Browsing by Author "Helmi Zuhaidi Mohd Shafri"

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    Evaluation of aerosol optical thickness over Malaysia based on multi-score ground and satellite data
    (Universiti Pertanian Malaysia Press, 2019) Khaled Ali Ahmed Ben Youssef; Ahmad Makmom Abdullah; Helmi Zuhaidi Mohd Shafri; Zulfa Hanan Ash'aari
    This study evaluates the spatiotemporal distribution of aerosol optical thickness (AOT) over Malaysia. The significance of aerosols in regional and global climate change assessment has become a pressing topic in recent climate discussions. Two different approaches are used in measuring AOT; satellite imagery and ground measurement approaches.However, the satellite approach is deemed the best way for monitoring the patterns and transport of aerosols largely due to its extensive spatial coverage and reliable repetitive measurements. The data in this study were obtained from a Sea-viewing Wide Field-of-view Sensor (SeaWiFS), a Multi-angle Imaging Spectroradiometer (MISR), and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite sensors based on a NASA-operated Giovanni portal. Ground-based Aerosol Robotic Network (AERONET) datasets from two sites over the study area were also used.