Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/138361
Title: IMPACTS OF TROPICAL TRANSBOUNDARY BIOMASS BURNING SMOKE ON URBAN AEROSOLS IN SINGAPORE
Authors: JIA SHIGUO
Keywords: Transboundary, Biomass burning, Southeast Asia, Aerosol
Issue Date: 30-Apr-2015
Citation: JIA SHIGUO (2015-04-30). IMPACTS OF TROPICAL TRANSBOUNDARY BIOMASS BURNING SMOKE ON URBAN AEROSOLS IN SINGAPORE. ScholarBank@NUS Repository.
Abstract: TO UNDERSTAND HOW THE BIOMASS BURNING SMOKE IN THE SOUTHEAST ASIA AFFECT URBAN AIR QUALITY, A LONG-TERM SAMPLING PLAN WAS CARRIED OUT DURING 2011-2013. BY COUPLING BACKWARD TRAJECTORY, HOTSPOTS, AND CHARACTERISTICS OF CHEMICAL COMPOSITION, URBAN AEROSOL SAMPLES WERE CLASSIFIED INTO THREE CATEGORIES: NON-SMOKE DOMINANT, SMOKE DOMINANT, AND EPISODIC EVENTS. RESULTS SHOW THAT THE CLASSIFICATION APPROACH IS A USEFUL TOOL TO DISCERN IMPACTS OF THE TRANSBOUNDARY SMOKE ON URBAN AEROSOLS EVEN IF THE PM2.5 CONCENTRATION DOES NOT INCREASE SIGNIFICANTLY. CHEMICAL COMPOSITION OF PM2.5 SHOWS THAT ON AVERAGE, THE TRANSOBUNDARY SMOKE INCREASED THE OC CONCENTRATION BY A FACTOR OF > 3. THE SUBSTANTIAL INCREASE IN AMMONIUM AND SODIUM IN PM2.5 INTERESTINGLY NEUTRALIZE ACIDIC URBAN AEROSOLS. A THERMAL METHOD IS DEVELOPED TO DIFFERENTIATE OXALATE SALT AS THERMAL SENSITIVE VS. INSENSITIVE GROUPS. RESULTS SHOW THAT MORE THAN 90% OF OXALATE SALTS ARE THERMAL SENSITIVE, INDICATING THAT THEY ARE MAINLY AM
URI: http://scholarbank.nus.edu.sg/handle/10635/138361
Appears in Collections:Ph.D Theses (Open)

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