Climatology

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https://repoemc.ukm.my/handle/123456789/59

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Now showing 1 - 20 of 35

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Asymmetric boundary shifts of tropical montane Lepidoptera over four decades of climate warming
(Wiley, 2011) I-Ching Chen; Jane K. Hill; Hau-Jie Shiu; Jeremy D. Holloway,Suzan Benedick; Vun Khen Chey; Henry S. Barlow; Chris D. Thomas
To estimate whether species have shifted at equal rates at their leading edges (cool boundaries) and trailing edges (warm boundaries) in response to climate change. We provide the first such evidence for tropical insects, here examining elevation shifts for the upper and lower boundaries shifts of montane moths. Threats to species on tropical mountains are considered.
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Techniques to implement in green data centres to achieve energy efficiency and reduce global warming effects
(Inderscience Enterprises Ltd, 2011) Mueen Uddin; Azizah Abdul Rahman
Energy demand in data centre industry is growing rapidly as computing technology changes and Information Technology (IT) professionals seek to maximise performance of data centres. A multitude of methods have been used to estimate and quantify energy intensity. Rising energy costs, continuing concerns about global economic downturn and global warming effects has leaded ways for energy efficient data centres. The goal of computer system design has been shifted to power and energy efficiency. This paper highlights strategies and techniques that provide energy savings in data centre like reducing frequent hardware purchases, power/cooling cost reductions, green metrics, shrinking data storage, workload consolidation and reducing physical servers.
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Climate change simulations in terms of solar radiation and cloud fraction based on PRECIS over Malaysia region
(UMS, 2013) Steven S.K. Kong; Justin Sentian
This paper simulated the solar radiation and total cloud fraction for Malaysia by the end of the 21st century based on the A2 and the B2 scenarios by utilizing the latest generation of the Hadley Centre regional climate modeling system, PRECIS (Providing Regional Climates for Impact Studies).
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Unjuran Perubahan Iklim Ekstrim Masa Depan di Malaysia
(Penerbit UKM, 2013) Meng Sei Kwan; Fredolin T. Tangang; Liew Juneng
Mitigating and adapting to the impacts of climate change at regional level require downscaled projection of future climate states. This paper examined the possible changes of future climate extremes over Malaysia based on the IPCC SRES A1B emission scenario. The projected changes at 17 stations were produced by bias correcting the UKMO PRECIS downscaling simulation output. The simulation expected higher probability of rainfall extreme occurrences over the west coast of Peninsular Malaysia during the autumn transitional monsoon period. In addition, possible early monsoon rainfall was projected for certain stations located over East Malaysia. The simulation also projected larger increase of warm temperature extremes but smaller decrease of cold extremes, suggesting asymmetric expansion of the temperature distribution. The impact of the elevated green house gases (GHG) is higher in the night time temperature extremes as compared to the day time temperature extremes. The larger increment of warm night frequencies as compared to the warm day suggests smaller diurnal temperature ranges under the influence of higher greenhouse gases. Stations located in East Malaysia were projected to experience the largest increase of warm night occurrence.
Open Access
Investigation of Flood Pattern Using ANOVA Statistic and Remote Sensing in Malaysia
(IOP Publishing, 2014) Norsuzila Ya’acob; Nor Syazwani Ismail; Norfazira Mustafa; Azita Laily Yusof
This project will be focus on flood causes by monsoon. For the last few years, the number of extreme flood was occurred and brings great economic impact. The extreme weather pattern is the main sector contributes for this phenomenon.
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Suitability of ANN applied as a hydrological model coupled with statistical downscaling model: a case study in the northern area of Peninsular Malaysia
(Springer, 2015) Zulkarnain Hassan; Supiah Shamsudin; Sobri Harun; Marlinda Abdul Malek; Nuramidah Hamidon
The increase in global surface temperature in response to the changing composition of the atmosphere will significantly impact upon local hydrological regimes and water resources. This situation will then lead to the need for an assessment of regional climate change impacts. The objectives of this study are to determine current and future climate change scenarios using statistical downscaling model (SDSM) and to assess climate change impact on river runoff using artificial neural network (ANN) and identification of unit hydrographs and component flows from rainfall, evaporation and streamflow data (IHACRES) models, respectively.
Open Access
Mapping of post-event earthquake induced landslides in Sg. Mesilou using LiDAR
(IOP Publishing, 2016) Habibah Hanan Mat Yusoff; Khamarrul Azahari Razak; Florence Yuen; Afifi Harun; Jasmi Talib; Zakaria Mohamad; Zamri Ramli; Razain Abd Razab
This study aims at providing a better insight into the use of advanced LiDAR mapping technology for recognizing landslide induced by earthquakes particularly in a vegetated terrain, assessing post event hazard and analyzing its distribution for hazard zonation. We developed the landslide inventory using LiDAR-derived visual analysis method and validated in the field. A landslide inventory map improved with the support of LiDAR derivative data. Finally, landslide inventory was analysed by emphasizing its distribution and density in such a way that it provides clues of risky zone as a result of debris flow.
Open Access
Conceptualization of a Collaborative Decision Making for Flood Disaster Management
(IOP Publishing, 2016) Siti Nur Aishah Zubir; Sivadass Thiruchelvam; Kamal Nasharuddin Mustapha; Zakaria Che Muda; Azrul Ghazali; Hazlinda Hakimie; Normy Norfiza Abdul Razak; Abdul Aziz Mat Isa; Hasril Hasini; Khairul Salleh Mohamed Sahari; Norhayati Mat Husin; Mohd Ezanee Rusli; Rahsidi Sabri Muda; Lariyah Mohd Sidek; Hidayah Basri; Izawati Tukiman
Flooding is the utmost major natural hazard in Malaysia in terms of populations affected, frequency, area extent, flood duration and social economic damage. The recent flood devastation towards the end of 2014 witnessed almost 250,000 people being displaced from eight states in Peninsular Malaysia. The affected victims required evacuation within a short period of time to the designated evacuation centres. An effective and efficient flood disaster management would assure non-futile efforts for life-saving. Effective flood disaster management requires collective and cooperative emergency teamwork from various government agencies. Intergovernmental collaborations among government agencies at different levels have become part of flood disaster management due to the need for sharing resources and coordinating efforts. Collaborative decision making during disaster is an integral element in providing prompt and effective response for evacuating the victims.
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Mengenal Pasti Tren Berekanada di dalam Parameter Perubahan Iklim di Kluang dan Senai, Johor, Malaysia
(Penerbit UKM, 2017) Firdaus Mohamad Hamzah; Farahani Mohd Saimi; Othman Jaafar
Perubahan iklim memainkan peranan yang penting pada masa kini berikutan kesan serius terhadap kehidupan di bumi. Analisis tren perubahan iklim amat penting dalam mengenal pasti perubahan coraknya kerana analisis ini dapat memberi gambaran awal dalam membuat analisis lanjutan. Dalam kajian ini, analisis tren dilakukan untuk melihat perubahan iklim bagi parameter perubahan iklim, iaitu jumlah jatuhan hujan bulanan (mm), purata suhu bulanan (°C), purata radiasi global bulanan (MJm-2), purata kelajuan angin bulanan (m/s) serta purata kelembapan bulanan (%) sepanjang tempoh 1974 sehingga 2010.
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Future climate change impact assessment of watershed scale hydrologic processes in Peninsular Malaysia by a regional climate model coupled with a physically-based hydrology modelo
(Elsevier, 2017) M.Z.M. Amin; A.J. Shaaban; A. Ercan; K. Ishida; M.L. Kavvas; Z.Q. Chen; S. Jang
Impacts of climate change on the hydrologic processes under future climate change conditions were assessed over Muda and Dungun watersheds of Peninsular Malaysia by means of a coupled regional climate and physically-based hydrology model utilizing an ensemble of future climate change projections. An ensemble of 15 different future climate realizations from coarse resolution global climate models' (GCMs) projections for the 21st century was dynamically downscaled to 6 km resolution over Peninsular Malaysia by a regional climate model, which was then coupled with the watershed hydrology model WEHY through the atmospheric boundary layer over Muda and Dungun watersheds.
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Discovering meaningful patterns for tropical climate change in Malaysia
(Inderscience Enterprises Ltd, 2018) Ghassan Saleh Al-Dharhani; Zulaiha Ali Othman; Azuraliza Abu Bakar; Sharifah Mastura Syed Abdullah
This paper investigated patterns of climate change in Malaysia and proposed a fuzzy based symbolic data representation known as a shapelet patterns algorithm (SPA). The Shapelet Pattern visualise climate change patterns in the form of coloured shapes to indicate annual changes in temperature patterns. The experiment used climate change data collected from four stations in Malaysia, Petaling-jaya, Subang, KLIA-Sepang and University Malaya, to produce three types of results.
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Trend analysis and change point detection of annual and seasonal temperature series in Peninsular Malaysia
(Springer, 2018) Jamaludin Suhaila; Zulkifli Yusop
This study proposes to investigate the trends, and change point detection of mean, maximum and minimum temperature series, both annually and seasonally in Peninsular Malaysia and determine the possible factors that could contribute to the significance trends. In this study, Pettitt and sequential Mann–Kendall (SQ–MK) tests were used to examine the occurrence of any abrupt climate changes in the independent series.
Open Access
Projections on Future Impact and Vulnerability of Climate Change Towards Rubber Areas in Peninsular Malaysia
(IOP Publishing, 2018) Mohd Hafiz Mohd Hazir; Radhiah Abdul Kadir; Yahya Abd Karim
The outline of this paper is to analyze and assess the future impact and vulnerability of climate change towards rubber in Peninsular Malaysia based on three prominent features, which are increase in temperature (drought), rainfall (flood) and sea level rise.
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Climate change in Malaysia: Trends, contributors, impacts, mitigation and adaptations
(Elsevier, 2019) Kuok Ho Daniel Tang
This paper reviews the past and future trends of climate change in Malaysia, the major contributors of greenhouse gases and the impacts of climate change to Malaysia. It also reviews the mitigation and adaptations undertaken, and future strategies to manage the impacts of regional climate change.
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Observed trends in extreme temperature over the Klang Valley, Malaysia
(Springer, 2019) Ahmad Norazhar Mohd YATIM; Mohd Talib LATIF; Fatimah AHAMAD; Md Firoz KHAN; Mohd Shahrul Mohd NADZIR; Liew JUNENG
This study investigates the recent extreme temperature trends across 19 stations in the Klang Valley, Malaysia, over the period 2006–16. Fourteen extreme index trends were analyzed using the Mann-Kendall non-parametric test, with Sen’s slope as a magnitude estimator.
Open Access
Urbanization and it impacts to land surface temperature on small medium size city for year 1991, 2011 and 2018: Case study Kota Kinabalu
(UMS, 2020) Ricky Anak Kemarau; Oliver Valentine Eboy
Transformation of land cover vegetation toward urban areas causes the temperature at urban higher to compare to suburban and rural areas, namely urban heat island (UHI) effect. The UHI has a negative impact, such a stroke heat, air pollution, green gasses emission, and electric consumption. UHI studies at a tropical country still limited due to the containment of cloud cover. Besides that, studies only focus on big cities which have residents above than 2 million. The outcome this studied important to enhance our knowledge of urban heat effect at small-medium cities and guidelines to policymaker and urban planner to discover there has effectively taken to decrease the effect of urban heat at the hot spot area. The main goal of this research about to discovered influence of urban growth and selected urban index, namely the Normalized Difference Built Index (NDBI) to LST.
Open Access
Flood Hazard Risk Matrix for Urbanization Control Area of Flood Plain
(IOP Publishing, 2020) Mohd Fisham Bin Abu Basah; Faizah Che Ros; Samira Albati Kamaruddin; Mohd Shukri Madnor
Identification and understanding the potential flood risk area are important elements in disaster risk reduction through development planning control plan. The development growth in Merlimau area causes demand for new urbanization area for residential, commercial and public infrastructure. Therefore, the risk of flood should evaluate to identify the possible future flood hazard-risk area based on future land use in Merlimau.This paper describes an approach to produce flood hazard and risk matrix and map using a combination of flood numerical modelling and Geographical Information System (GIS) analysis in Merlimau River Basin.
Open Access
Designing Early Warning Flood Detection and Monitoring System via IoT
(IOP Publishing, 2020) MI. Hadi; F. Yakub; A. Fakhrurradzi; CX. Hui; A. Najiha; NA. Fakharulrazi; AN. Harun; ZA. Rahim; A. Azizan
Flooding is one of the biggest natural disasters that occurs frequently around the world. It can occur without warning and the after effect of it leaves great damage to the surrounding environment and exposes life threatening to citizen. Therefore, early flood detection and monitoring system with the implementation of Internet of Things and Global Positioning System is proposed in order to reduce the risks that may cause flooding. The aim of this project is to provide the information of a current water level in a drain.
Open Access
Flood Analysis and Non-Structural Approach for Flood Protection in Sg. Kelantan
(IOP Publishing, 2022) Nurul Fatihah Nor Azlan Shah; Nur Wajihah Abd Hakim; Md Noor Salleh; Maisarah Ali; Mohd Fairullazi Ayob; Thayalam Sekaran; Mohd Azmi Ismail; Mohd Zaki Mat Amin
The objectives of this paper were to simulate Flood Hydrographs for Various Storm Duration by using Hydrologic Engineering Centre-Hydrologic Modelling System (HEC-HMS), to investigate the location of floodplain at the catchment area of Sg. Kelantan by using River Analysis System (HEC-RAS), to identify the non-structural approach that can reduce the rate of flood based on its topography.
Open Access
Application of Analytical Hierarchy Process (AHP) for Landslide Hazard Analysis (LHA) in Kota Kinabalu Area, Sabah, Malaysia
(IOP Publishing, 2022) Rodeano Roslee; Kamilia Sharir; Goh Thian Lai; Norbert Simon; Lee Khai Ern; Eldawaty Madran; Ahmad Syazwan Saidin
The AHP is defined as theory of measurement through pairwise comparisons and relies on the judgements of experts to derive priority scales that measure intangibles in relative terms. The derived priority scales are synthesised by multiplying them by the priority of their parent nodes and adding for all such nodes. Weighted value of different spatial factors from the best models calculated with the AHP method were derived.