m3/s selama waktu pengukuran. Hasil penelitian menunjukan bahwa Muara Angke memiliki tipe estuari tercampur sebagian (partially mixed) dengan nilai salinitas di permukaan yang bertambah relatif kecil ke lapisan tengah dan juga lapisan dasar yang berkurang relatif kecil ke lapisan tengah yang menandakan adanya percampuran secara vertikal dari dasar ke permukaan. Selain itu berdasarkan bilangan-bilangan estuari (  = 0,337;  = 0,279;  = 0,593) menunjukan adanya aliran air tawar yang besarnya lebih kecil atau sama dengan pengaruh pasang surutnya. Intrusi salinitas terjadi sejauh 2 km ketika kondisi menuju pasang dan pasang. 
Ketidakseragaman Sebaran Spasial Variabilitas Musiman Eddy di Perairan Barat Laut Indonesia Kartadikaria, Aditya Rakhmat; Napitupulu, Gandhi; Rangga, Kalaka; Radjawane, Ivonne Milichristi; Abdullah, Faizal Ade Rahmahuddin
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.20810

Abstract

Sea level anomaly (SLA) data spanning from 1993 – 2022 were used to analyze the characteristic of eddy current in Northwest Indonesian. An improved winding angle method was used and was able to detect 1663 anticyclonic eddies (AEs) and 1748 cyclonic eddies (CEs). The average eddy lifespan is approximately four weeks. The eddy in the West Indonesian Ocean has a radius ranging from 40 – 100 km and a high number of mesoscale eddy (radius more than 100 km) detected in the northern area of West Indonesian Ocean (4° N - 10° N). The eddy kinetic energy (EKE) increased proportionally with their radius, whereas the eddy vorticity decreased proportionally with their increasing radius. The seasonal cycles of eddy circulation in the west Indonesian Ocean were differ for both AEs and CEs, where AEs were dominated during east monsoon season (JJA) and CEs came with longer periods from November to March, yet for both AEs and CEs they have similar radius per month. During weak periods of both eddies, their meridional distributions differ; CEs tend to be formed in relatively lower latitude, while AEs were concentrated in relatively higher latitude. Data anomali permukaan laut/sea level anomaly (SLA) dalam kurun waktu 1993 – 2022 digunakan untuk mempelajari karakteristik sirkulasi arus eddy di perairan barat laut Indonesia. Metode Winding Angles yang telah dimodifikasi mampu mendeteksi 1663 anticyclonic eddies (AE) dan 1748  cyclonic eddies (CE). Rata-rata umur eddy yang terdeteksi adalah sekitar empat minggu. Mayoritas sirkulasi arus eddy memiliki radius 40 – 100 km dan eddy dengan radius berskala meso (lebih dari 100 km) banyak terkonsentrasi di bagian utara (4° N - 10° N) perairan barat laut Indonesia. Nilai energi kinetik eddy (EKE) bertambah sebanding dengan pertambahan radius, sedangkan nilai vortisitas berbanding terbalik dengan radius. Sirkulasi arus eddy di perairan barat laut Indonesia pada musim timur (JJA) didominasi oleh AE , sedangkan CE mendominasi di musim barat (DJF) dengan periode yang lebih panjang dari November hingga Maret, namun dengan rata-rata radius yang sama setiap bulannya. Pada saat periode di mana kejadian eddy minimum, ditemukan perbedaan letak distribusi meridional eddy bervortisitas tinggi yang menunjukkan CE lebih didukung pembentukannya pada lintang yang lebih rendah daripada AE. 
ZOOPLANKTON DISTRIBUTION FROM BACKSCATTER DATA OF ADCP INSTRUMENT IN WEST SUMATRA WATERS Napitupulu, Gandhi; Farihah, Rizqi Ayu; Manik, Henry Munandar; Larasati, Oktavira Dwi Demia; Napitupulu, Moses; Bernawis, Lamona Irmudyawati; Radjawane, Ivonne Milichristi; Kusmanto, Edi
BULLETIN OF THE MARINE GEOLOGY Vol 39, No 2 (2024)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.39.2.2024.871

Abstract

Acoustic Doppler Current Profiler (ADCP) conventionally used to monitor ocean current profiles and potentially detect zooplankton distribution remains largely unexplored. Zooplankton are key consumers in the marine food chain, therefore understanding their distribution is critical. This study aims to map the distribution of zooplankton in West Sumatra waters using ADCP backscatter data. Data analyzed encompass ocean current measurements, backscatter, and conductivity-temperature-depth (CTD) profiles collected from March 1 to 3, 2017. Raw ADCP digital counts were converted into mean volume backscattering strength (MVBS) in dB using sonar equations, proportional to zooplankton biomass. The conversion process involved corrections for sound attenuation due to distance and water absorption, ADCP transducer angle correction, and noise correction. Processing results revealed zooplankton distribution in raw ADCP data ranging from 20 to 160 counts and in MVBS data spanning -140 dB to -40 dB. MVBS values derived from ADCP acoustic signal processing were filtered within the -100 dB to -60 dB range, representing the zooplankton backscatter range. Zooplankton distribution was observed at depths of 0-300 m. Vertical zooplankton distribution was generally high in the 100-200 m layer and decreased at 0-100 m and 200-300 m. This is attributed to the influence of the Equatorial Undercurrent transporting zooplankton biomass from the Indian Ocean to West Sumatra waters at depths of 100-200 m, characterized by high salinity (34.6-35.2 PSU) and cold temperatures (19°-21°C). This study demonstrates the utility of ADCP in observing zooplankton distribution based on their backscatter values and the influence of ocean currents in transporting zooplankton biomass.
Coral Reef Restoration for Coastal Protection: Water Quality Monitoring in Indonesia Coral Reef Garden Nusa Dua, Bali Burhanuddin, Safri; Badriana, Mochamad Riam; Nur, Ashadi Arifin; Abdurrahman, Umar; Jeon, Chungkyun; Radjawane, Ivonne Milichristi; Park, Hansan; Hutahaean, Andreas Albertino
Indonesian Journal on Geoscience Vol. 11 No. 3 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.3.455-470

Abstract

The Indonesia Coral Reef Garden (ICRG) is a coral reef restoration program with Nusa Dua as one of five sites in Bali. A plantation program has been done by 2020, but it is necessary to monitor the condition. A field survey in Nusa Dua was carried out on October 3-4, 2022 to measure and check ocean parameters that are suitable for coral life and diving in artificial coral reefs installed. In the survey, several points had been measured through CTD Valeport Midas+ prior to measuring ocean parameters in the same location as a preliminary survey done two years in advance. The sea condition of temperature, salinity, pH, turbidity, and DO is 24.89 - 28.69 °C, 33.75 - 34.22 psu, 8.0 - 8.1, 1.19 - 4.27 FTU, and 4.47 - 5.24 mg/L, respectively. Based on the conformity of water quality, the water condition is good for coral growth. A total of 15 locations are used to put artificial coral reefs in many forms or structures. The coral plantation program in Nusa Dua shows promising progress in qualitatively consisting of species of Montipora sp., Acropora sp., and Alcyonacea sp. A continuous measurement is demanded to monitor the condition of coral growth quantitatively.
Effect of El-Niño Southern Oscillation (ENSO) on Heat Transport in The Indonesia Throughflow Passages and Ocean Heat Content in The Banda Sea Pratama, Khafid Rizki; Radjawane, Ivonne Milichristi; Pratama, Bayu Edo
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 1 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.1.92-102

Abstract

Indonesia Throughflow (ITF) flows water mass from the Northern Pacific Ocean to the Indian Ocean through Indonesian waters. This research was conducted in the Eastern Indonesia waters in 2009–2019 using Copernicus Marine Environment Monitoring Service (CMEMS) reanalysis and World Ocean Database (WOD) to analyze heat transport in ITF passages and ocean heat content in the Banda Sea. The analysis shows that ITF and heat transport have a strong relationship with a correlation of 0.7 during El-Niño Southern Oscillation (ENSO). Regarding the vertical profile by depth, heat transport in the Makassar Strait during La Niña was detected to be stronger in the Labani Channel and Central Sulawesi water, with values of -1.2 PW and -0.6 PW. Then, in the Lifamatola Strait, it was identified as strengthening in the Lifamatola Channel and Halmahera Strait with a value of -0.5 PW and -0.3 PW. The lag correlation between heat transport and the Oceanic Niño Index (ONI) shows a lag time of around 3-4 months, with the ENSO preceding heat transport. Mixed layer depth has an inverse relationship and salinity has a direct relationship with ENSO. Meanwhile, salinity has a relationship that is directly proportional to the ENSO. Another influence is the Rossby (Kelvin) waves when La Niña (El Niño) propagates to the West (Central) Pacific region, which tends to cause higher (lower) sea level elevations so that ITF and heat transport become strong (weak). It causes the ocean heat content (OHC) to increase during La Niña and decrease during El Niño.
Karakteristik dan Variasi Musiman Eddy di Perairan Pasifik Bagian Barat Laut Akbar, M. Apdillah; Radjawane, Ivonne Milichristi; Nurdjaman, Susanna; Napitupulu, Gandhi; Hatmaja, Rahaden Bagas
Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i1.62747

Abstract

Samudra Pasifik barat laut merupakan wilayah yang penting secara geografis dan ekologis, Samudra ini dilalui North Equatorial Current (NEC), South Equatorial Current (SEC), dan North Equatorial Counter Current (NECC), pertemuan arus-arus tersebut dapat mengakibatkan terbentuknya eddy. Eddy merupakan pola sirkulasi air berputar yang memainkan peran penting dalam transpor massa, energi, dan nutrien di lautan. Eddy di belahan bumi utara (BBU) yang bergerak berlawanan jarum jam disebut siklonik eddy (CE) dan yang bergerak searah jarum jam disebut antisiklonik eddy (AE). Penelitian ini bertujuan untuk menginvestigasi karakteristik dan variasi musiman eddy di perairan Pasifik barat laut. Data harian anomali muka laut dan kecepatan geostropik dari satelit altimetri selama periode tahun 2003 hingga 2022 dianalisis untuk mengidentifikasi eddy berdasarkan ukuran, masa hidup, dan distribusi spasialnya. Deteksi eddy menggunakan metode hybrid antara SLA kontur tertutup dan parameter Okubo-Weiss. Ditemukan 435 eddy di perairan Pasifik barat laut dengan AE sebanyak 201 dan CE sebanyak 234 dalam kurun waktu 20 tahun. Hasil menunjukkan pola musiman yang jelas dalam distribusi spasial dan kekuatan eddy. Musim timur memiliki aktivitas eddy yang lebih tinggi daripada musim barat, kemungkinan terkait dengan faktor iklim regional seperti perubahan suhu permukaan laut dan pola angin musiman. Penelitian ini memberikan wawasan penting tentang dinamika eddy di Pasifik barat laut dan dapat dikembangkan untuk pengelolaan sumber daya laut dan mitigasi risiko bencana alam di wilayah tersebut.
Tren Kenaikan Suhu Permukaan Laut dan Korelasinya dengan Suhu Laut Global Periode 1982-2024 Mubarrok, Saat; Radjawane, Ivonne Milichristi
GEOSAINS KUTAI BASIN Vol. 8 No. 2 (2025)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/aawsmt98

Abstract

Sebagai negara maritim yang terletak di antara Samudra Pasifik dan Hindia, Indonesia memegang peranan penting dalam interaksi laut-atmosfer global dan variasi iklim dunia, terutama dengan adanya dinamika dan variasi suhu permukaan laut atau sea surface temperature (SST) dalam kondisi pemanasan global. Penelitian ini bertujuan untuk melihat tren rata-rata tahunan dan bulanan dari SST lokal dan kaitannya dengan kenaikan SST global di lautan Indonesia dalam kurun waktu 1982-2024. Data yang digunakan adalah dataset reanalisis dari Optimum Interpolation SST (OISST) harian yang dirata-ratakan menjadi bulanan dan nilai tren didapatkan dari metode Sen’s slope estimator. Hasil menunjukkan bahwa rata-rata SST tahunan berkisar antara 27,5°C sampai 29,5°C dengan standar deviasi berkisar antara 0,5°C sampai 1,2°C. Tren signifikan dari kenaikan SST jangka panjang maksimum didapatkan berada di daerah utara Pulau Papua yang mencapai nilai 0,03°C/tahun. Tren yang tidak signifikan juga ditemukan di pantai selatan (barat) Pulau Jawa (Sumatra). Perbandingan antara time series SST lokal dan global menunjukkan bahwa tren SST di wilayah Indonesia memiliki amplitudo yang lebih tinggi (0,020°C/tahun) dibandingkan dengan tren global (0,018°C/tahun). Terdapat korelasi signifikan (r = 0,59; p.val < 0,001) antara tren SST Indonesia dan global, dengan korelasi tertinggi ditemukan di wilayah utara Pulau Papua dan utara Pulau Sumatra. Variabilitas SST antar-tahunan di Indonesia juga lebih tinggi dibandingkan dengan lautan global, yang menunjukkan respons regional yang lebih dinamis. Analisis tren bulanan menunjukkan peningkatan pada bulan Desember, khususnya di wilayah utara Pulau Papua dan Maluku. Studi ini menjelaskan pentingnya dinamika SST regional dan keterkaitannya dengan iklim global yang lebih luas.
Co-Authors Abdillah, Muhammad Rais Abdurrahman, Umar Akbar, M. Apdillah Badriana, Mochamad Riam Bernawis, Lamona Irmudyawati Budiono, Erica Maharani Edi Kusmanto Faizal Ade Rahmahuddin Abdullah Gandhi Napitupulu Giantara, Muhammad Ikhwan Fadilah Hassan, Mohd Azamuddin Mohd Hatmaja, Rahaden Bagas Henry Munandar Manik Hutahaean, Andreas Albertino Isdradjad Setyobudiandi Jamaluddin Jamaluddin Jeon, Chungkyun Kartadikaria, Aditya Rakhmat Kuswardani, Anastasia Rita Tisiana Dwi Larasati, Oktavira Dwi Demia Mubarrok, Saat Mughny, Grahadi Pandu Nagi, Achmad Napitupulu, Gandhi Napitupulu, Moses Nur, Ashadi Arifin Nurdjaman, Susanna Park, Hansan Pongrekun, Jeremy Nugraha Pratama, Bayu Edo Pratama, Khafid Rizki Rahmadian, Affan Fadli Rangga, Kalaka Rizqi Ayu Farihah, Rizqi Ayu Safri Burhanuddin Saleh, Ejria Yusarita, Alvi