Open AccessBiogenic Isoprene Emissions and Temporal and Spatial Distribution Characteristics in Tianjin
Author(s) -
Jing Li,
Maohui Liu,
Jiahong Liu,
Yayun Yue,
Sun Meng
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/450/1/012009
Subject(s) - isoprene , environmental science , noon , atmospheric sciences , spatial distribution , emission inventory , air quality index , meteorology , geography , remote sensing , chemistry , geology , organic chemistry , copolymer , polymer
Based on the localized improved GLOBEIS model, the total amount of biogenic isoprene emissions in Tianjin in 2018 was estimated and the temporal and spatial distribution characteristics were analysed by using the land-use type data interpreted from remote sensing images and the observed hourly meteorological data. The results show that the total amount of biogenic isoprene emission in Tianjin reached 694 t (calculated by C, the same below) in 2018, and the emission intensity was 0.06 t/km 2 /a. The diurnal, monthly and seasonal variations of biogenic isoprene emissions are obvious: High at noon and low at night; Highest in August and lowest in January; Emissions in summer are the largest while the smallest in winter. The spatial characteristics are closely related to land-use types, and the emissions of biogenic isoprene are mainly concentrated in the forest areas, and the emissions are small in the Urban districts of the city and Binhai New District. Finally, the uncertainty sources of biogenic isoprene emission estimation were analysed.