Studying Dynamic Atmospheric Processes in Tropical Urban Environment
Tropical urban atmosphere like Singapore constantly experiences complex processes rendering changing air quality. Alterations among monsoonal and inter-monsoonal seasons affect mixing of local and transported regional emissions, forming one of the most dynamic atmospheric environments. Although interesting, it is challenging to strategise mitigation for protecting public health and sustaining our blue-sky atmosphere.
Understanding aerosol size distribution in tropical urban environment (Click on the above image to view the video)
Long-term monitoring and characterisation enable us to study major emission sources and atmospheric evolution of airborne pollutants. Harvested data and findings bridge NERI research team with government bodies to serve the public together. The analysed data have led to indicators assessing impacts of cross-border peat-forest smoke on the urban environment for early preparation. Emission sources contributing to ambient PM2.5 have been apportioned with more rapid time resolution. Cellular studies have demonstrated that reduced airborne pollutants contribute to protect human respiratory health. Through international collaboration, PM2.5 of heavy peat-forest smoke reaching Singapore in 2015 are dated as around 800-year old, an evidence of underground peat burning with significant implications on regional and global atmosphere.
Satellite image of 2013 peat forest smoke
(Source: NASA, https://earthdata.nasa.gov/labs/worldview/)
Adjusting atmospheric environment monitoring system
With desirable reduction in ambient PM2.5 concentration,
challenges of vanguard urban air quality remain. NERI
researchers will be investigating gaseous-aerosol dynamics
and influences of transported air masses in our surroundings
as part of endeavour to continually enhance air quality of our
urban atmospheric environment.
For more details, please contact:
Associate Professor Yu Liya
E-mail: liya.yu@nus.edu.sg