%0 Journal Article
%T Spatial and temporal variability of open biomass burning in Northeast China from 2003 to 2017
%A Guoqing WENG
%A Huiqin MAO
%A Lili WANG
%A Qinglu WANG
%A Qiyang LIU
%A Xin JIN
%A Yuesi WANG
%J Atmospheric and Oceanic Science Letters
%D 2020
%R https://doi.org/10.1080/16742834.2020.1742574
%X ABSTRACT Open biomass burning (OBB) has a significant impact on the heavy haze pollution in Northeast China (NEC) in recent years, which requires the investigation of the spatiotemporal variations of OBB with different vegetation types to better monitor and control OBB in NEC. The MODIS C6 fire and land cover products, together with the emissions inventory from the Global Fire Assimilation System, were used in this study. The changes in the total number of MODIS fire points in NEC from 2003 to 2017 demonstrated a fluctuating but generally rising trend, with a peak during 2013每2017. Most fire points concentrated in two key periods, i.e. March每April (37%) and October每November (46%). The total number of crop residue burnings in March每April was basically slightly fluctuating and increased sharply from 2013, whilst the number in October每November had a fluctuating and upward trend until 2015, when a decline appeared. The amount of OBB in March每April was higher than that in October每November during 2016每17. OBB in Heilongjiang Province comprised a major proportion of all fires, which accounted for 70.7% from 2003 to 2017; however, the proportion was only 66.2% during 2013每2017. The largest proportion of all fires was in cropland (90.8%), then forest (5.3%) and grassland (3.1%). The cumulative emissions of fine particulate matter, nitrogen oxides, and ammonia from agricultural open burning in NEC reached 78.43 Gg, 24.9 Gg, and 13.7 Gg for March每April during 2013每17, respectively, which were close to those in October每November. Graphical abstrac
%U https://www.tandfonline.com/doi/full/10.1080/16742834.2020.1742574