PENGARUH ANGIN TERHADAP PERTUMBUHAN AWAN HUJAN DI DAS WADUK PLTA KOTA PANJANG
Article Sidebar
Main Article Content
Abstract
Abstrak
Telah dianalisis hubungan antara pembentukan awan hujan dengan kecepatan angin di Waduk PLTA Kota Panjang. Penelitian ini menggunakan data angin dan kelembaban udara dari NCEP reanalysis, data angin hasil pengukuran dengan pilot balon, pengamatan awan dengan pesawat terbang serta data hujan dari penakar hujan terpasang serta data hujan TRMM. Hasil analisis menunjukkan kejadian hujan sangat terkait dengan besarnya kecepatan angin di lapisan atas. Kejadian tidak ada hujan pada tanggal 12 – 19 April 2013 berhubungan dengan tingginya kecepatan angin pada lapisan 700 – 600 mb yang merncapai 40 knot serta kelembaban udara kurang dari 60%. Angin kencanag terkait dengan adanya pusat tekanan rendah di Samudra Hindia di sebelah barat Sumatera Barat. Sebaliknya pada tanggal 20 – 30 April 2013, ketika kecepatan angin jauh berkurang hingga di bawah 5 knot, terjadi peningkatan curah hujan di DAS Waduk PLTA Kota Panjang. Agin kencang pada lapisan 700 – 600 mb mengakibatkan pertumbuhan awan terganggu sehingga sulit membentuk awan hujan. Awan yang terbentuk umumnya berupa awan Stratocumulus dan Stratus yang tidak berpotensi hujan.
Article Details
Authors who publish with this journal agree to the following terms:
a). Authors retain copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
b). Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
c). Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
d). Each author must sign the copyright transfer statement. The article will not be published unless this form has been signed and received.
OPEN ACCESS POLICY
Jurnal Sains & Teknologi Modifikasi Cuaca provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.
JSTMC by BBTMC-BPPT is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Permissions beyond the scope of this license may be available at http://ejurnal.bppt.go.id/index.php/JSTMC
References
Aldrian, E., Dumenil Gates, L., & Widodo, F. H., 2007: Seasonal variability of indonesian rainfall in ECHAM4 simulations and in the reanalyses: The role of ENSO. Theoretical and Applied Climatology, 87(1-4), 41-59.
Aldrian, E., and R. D. Susanto, 2003: Identification of three dominant rainfall regions within Indonesia and their relationship to sea surface temperature. Int. J. Climatol, 23, 1435-1452.
Hendon, H. H., 2003: Indonesian rainfall variability: Impacts of ENSO and local air-sea interaction. Journal of Climate, 16(11), 1775-1790.
McBride, J., 1987: The Australian summer monsoon. Monsoon Meteorology, C.-P. Chang and T. N. Krishnamurti, Eds., Oxford University Press, 203-231.
Ramage, C. S., 1968: Role of a tropical "maritime continent" in the atmospheric circulation. Mon. Wea. Rev., 96.
Qian, J., Robertson, A. W., & Moron, V., 2010: Interactions among ENSO, the monsoon, and diurnal cycle in rainfall variability over java, indonesia. Journal of the Atmospheric Sciences, 67(11), 35093524.
Qian, J., 2008: Why precipitation is mostly concentrated over islands in the maritime continent. Journal of the Atmospheric Sciences, 65(4), 1428-1441.