A BIOGENIC HYDROCARBON EMISSION INVENTORY FOR THE USA USING A SIMPLE FOREST CANOPY MODEL

被引:204
作者
LAMB, B [1 ]
GAY, D [1 ]
WESTBERG, H [1 ]
PIERCE, T [1 ]
机构
[1] NOAA,AIR RESOURCES LAB,DIV ATMOSPHER SCI MODELING,SILVER SPRING,MD 20910
来源
ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS | 1993年 / 27卷 / 11期
关键词
BIOGENIC HYDROCARBONS; EMISSION INVENTORY; ISOPRENE; ALPHA-PINENE; FOREST CANOPY;
D O I
10.1016/0960-1686(93)90230-V
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A biogenic hydrocarbon emission inventory system, developed for acid deposition and regional oxidant modeling, is described, and results for a U.S. emission inventory are presented. For deciduous and coniferous forests, scaling relationships are used to account for canopy effects upon solar radiation, temperature, humidity and wind speed as a function of height through the canopy. Leaf temperature is calculated iteratively from a leaf energy balance as a function of height through the canopy. The predicted light and temperature levels are used with mean empirical emission rate factors and laboratory emission algorithms to predict hydrocarbon emission rates. For application to a U.S. inventory, diurnal emission fluxes of isoprene, alpha-pinene, other monoterpenes and other hydrocarbons are predicted for eight land cover classes by state climatic division by month. The total U.S. emissions range from 22 to 50 Tg yr-1 depending upon the formulation of different emission rate factors. In the case where the forest canopy model is not used, the isoprene emissions increase by 50% and terpene emissions increase by 6%. In case study analyses, the predicted leaf temperatures were within 1-2-degrees-C of observed for a deciduous forest, and predicted emissions were within a factor of two of observations. Further evaluation of the inventory using field measurements is required to determine the overall accuracy of the emission estimates.
引用
收藏
页码:1673 / 1690
页数:18
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