Affiliations: College of Environmental Sciences, Peking University,
Beijing 100871, China | Journal of Peking University, Peking University,
Beijing 100871, China
Abstract: The first detailed inventory for volatile organic compounds (VOC)
emissions from vegetation over Yunnan Province, China was presented. The
spatially and temporally resolved inventory was developed based on a geographic
information system (GIS), remote sensing (RS) data and field measurement data,
such as digitized land-use data, normalized difference vegetation index (NDVl)
and temperature data from direct real-time measurement. The inventory has a
spatial resolution of 5 km × 5 km and a time resolution of 1 h. Urban,
agriculture, and natural land-use distributions in Yunnan Province were
combined with biomass factors for each land-use category to produce a spatially
resolved biomass inventory. A biogenic emission inventory was developed by
combining the biomass inventory with hourly emission rates for tree, shrub and
ground cover species of the study area. Correcting for environmental factors,
including light intensity and temperature, a value of 1.1 ×
10^{12} gC for total annual biogenic VOC emissions from
Yunnan Province, including 6.1 × 10^{11} gCfor
isoprene, 2.1 × 10^{11} gC for monoterpenes, and 2.6
× 10^{11} gC for OVOC was obtained. The highest VOC
emissions occurred in the northwestern, southwestern and north region of Yunnan
Province. Some uncertainties were also discussed in this study.
Keywords: biogenic VOC, isoprene, monoterpene, emissions inventory, Yunnan Province
