草业学报2017，Vol.26Issue(2)：21-29,9.DOI:10.11686/cyxb2016337
2005-2014年内蒙古草地火灾排放污染物的时空格局
Temporal and spatial patterns of emissions and pollutants from grassland burned in Inner Mongolia during 2005-2014
摘要
Abstract
Fire is an important disturbance in ecosystems,and fires significantly affect the atmospheric environment and human health.Combining MODIS satellite data for the Inner Mongolia region during 2005-2014 and data from the Animal Husbandry Statistical Yearbook,we estimated the burnt biomass of regional grassland.The total emissions and spatial and temporal distribution of pollutants from grassland fires during 2005-2014 were also explored using emission factor,kernel density,and kriging interpolation methods.The results indicated that the density of burned grassland biomass differed within Inner Mongolia,decreasing from the northeast to the southwest parts of Inner Mongolia.The grassland fires were distributed unevenly,both spatially and temporally,in the study area.The grassland fires showed a stable annual growth and mainly occurred in March-April and September-October every year,showing two distinct peaks.Spatially,the distribution of fire point density gradually decreased from the northeast to the southwest parts of the study area.The proportions of total grassland fires in the various regions of Inner Mongolia were as follows:Hulun Buir (48.1％),Xing'an League (7.4 ％),Tongliao (2.8 ％),Chifeng (1.9 ％),Xilinguole (8.3 ％),Wulanchabu (3.8 ％),Baotou (4.3％),Hohhot (1.2％),Bayanzuoer (1.0％),Erdos (20.6％),Wuhai (0.3％),and Alashan (0.3％).During the period of 2005-2014,the total emissions of various substances were as follows:CO2 (658.31 kt),CO (39.09 kt),NOx (846.18 t),CH4(1.22 kt),volatile organic compounds (1.87 kt),particulate matter smaller than 2.5 μm (2.49 kt),organic carbon (1.65 kt),and elemental carbon (197.96 t).The emission of each type of pollutant varied spatially and temporally and was significantly correlated with the density distribution of fires.In this study,we explored the spatial and temporal dynamic changes in pollutants emitted from grassland fires in Inner Mongolia.This information will underpin further research on this regional environment by providing a robust database.关键词
内蒙古/草地火/污染物/时空分布Key words
Inner Mongolia/grassland fire/pollutants/temporal and spatial distribution引用本文复制引用
靳全锋,鞠园华,杨夏捷,王文辉,郭福涛..2005-2014年内蒙古草地火灾排放污染物的时空格局[J].草业学报,2017,26(2):21-29,9.基金项目
国家自然科学基金(31400552),福建农林大学杰出青年基金项目(xjq201613),福建省自然科学基金(2015J05049)和福建省教育厅省属高校专项(JK2014012)资助. （31400552）
