DETEKSI ES DAN HAIL DI ATMOSFER DENGAN RADAR POLARIMETRIK X-BAND FURUNO WR-2100 (STUDI KASUS: 24 JANUARI DAN 14 FEBRUARI 2016)
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Abstract
Informasi keberadaan es di atmosfer sangat penting, tidak hanya untuk studi meteorologi, namun juga untuk kegiatan modifikasi cuaca maupun pengembangan sistem peringatan dini bencana hidrometeorologi. Pada makalah ini, kami mendemonstrasikan tiga teknik deteksi es dengan memanfaatkan observasi radar X-band polarimetrik Furuno WR-2100. Data Constant Altitude Plan Position Indicator (CAPPI) untuk parameter horizontal reflectivity (Zh), differential reflectivity (ZDR) dan specific differential phase (KDP) pada kejadian presipitasi konvektif di wilayah Banten dan Bogor tanggal 24 Januari dan 14 Februari 2016 dianalisis dengan menggunakan metode Hail Differential Reflectivity (HDR), metode konsistensi KDP (CM) dan metode fuzzy logic (FL). Produk data yang dihasilkan oleh ketiga metode tersebut saling dibandingkan secara horizontal pada ketinggian 500 meter, 2 kilometer dan 5 kilometer, serta secara vertikal hingga ketinggian 15 kilometer. Hasil analisis menunjukkan metode HDR paling sensitif dan konsisten untuk identifikasi es pada setiap level ketinggian, sedangkan metode FL dapat membedakan jenis es secara spesifik. Di sisi lain, rendahnya sensitivitas metode CM dalam penelitian ini menunjukkan tidak adanya konsentrasi es yang signifikan pada waktu observasi dan mengindikasikan metode tersebut lebih sensitif untuk deteksi jenis es dengan ukuran yang lebih besar.
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