ReKOD ALAM : Repositori Data EMC
Pengumpulan data penyelidikan alam sekitar dan perubahan iklim serta dasar dan polisi berkaitan
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Recent Submissions
Relationships between Air Pollutants and Meteorological Factors during Southwest and Northeast Monsoon at Urban Areas in Peninsular Malaysia
(IOP Publishing Ltd, 2024) Norazrin Ramli; Mahiesha Rubini; Norazian Mohamed Noor
This study examines the link between meteorological parameters (ambient temperature, relative humidity, and wind speed) and daily air pollutant concentrations in four monitoring stations at Peninsular Malaysian cities (Seberang Perai, Pasir Gudang, Batu Muda, and Kemaman) during southwest and northeast monsoon. Pearson Correlation Analysis analyzed air quality data over two years (January 2016 - January 2018).
Risk assessment for extreme air pollution events using vine copula
(Springer, 2024) Mohd Sabri Ismail; Nurulkamal Masseran
This study proposes an alternative risk assessment approach for evaluating extreme air pollution events through vine copula modeling. Three characteristics of unhealthy air pollution events (i.e., severity, intensity, and duration) in Klang, Malaysia, are examined.
Acute effects of air pollution on cardiovascular hospital admissions in the port district of Klang, Malaysia: A time-series analysis
(Elsevier, 2024) N.N. Abd Rahim; R. Ahmad Zaki; A. Yahya; W.R. Wan Mahiyuddin
In this study, the acute impacts of air pollution, especially from shipping emissions, on cardiovascular hospital admissions in Klang, Malaysia, a notable port district, are explored. Time-series analysis and Quasi-Poisson regressions, combined with distributed lag non-linear models, were employed to examine the relationships between daily levels of pollutants and hospital admissions for cardiovascular issues. Focus was placed on the pollutants NO2 (nitrogen dioxide), SO2 (sulphur dioxide), O3 (ozone), particulate matters with diameters ?10 ?m (PM10), particulate matters with diameters ?2.5 ?m (PM2.5), and CO (carbon monoxide), with consideration of lag effects up to 7 days. An increment of 10 ?g/m3 in NO2 concentrations was associated with a 7.32% increase in cardiovascular admissions on the exposure day, with statistically significant elevations in relative risks at lag 0 were observed for admissions among patients with ischaemic heart disease, those aged less than 65 years, and male patients.
Assessment of Heavy Metal Contamination in Paddy Field Soils: A Case Study in Ranau Valley, Sabah, Malaysia
(E3S Web of Ccnference, 2025-01-10) Siti Norliyana; Nadrah Ahmad Damanhuri
The weathering of ultrabasic rocks surrounding the Ranau Valley in Sabah, Malaysia, contributes to the formation of soils with elevated concentrations of heavy metals. These metals, including Manganese (Mn), Nickel (Ni), Chromium (Cr), and others, have the potential to disperse into nearby paddy fields, leading to significant soil contamination. This study aims to: (a) determine the concentrations of heavy metals in the paddy field soils of Ranau Valley and (b) map their spatial distribution using Geographic Information System (GIS) technology. The results revealed that Mn was the most abundant metal, with concentrations reaching 13,855.67 mg/kg, followed by Iron (Fe), Ni, Zinc (Zn), and Cr. Several metals, including Mn, Ni, and Cr, exceeded established soil toxicity thresholds, particularly in areas influenced by ultrabasic rocks and agricultural practices. Elevated levels of Copper (Cu), Lead (Pb), Zn, and Cadmium (Cd) were also observed in regions affected by the use of chemical fertilizers. These findings highlight the potential risks to agricultural productivity and food safety in the region, as metals such as cadmium and lead can accumulate in crops, posing health risks to local populations. To address these concerns, remediation strategies such as organic amendments and pH adjustments are recommended. Regular monitoring and sustainable soil management practices will be essential to safeguard soil health, ensure food security, and reduce environmental risks in the Ranau Valley.
Covid-19 Effect on Community Mobility and Stock Market of Malaysia
(Asian Journal of Accounting and Governance, 2022-08-14) Wee Hin Boo; Norhafizah Abu Hasan; Wong Wai Yan
Physical distancing is believed to contain the spread of COVID-19 virus. With data provided by COVID-19 Community Mobility Reports from Google, this study examines the mobility patterns at different stages of Movement Control Order (MCO) and investigates whether lower mobility reduces the number of new cases, death cases, and recovery rate. This research also covers the time spent in places such as i) retail and recreation, ii) grocery and pharmacy, iii) parks, iv) transit stations, v) the workplace, and vi) residential areas. As each of these types of places has distinct epidemiological characteristics, they may spread transmission differently. This study also correlates the stock market with mobility patterns of Malaysians in order to evaluate the effectiveness of lockdowns on COVID-19 incidents and its impact on the stock market, in this case; Kuala Lumpur Composite Index (KLCI). Findings of this study highlight the effects of pandemic COVID-19 on stock market daily performance by utilizing prospect and uncertainty theory in predicting the short-term impacts of the epidemic