DefinePK

Abstract

The peat land wildfire in Indonesia was periodically occurs even in non-ENSO period thus may pose health risk to the inhabitants each year. During non episodic peat land wildfire, we measured PM2.5 using 2 sets of PM2.5 samplers combined with secondary data from fixed monitoring station for ambient PM10. We compare the data with previous study on episodic wildfire in this peat land area. EC and OC concentrations in PM2.5 were determined using a thermal/optical carbon analyzer with IMPROVE-A protocol. The pattern of PM10 during episodic peat land wildfire can reach more than ten times of PM10 standard (24 h). This is may pose health risk since this high concentration may persist during one month or more. While during non episodic wildfire the ambient PM10 showed moderate fluctuation. During episodic burning period, the ambient atmosphere are enriched by OC1 and OC2 fraction, while in non episodic burning, fraction of OC2, OC3 as well as OC4 shows higher level than OC1. Based on EC ratio analysis the char-EC in biomass burning shows higher than soot-EC leading to dominant fraction of low temperature elemental carbon originated from biomass burning.