Continuous Haze Monitoring in Sumatra

Laboratory experiments on haze originated from wildfires

Including Singapore, many countries in Southeast Asia are experiencing haze originated from wildfires. Those haze plumes have significant adverse effects on regional environments such as human health and visibility. We are trying to understand atmospheric chemistry and physics of the haze.

Wildfire in this region is very unique in the world. During wildfire events, tropical peat, which mostly exists in Southeast Asian countries, serves as a fuel in addition to vegetation such as trees and weeds. Chemical composition of gas and aerosol particles emitted from peat smoldering has not been characterized well yet, and chemical reactions of those compounds are remained as unknown. Physical and chemical properties of those particles such as hygroscopic growth have also not been investigated.

Burned peat forest

 We burn tropical peat samples to investigate emission, chemical processing in the atmosphere, and hygroscopic growth. The experimental data will be eventually compared with field observation data to obtain comprehensive understanding on atmospheric chemistry of haze from wildfire.

 Tropical peat samples



Funding Sources: 

  • Earth Observatory of Singapore

Project Years: 


EOS Team: 

Principal Investigator



Osamu Kozan and Masayuki Itoh, Centre for Southeast Asian Studies, Kyoto University

Motonori Okumura, Graduate School of Agriculture, Kyoto University

Fuu-Ming Kai, Centre for Environmental Sensing and Modelling, Singapore-MIT Alliance for Research and Technology (SMART)