ANALISIS CUACA PADA SAAT PELAKSANAAN PENYEMAIAN AWAN DI WADUK PLTA KOTA PANJANG BULAN APRIL - MEI 2013
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Abstract
ABSTRAK
Telah dilakukan analisis cuaca selama pelaksanaan TMC pada bulan April dan Mei 2013 di Waduk PLTA Kota Panjang. Temperatur permukaan laut di daerah Nino 3.4 menunjukkan ENSO netral dengan temperatur rata-rata pada bulan April dan Mei 2013 antara 27.6 s.d 27.7 oC serta nilai anomaly antara -0.03 s.d -0.1 oC. Penjalaran MJO aktif yang menunjukkan terjadinya peningkatan aktifitas konvektif di wilayah Sumatra terjadi pada awal April dan akhir Mei 2013. Arah angin pada level gradient bertiup dari barat daya – barat laut dengan kecepaan 5-15 knot. Siklon Tropis Mahasen di utara Sumatera yang terjadi pada pertengahan bulan Mei berpengaruh terhadap berkurangnya hujan di daerah target. Kecepatan angin yang cukup tinggi di level 700-600 mb pada awal kegiatan mengakibatkan pertumbuhan awan di daerah target tidak berkembang dengan optimal. Dalam kondisi kelembaban rendah masih dijumpai pembentukan awan orografik di sepanjang pegunungan Bukit Barisan bagian barat DAS Waduk PLTA Kota Panjang.
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