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Physical and Optical Characteristics of the October 2010 Haze Event Over Singapore: A Photometric and Lidar AnalysisTrans-boundary biomass burning smoke episodes have increased dramatically during the past 20-30 years and have become an annual phenomenon in the South‐East‐Asia region. On 15th October 2010, elevated levels of fire activity were detected by remote sensing satellites (e.g. MODIS). On the same date, measurements of fine particulate matter (PM2.5) at Singapore and Malaysia found high levels of fine mode particles in the local environment. All these observations were indicative of the initial onset of a smoke episode that lasted for several days. In this work, we investigate the temporal evolution of this smoke episode by analyzing the physical and optical properties of smoke particles with the aid of an AERONET Sun photometer, an MPLNet micropulse lidar, and surface PM2.5 measurements. Elevated levels of fire activity coupled with high aerosol optical depth and PM2.5 were observed over a period of nine days. Increased variability of parameters such as aerosol optical depth, Angstrom exponent number and its fine mode equivalents all indicated high levels of fine particulate presence in the atmosphere. Smoke particle growth due to aging, coagulation and condensation mechanisms was detected during the afternoons and over several days. Retrieved lidar ratios were compatible with the presence of fine particulate within the boundary/aerosol layer. Moreover, retrieved particle size distribution as well as single scattering albedo indicated the prevalence of the fine mode particulate regime as well as particles showing enhanced levels of absorption respectively.
Document ID
20140013248
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Salinas, Santo V.
(National Univ. of Singapore Singapore)
Chew, Boon Ning
(National Univ. of Singapore Singapore)
Miettinen, Jukka
(National Univ. of Singapore Singapore)
Campbell, James R.
(Sigma Space Corp. Lanham, MD, United States)
Welton, Ellsworth J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Reid, Jeffrey S.
(Naval Research Lab. Monterey, CA, United States)
Yu, Liya E.
(National Univ. of Singapore Singapore)
Liew, Soo Chin
(National Univ. of Singapore Singapore)
Date Acquired
October 29, 2014
Publication Date
March 1, 2013
Publication Information
Publication: Atmospheric Research
Publisher: Elsevier
Volume: 122
ISSN: 0169-8095
Subject Category
Earth Resources And Remote Sensing
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN11785
ISSN: 0169-8095
Report Number: GSFC-E-DAA-TN11785
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Air quality
AERONET
Aerosols
MPLNET
South East Asia
Haze
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