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Estimation of emissions from field burning of crop straw in China

机译：中国农作物秸秆田间燃烧的排放量估算

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Emissions resulting from crop straw field burning in China, which have caused serious environmental problems in China, are estimated in this paper. From the county-level data of crop production in 2000-2003 from the government statistics, taking into account the ratio of residue and grain, the total amount of crop straw production is estimated to be about 600 Tg per year, 76% of which are rice, wheat and corn straw. With reference to the data of living standards, the percentage of crop straw burnt in fields for counties are obtained and consequently the total amount of burnt straws is approximately 140 Tg/year. With the emission factors from literature and experiments, appropriate emission factors have been obtained. The total amounts of PM, SO2, NO (x) , NH3, CH4, BC, OC, VOC, CO, CO2 emissions from field burning of crop straw in China are estimated. All emissions are presented at county level. Some pollutants, such as BC, VOC, OC, CO and CO2, are contributing a major portion to the total emissions of China. This paper uses a map with resolution of 0.2 degrees x 0.2 degrees to present the PM emissions distribution from crop straw burnt in 2003. The results show a significant regional unevenness of emissions, with larger amounts of pollutions coming from the provinces in eastern and northeast China. The regions with higher emissions per unit area are located as a belt stretching from northeast China to eastern China.
机译：本文估算了中国秸秆焚烧引起的排放，这些排放在中国造成了严重的环境问题。根据政府统计的2000-2003年县级农作物产量数据，考虑到残渣和谷物的比例，估计每年农作物秸秆的总产量约为600 Tg，其中76％为大米，小麦和玉米秸秆。根据生活水平的数据，获得了各县田间焚烧农作物秸秆的百分比，因此，每年焚烧秸秆的总量约为140 Tg。利用文献和实验的排放因子，已经获得了合适的排放因子。估算了中国秸秆田间焚烧产生的PM，SO2，NO（x），NH3，CH4，BC，OC，VOC，CO，CO2的总量。所有排放均在县一级列出。某些污染物，如BC，VOC，OC，CO和CO2，占中国总排放量的很大一部分。本文使用分辨率为0.2度x 0.2度的地图来表示2003年农作物秸秆焚烧产生的PM排放分布。结果表明，该地区的排放存在显着的不均匀性，而东部和东北部的省份则污染较大。单位面积排放量较高的地区位于从东北到华东的一条带上。

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