{
    "success": true,
    "data": {
        "id": 1754136,
        "msgid": "from-30-years-of-data-scientists-uncover-the-behaviour-of-the-south-java-coastal-current-1779542815",
        "date": "2026-05-21 11:29:00",
        "title": "From 30 Years of Data, Scientists Uncover the Behaviour of the South Java Coastal Current",
        "author": "Gloria Setyvani Putri",
        "source": "KOMPAS",
        "tags": "",
        "topic": "Social Policy",
        "summary": "A 30-year study by BRIN's Climate and Atmospheric Research Centre and the Artificial Intelligence and Cyber Security Research Centre, in collaboration with Padjadjaran University's Department of Marine Science, reconstructs the dynamics of the South Java Coastal Current (SJCC). The research shows SJCC strength and reach are modulated by global climate phenomena such as the Indian Ocean Dipole and ENSO, with 2023 representing an extreme case of simultaneous positive IOD and El Ni\u00f1o causing notable suppression of SJCC and a Sea Level Anomaly of around -16 to -17 cm off southern Java. Findings have important implications for regional climate prediction, heat transfer, and coastal fisheries management.",
        "content": "<p>The Climate and Atmospheric Research Centre, together with the\nArtificial Intelligence and Cyber Security Research Centre of the\nNational Research and Innovation Agency (BRIN), in collaboration with\nthe Department of Marine Science at Padjadjaran University (UNPAD), have\ncarried out a comprehensive reconstruction of the dynamics of the South\nJava Coastal Current (SJCC).<\/p>\n<p>The long-term study, which observed data from 1993 to 2023, maps how\nglobal climate phenomena influence the circulation of the sea current,\nwhich acts as a driver of weather and maritime wealth in Indonesia\u2019s\nsouthern region.<\/p>\n<p>For information, the SJCC is a surface current that predominantly\nflows eastward along the coast from western Sumatra to the southern\ncoast of Java and Sumba Island.<\/p>\n<p>This current carries warm water masses from the tropical Indian\nOcean, playing a crucial role in regulating rainfall patterns, sea\nsurface temperature, and the productivity of fisheries in the area.<\/p>\n<p>\u201cGenerally, the surface current flowing eastward forms year-round. On\nintraseasonal scales, the SJCC shows a dominant periodicity cycle of\nabout 76 days. However, its strength and extent change drastically when\ninteracting with global climate phenomena such as the Indian Ocean\nDipole (IOD) and El Ni\u00f1o-Southern Oscillation (ENSO),\u201d said Yosef on\nMonday, 18 May 2026, quoted from BRIN\u2019s site.<\/p>\n<p>The study reveals that under normal conditions from June to September\n(the southeast monsoon), the eastward-flowing surface current forms\nmainly along the southern coast of Java.<\/p>\n<p>This occurs due to pressure from the South Equatorial Current whose\nintensity is increasing. The mass of water from the SJCC during the\nsoutheast monsoon is indicated to originate from the Java Sea entering\nthrough the Sunda Strait.<\/p>\n<p>However, the story is different when the Negative IOD (as in 2016) or\nLa Ni\u00f1a (as in 2010) occurs. In those conditions, the SJCC strengthens\nmassively along the southern Java coast, triggered by the weakening of\nthe southeast monsoon and the increasing intensity of equatorial Kelvin\nwaves.<\/p>\n<p>Conversely, during October to January, when Positive IOD (as in 2019)\nand El Ni\u00f1o (as in 2015) occur, the SJCC current weakens significantly\nor is even suppressed.<\/p>\n<p>Specifically, the study highlights 2023 as an extreme period where\nPositive IOD and El Ni\u00f1o occurred simultaneously.<\/p>\n<p>\u201cBoth phenomena occurring together lead to suppression or weakening\nof the SJCC current very strongly from September to December 2023. This\ncondition was accompanied by a drastic drop in sea level height or Sea\nLevel Anomaly reaching around -16 cm to -17 cm off the south coast of\nJava,\u201d Yosef explained.<\/p>\n<p>Through long-term data analysis of 30 years, the researchers\nconcluded that the influence of the IOD phenomenon has a much stronger\nand more direct impact on SJCC variability than the ENSO phenomena (El\nNi\u00f1o\/La Ni\u00f1a).<\/p>\n<p>\u201cA deep understanding of the reconstruction of the SJCC current is\nnot merely an academic exercise. It is a crucial instrument for\nIndonesia to improve the accuracy of regional circulation predictions,\nheat transfer, and local climate variability,\u201d added Yosef.<\/p>\n<p>For the real sector, this BRIN-UNPAD collaboration provides a\nscientifically valuable basis to strengthen global climate modelling,\ndevelop strategies for adapting to climate change in coastal areas, and\nsupport the national catch fisheries management sector.<\/p>\n<p>This is because the SJCC current dynamics are closely related to the\nupwelling phenomenon (the stirring or rise of seawater from the depths\nto the surface). This upwelling brings nutrients and other nutrients to\nthe surface, making it a hub for high-value fisheries commodities relied\nupon by Indonesian fishers.<\/p>",
        "url": "https:\/\/jawawa.id\/newsitem\/from-30-years-of-data-scientists-uncover-the-behaviour-of-the-south-java-coastal-current-1779542815",
        "image": ""
    },
    "sponsor": "Okusi Associates",
    "sponsor_url": "https:\/\/okusiassociates.com"
}