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Isoprene Emission from Forest Ecosystem in China

Author: ZhangLi
Tutor: ZuoQiLong；WangXiaoKe；OuYangZhiYun
School: Nanjing Institute of Meteorology
Course: Meteorology
Keywords: Isoprene Potential for emissions Observation Estimates Distribution Characteristics
CLC: X831
Type: Master's thesis
Year: 2002
Downloads: 133
Quote: 0
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Abstract


Increasing photochemical smog and tropospheric ozone concentrations have been a direct threat to the survival of the human environment . One of the important precursors for the formation of photochemical smog and ozone - non - methane hydrocarbons (NMHC) emissions by the earnest attention of the researchers . Isoprene ( isoprene ) ( the C 5 < / sub> the H - 8 < / sub > ) in the troposphere important NMHC vegetation release most of the volatile organic compound ( VOC ) emissions accounted for half of the total emissions of the plant hydrocarbons content is high, especially in rural and remote areas in the atmospheric boundary layer , often on Local atmospheric environment, such as ozone concentration has a great influence . In this thesis, the system summarizes isoprene emissions of research at home and abroad on the basis of , the use of the closed sampling methods and gas chromatography with photoionization detector (PID, Photo-ionization detector) , 65 dominant species in the Yangtze Delta isoprene emissions were observed to obtain the 40 species of emission of isoprene emission potential , bamboo , for example for Estimating isoprene emissions Guenther equation verified . Combined with previous observations and national forest resources survey , using Guenther equation estimate to get the nation's major forest dominant tree species isoprene emissions 0.03-8.6Tg/yr , and the upper limit about the world 's total annual emissions of 1.5 ~ 4.3% , and analyze the temporal and spatial distribution of forest ecosystems in China isoprene emissions , which will further understand the changes in the atmospheric environment , mode simulation of a variety of air pollution effects and to develop more effective measures to reduce emissions , reduce tropospheric ozone damage ecosystems and human living environment , provide a scientific basis .

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Environmental monitoring > Atmospheric monitoring
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