2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

Emissions of Biogenic Volatile Organic Compounds in a Regional Cropping System

Return to Session

Ms. Mengfan Cai, Concordia University (Presenter)
Dr. Chunjiang An, Concordia University

Biogenic volatile organic compounds (BVOCs) emitted from vegetation participate in many atmospheric reactions that can contribute to the formation of carbon dioxide, ozone, secondary organic aerosol (SOA) and particulate matter (PM). That will have impact on not only air quality but also  climate change. Previous studies mainly focused on BVOCs emissions of forests at local and global scales, while few concentrated on the contribution of crops to BVOCs emission. Some aspects in the estimation of BVOC emission from crops , including emission rates of different crop species still remain unclear. This study aimed to evaluate the regional BVOCs emissions of main crops. The data of crop volume, production and distribution were collected and then converted into leaf biomass. An emission model was developed with the assistance of biogenic emission inventory system. Some meteorological parameters such as hourly data of ambient temperature, relative humidity, wind speed and cloud cover were used to investigate leaf temperature and photosynthetically available radiation (PAR). The annual BVOC emission of crops in the study area was assessed. It was found the emissions varied significantly among crop species.  The results of temporal   change showed that the emission of BVOCs in summer contributed the most to the total emission amount all year round. This study provided a new method for the assessment of BVOCs emissions from crops. The results can be used to develop appropriate strategy for regional emission management.