基于MODIS影像内蒙古草地火排放污染物动态研究

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Abstract A self-designed biomass combustion system was used to measure the emission factors of grassland burning based on the MODIS image data of Inner Mongolia zone and the temporal and spatial patterns of pollutants emitted from burning of grassland from 2000 to 2017 were analyzed. The results showed that the average emission factors of CO₂, CO, NO_x, C_xH_y, PM_2.5, TC, OC and EC from the burning of Phragmites communis, Setaria viridis, Pennisetum alopecuroides and Calamagrostis epigeiosare were 1402.6~1550.1, 140.3~253.8, 0.67~1.55, 21.5~93.7, 3.74~6.89, 1.66~3.06, 1.42~2.71, 0.23~0.44g/kg, respectively. Inner Mongolia grassland biomass density had uneven spatial and temporal distribution and the distribution of biomass density had gradually decreasing from northeast to southwest. The total biomass burnt was 8061.46kt, and the total amounts of the emitted CO₂, CO, NO_x, C_xH_y, PM_2.5, TC, OC and EC were 11296.13 kt, 1609.79 kt, 10.80 kt, 408.96 kt, 44.50 kt, 20.06 kt, 17.23 kt and 2.83 kt, respectively. A total of 49,374 grassland fires had occurred, with the fire points and fire areas were unbalanced in time and space. The monthly variation exhibited a bi-modal distribution, the main-peak fire point (March) was significantly higher than the secondary-peak fire point (September), and the distribution of fire density and fire area had a gradually decreasing trend from northeast to southwest.

Key words： Inner Mongolia grassland fire emission factors pollutants temporal and spatial patterns

Received: 06 August 2018

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	Articles by authors
	JIN Quan-feng
	HUANG Hai-song
	SHEN Pei-fu
	CHEN Bing-hong
	CHAI Hong-ling
	GUO Fu-tao

Cite this article:

JIN Quan-feng,HUANG Hai-song,SHEN Pei-fu等. Dynamic changes of pollutants emission from grassland fires based on MODIS images in Inner Mongolia[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 1154-1163.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I3/1154

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