Climate Projections of Future Extreme Events in Malaysia

Abstract

In Malaysia, extreme rainfall events are often linked to a number of environmental disasters such as landslides, monsoonal and flash floods. In response to the negative impacts of such disaster, studies assessing the changes and projections of extreme rainfall are vital in order to gather climate change information for better management of hydrological processes. This study investigates the changes and projections of extreme rainfall over Peninsular Malaysia for the period 2081-2100 based on the RCP 6.0 scenario. In particular, this study adopted the statistical downscaling method which enables high resolution, such as hourly data, to be used for the input. Short duration and high intensity convective rainfall is a normal feature of tropical rainfall especially in the western part of the peninsular. The proposed method, the Advanced Weather Generator model is constructed based on thirty years of hourly rainfall data from forty stations. To account for uncertainties, an ensemble multi-model of five General Circulation Model realizations is chosen to generate projections of extreme rainfall for the period 2081-2100. Results of the study indicate a possible increase in future extreme events for both the hourly and 24 h extreme rainfall with the latter showing a wider spatial distribution of increase.

Impacts of and adaptation to climate change on the oil palm in Malaysia: a systematic review

“…Rainfall is anticipated to increase by ~20 to 40% during summer across the Southeast Asia region, as portrayed by the Intergovernmental Panel on Climate Change (IPCC) Special Report on Emission Scenarios (SRES A2, A1B and B2) (Loh et al 2016 ). Syafrina et al ( 2017 ) projected increase in hourly duration and intensity of rainfall for the period 2081–2100 with spatio-temporal variation in the distribution within the Peninsular Malaysia based on the Representative Concentration Pathway (RCP 6.0) scenario.…”

The Impacts of Fishermen’s Resilience towards Climate Change on Their Well-Being

“…NAHRIM [6], on the other hand, forecasted a substantial increase (11 to 43%) in mean monthly rainfall over the area of the east coast of Peninsular Malaysia, while Moyawa et al [7], who conducted a study on 54 stations along the east coast region of Peninsular Malaysia, reported that the heavy rainfall in the studied areas increased by 1.5 days per decade over the time period from 1971 to 2010. Regarding extreme events in Malaysia, Billa et al [8] reported an increase of rainfall intensities during monsoon, which is the major cause for heavy flood and landslide, and this, according to Syafrina et al [9], will be worsened in the future. Extreme events in Malaysia risk human life and damage properties.…”

The Practical Influence of Climate Change on the Performance of Road Stormwater Drainage Infrastructure

“…A short-term (less than six hours) flash flood resulting from a substantive rainstorm can rapidly raise the water level in rivers and streams. Substantive rainfall incidences in Malaysia are often connected to ecological catastrophe-like flash flooding during monsoon seasons and landslides [15][16][17]. e extent of interactions of differing road networks and other aspects can be assessed to gauge the effect of flooding.…”