Journal of Earth Science & Climatic Change
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The characterizations of carbonaceous aerosols, which are composed of organic carbon (OC) and elemental carbon (EC)
particles, have been continuously investigated during the past three decades. Several concerns over its adverse impacts on
human health and climate system raised by scientists around the world reflect the importance of these carbonaceous aerosols.
Recent studies have comprehensively examined the application of OC/EC ratios as an indicator of primary and secondary organic
carbon. Despite numerous studies into the identification of OC/EC compositions in the atmospheric environment around the
world, there are limited data regarding the characterization of carbonaceous aerosols in tropical countries. Over the past few years,
more studies related to the impact of haze episode in northern part region of Thailand on air quality level have been published
in several peer reviewed international journals. Although climate conditions can play a major role in the fate of carbonaceous
aerosols, there has been no research investigating the effects of meteorological parameters on particulate OC/EC compositions
in different heights of urban atmosphere in northern part of Thailand. The main purpose of this research was to i) investigate
climate factors that are governing the fluctuation of OC/EC compositions in PM10 in various altitudes and ii) empirical estimate
the formation of SOC at different atmospheric layers of Chiang-Mai city. PM10 samples were collected every three hours for three
days at three different levels in February 25th-28th 2008.
Siwatt Pongpiachan has completed his PhD from the University of Birmingham, UK in 2006. In 2011, he was selected by United Nation Industrial
Development Organization (UNIDO) and Pollution Control Department (PCD) as a national project manager to responsible for demonstration of
Best Available Technique (BAT) and Best Environmental Practice (BEP) in fossil fuel-fired utility and industrial boilers Thailand. He is an active
international scientific advisory committee of Wessex Institute of Technology (WIT), United Kingom, responsible for air pollution session. Currently,
he has been working as director of NIDA Center for R&D in Disaster Prevention & Management since 2010.
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