ANALISIS ANGIN KENCANG DARI AWAN CUMULONIMBUS DENGAN WRF-ARW: STUDI KASUS DAERAH ISTIMEWA YOGYAKARTA FEBRUARI 2020

Authors

  • Heri Ismanto BMKG
  • Hayu Nur Mahron Stasiun Meteorologi Tanjung Pandan
  • Edwin Fedinandus Penalun
  • fitriani fitriani

Keywords:

angin kencang, WRF

Abstract

Fenomena angin kencang menjelang hujan merupakan fenomena yang dominan saat cuaca buruk di wilayah indonesia. Awan cumulonimbus pada fase matang menampung sejumlah uap air, air hingga es dalam jumlah besar akibat proses konveksi. Limit kemampuan maksimal menahan mengakibatkan dorongan kebawah yang sangat kuat sebagai respon gaya grafitasi. Gusty (hembusan) akibat downdraft ini menghasilkan angin kencang hingga ekstrem sebelum/bersamaan dengan presipitasi  keluar dari badan awan cumulonimbus. Kejadian ekstrem angin kencang tanggal 14 Februari 2020 disimulasikan menggunakan weather research forecast (WRF). Angin permukaan 10 meter dan angin lapisan ketinggian 950 mb menunjukkan nilai 10-14 knots dan 10 hingga 18 knots. Terdapat sinyal reflektivitas tinggi keluaran WRF yang bersesuaian dengan lokasi kejadian angin kencang, yang bersesuai juga dengan pola siklonal angin.   Indeks labilitas Konvektif Indeks (KI) tidak dapat menggambar lokasi pasti kejadian lokasi potensi angin kencang.

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Published

2023-12-01

How to Cite

Ismanto, H., Nur Mahron, H., Fedinandus Penalun, E., & fitriani, fitriani. (2023). ANALISIS ANGIN KENCANG DARI AWAN CUMULONIMBUS DENGAN WRF-ARW: STUDI KASUS DAERAH ISTIMEWA YOGYAKARTA FEBRUARI 2020. Buletin Meteorologi, Klimatologi Dan Geofisika, 3(6), 20–34. Retrieved from https://balai2bmkg.id/index.php/buletin_mkg/article/view/71