Sains Malaysiana 44(10)(2015): 1521–1530
Some
Statistical Characteristic of Malaysian Wind Direction Recorded at Maximum Wind
Speed:
1999-2008
(Sebahagian
Ciri Statistik Arah Angin Malaysia yang Direkodkan pada Kelajuan Angin Maksimum:
1999-2008)
S.Z. SATARI1,2*, Y.Z. ZUBAIRI3, A.G. HUSSIN4 & S.F. HASSAN3
1Institute of Graduate
Studies, University of Malaya, 50603 Kuala Lumpur, Wilayah Persekutuan Malaysia
2Faculty of Industrial
Sciences & Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak
26300 Gambang, Kuantan, Pahang Darul Makmur, Malaysia
3Centre for Foundation
Studies in Sciences, University of Malaya,50603 Kuala
Lumpur,
Wilayah Persekutuan
Malaysia
4Faculty of Defence
Sciences and Technology, National Defence University of Malaysia, Kem Sungai
Besi, 57000 Kuala Lumpur, Wilayah Persekutuan, Malaysia
Diserahkan: 25 Julai
2013/Diterima: 30 Jun 2015
ABSTRACT
The statistical characteristics of
wind direction that was recorded at maximum wind speed in Peninsular Malaysia
for two monsoons from 1999 to 2008 for seven stations were analyzed in this
study. Modeled by von Mises distribution, the change in parameters values
namely mean direction and concentration parameter was measured. Statistical
summary, graphical representations, Watson-William Test and linear-circular
correlation are used in the analysis. It is found that there is a significant
change in the mean direction of wind over the period of ten years for most
stations in Peninsular Malaysia. However, there is a weak relationship between
wind direction and wind speed. This study suggested the presence of prominent
direction of wind that blows in Peninsular Malaysia by monsoon. This finding
may provide useful information on giving a better understanding of the behavior
of the wind in Peninsular Malaysia and the potential use of wind as an
alternative source of energy.
Keywords: Circular statistics;
climate; von Mises distribution; wind direction; wind speed
ABSTRAK
Ciri statistik arah angin yang
dicatatkan pada kelajuan angin maksimum bagi tujuh stesen di Semenanjung
Malaysia untuk dua monsun dari tahun 1999 hingga 2008 telah dianalisis dalam
kajian ini. Arah angin ini dimodelkan oleh taburan von Mises
dan perubahan dalam nilai-nilai parameternya iaitu min berarah serta parameter
menumpu telah diukur. Ringkasan statistik, perwakilan
grafik, ujian Watson-William dan korelasi linear membulat turut digunakan dalam
analisis ini. Didapati bahawa terdapat perubahan
ketara dalam min hala tuju angin sepanjang tempoh sepuluh tahun bagi kebanyakan
stesen di Semenanjung Malaysia. Walau bagaimanapun,
terdapat hubungan yang lemah antara arah angin dan kelajuan angin. Kajian ini mencadangkan terdapat kehadiran arah utama angin yang
bertiup di Semenanjung Malaysia untuk setiap monsun. Penemuan
ini boleh memberikan maklumat yang berguna serta pemahaman yang lebih baik
terhadap tingkah laku angin di Semenanjung Malaysia dan potensi penggunaan
angin sebagai sumber tenaga alternatif.
Kata
kunci: Arah angin; iklim; kelajuan angin; statistik berarah; taburan
von Mises
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*Pengarang untuk surat-menyurat; email: zanariah@ump.edu.my
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