Haze event monitoring and investigation in Penang Island, Malaysia using a ground-based backscatter Lidar

7th IGRSM International Remote Sensing & GIS Conference and Exhibition

地球科学;计算机科学

Hee, W.S.^1 ; Tan, F.^1 ; Lim, H.S.^1 ; Matjafri, M.Z.^1

School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia^1

关键词: Aerosol distribution;    Aerosol optical depths;    Air pollution index;    Backscatter lidar;    Daytime variation;    Event monitoring;    Ground based;    Planetary boundary layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/20/1/012060/pdf
DOI  :  10.1088/1755-1315/20/1/012060

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

During 24thJuly 2013 to 1st August 2013, a haze event struck Penang Island, causing the visibility to decrease and increase in Air Pollution Index (API). A ground-based backscatter Lidar, operate at 355 nm which was setup at the roof top of the School of Physics, Universiti Sains Malaysia. It was used to monitor and investigate the haze event. For this work, we studied the daytime variation of the aerosol intensity, distribution, planetary boundary layer (PBL) height and the aerosol optical depth (AOD) values during these days. We found that the aerosol are very intense during the first two days of the haze event and slowly decline as time passed. Finally the haze event died off on 1stAugust 2013. As for daily aerosol distribution, aerosols are generally more intense during the afternoon. Its intensity is slightly lower in the morning and evening. Similar trends were observed for AOD values as they increase from morning to afternoon and slowly decrease in the evening. Most aerosols are found contained below the PBL which generally found at around 1000-2000 m in height.