Abstract
The inconsistency in inter-seasonal rainfall due to climate change will cause a different pattern in the rainfall characteristics and distribution. Peninsular Malaysia is not an exception for this inconsistency, in which it is resulting extreme events such as flood and water scarcity. This study evaluates the seasonal patterns in rainfall indices such as total amount of rainfall, the frequency of wet days, rainfall intensity, extreme frequency, and extreme intensity in Peninsular Malaysia. 40 years (1975-2015) data records have been interpolated using Inverse Distance Weighted method. The results show that the formation of rainfall characteristics are significance during the Northeast monsoon (NEM), as compared to Southwest monsoon (SWM). Also, there is a high rainfall intensity and frequency related to extreme over eastern coasts of Peninsula during the NEM season.
Highlights
Evaluation of rainfall behaviour has drawn an attention throughout the world [1]
This study evaluates the seasonal patterns in rainfall indices such as total amount of rainfall, the frequency of wet days, rainfall intensity, extreme frequency, and extreme intensity in Peninsular Malaysia. 40 years (19752015) data records have been interpolated using Inverse Distance Weighted method
The results show that the formation of rainfall characteristics are significance during the Northeast monsoon (NEM), as compared to Southwest monsoon (SWM)
Summary
Evaluation of rainfall behaviour has drawn an attention throughout the world [1]. The relationship between rainfall and climate has become an intensive study nowadays since the climate change is likely to cause changing the magnitudes, frequencies, and intensities of rainfall as well its seasonal variability and distributions [2,3]. Many recent studies have evaluated historical rainfall and rainfall-related extremes in Malaysia such as Deni et al [5]; Suhaila et al [1]; Mayowa et al [3]; and Syafrina et al [6]. All these studies are analysed rainfall pattern and trend over Peninsular Malaysia based on only a few stations. The data is not up-to-date and limited to some stations, which do not reflect the current pattern of rainfall characteristics over the Peninsula
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