ANALISIS KEJADIAN ANGIN KENCANG DI DESA SITUGEDE BOGOR BARAT TANGGAL 28 MARET 2017

Juniarto Widodo

Abstract


Penelitian ini mengkaji angin ekstrim yang terjadi di wilayah desa Situ Gede Bogor Barat pada 28 Maret 2017. Jenis data yang diperlukan untuk interpretasi dalam analisis cuaca lokal dan fenomena atmosfer skala regional dan global, antara lain suhu permukaan laut, medan angin, MJO, OLR, labilitas udara dan penginderaan jauh. Metodologi penelitian ini adalah menggunakan analisis deskriptif dari semua pengamatan data yang ada. Hal penting analisis adalah digunakannya data citra radar dari Tangerang Integrated Radar. Melalui analisis ini, menunjukkan hubungan yang signifikan antara kondisi cuaca lokal dan dukungan data lainnya seperti anomali suhu permukaan laut di wilayah utara pulau Jawa yang diamati lebih hangat dan menunjukkan meningkatnya intensitas evaporasi. Hasil lainnya, analisis model medan angin pada 925 HPa, terjadinya sirkulasi siklon di Barat Daya Provinsi Banten, gradien suhu sebesar 3,7 °C telah mengindikasikan penguapan pemanasan aktif, Indeks Pengangkatan (Li ) sebesar -2 yang berpotensi terjadi badai petir. Dari analisis imajiner radar menunjukkan bahwa pertumbuhan awan konvektif Cb yang matang pada pukul 12:45 WIB hingga pukul 14:29 WIB berpotensi hujan deras diikuti angin kencang. Curah hujan tercatat 35 mm dan angin kencang 48 knot dari Barat. Kesimpulan penelitian, dengan memadukan semua data parameter pengamatan dan data citra dari radar, dan menunjukkan korelasi yang kuat terhadap pasokan massa udara yang berpotensi mempengaruhi terjadinya angin kencang dan konvergensi di sekitar Jawa bagian Barat, yaitu di desa Situgede pada 28 Maret 2017 pukul 14:29 WIB.

Keywords


angin ekstrim, labilitas udara, putaran siklon, medan angin, citra radar

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DOI: http://dx.doi.org/10.24895/SNG.2018.3-0.1039

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