Impacts of post-harvest open biomass burning and burning ban policy on severe haze in the Northeastern China

Yang, Guangyi; Zhao, Hongmei; Tong, Daniel; Xiu, Aijun; Zhang, Xuelei; Gao, Chao

doi:10.1016/j.scitotenv.2020.136517

Cited by 58 publications

(35 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strong correspondence with ASTER (mean R 2 = 0.92) suggested that the hybrid approach could be used to monitor and quantify fire activities in cropland areas. Yang et al estimated the open biomass burning emission by using the Visible Infrared Imaging Radiometer Suite (VIIRS) sensors capable of detecting more fires, particularly in relatively smaller areas [26]. Spectral characteristics of the ground surface change before and after CRB.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variation patterns and aggregation of crop residue burning at county scale in Northeast China

Wang

Guo

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Crop residue burning (CRB) has been a major environmental concern in key agricultural regions of China. To reveal spatiotemporal patterns of CRB events, a county-level assessment in Northeast China was conducted using Moderate Resolution Imaging Spectroradiometer (MODIS) thermal anomalies and land cover data. The results revealed that cropland fire occurrence increased significantly from 2003 to 2019, and annual CRB occurrence from 2014 to 2019 was significantly higher than that from 2003 to 2013. The majority of detected CRB events occurred in spring and autumn, accounting for 58.50% and 28.98% of the total cropland fires, respectively. The time scan statistics showed that CRB events lasted for approximately 40 days each year and were more severe in spring than autumn. The number of cropland fires monitored by Terra and Aqua satellites was relatively more balanced, accounting for 49.74% and 50.26% of the total, respectively, indicating that farmers may intentionally burn crop residue at night. The counties with higher CRB intensity were mainly in the Songnen Plain, Sanjiang Plain, and along the main stream of the Liaohe River. The Moran’s I value of 0.054 to 0.452 for CRB intensity demonstrated a strong spatial autocorrelation at the county level. The local autocorrelation Getis-Ord G i * showed 86 counties with significant hot spots and 91 counties with significant cold spots. The county-level temporal and spatial patterns of CRB events may be the results of policies and socio-economic conditions. This study could provide support for identifying the influencing factors of CRB and offer suggestions for crop residue management practices in this agriculture-dominant region.

show abstract

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variation patterns and aggregation of crop residue burning at county scale in Northeast China

Wang

Guo

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…The open-air incineration of sugarcane leaves induces signi cant di culties in regional air pollution reduction particularly the urban atmospheric pollution control. It has been reported that the incineration of agricultural straw posed signi cant effects on air quality, public health and climate in China [17][18][19] . In northern China, pollution due to the straw incinerations usually take place in autumn 20 , for instance, the open BB contributed 52.7% of atmospheric PM 2.5 in Northeast region of China during November 1-4, 2015.…”

Section: Resultsmentioning

confidence: 99%

Cause Analysis of PM2.5 pollution during the COVID-19 lockdown in Nanning, China

Huang

Chen

Zhou

et al. 2021

Preprint

View full text Add to dashboard Cite

To analyze the cause of atmospheric PM2.5 pollution occurred during the COVID-19 lockdown in Nanning of Guangxi, China, Single Particulate Aerosol Mass Spectrometer, Aethalometer, Particulate Lidar, coupled with the monitoring of near-surface gaseous pollutants, meteorological conditions, remote fire spots sensing by satellite and Backward Trajectory Models were conducted during 18–24, Feb 2020. Three haze stages of pre-pollution period (PPP), pollution accumulation period (PAP) and pollution dissipation period (PDP) were identified. The dominant source of PM2.5 in PPP was biomass burning (BB) (40.4%), followed by secondary inorganics (28.1%) and motor vehicle exhaust (11.7%). The PAP was characterized by a large abundance of secondary inorganics, which contributed for 56.1% of the total PM2.5 concentration, followed by BB (17.4%). The absorption Ångström exponent (2.2) in PPP was higher than those of the other two periods. The analysis of fire spots monitored by remote satellite sensing indicated that open BB in regions around Nanning city could be one of the main facotrs matters. The planetary boundary layer-relative humidity-secondary particles matter-particulate matter positive feedback mechanism was employed to elucidate the atompheric process in this study. This study highlights the importance of understanding the role of BB and meteorology in air pollution formation to call for policy for emission control strategies.

show abstract

“…Furthermore, the crop residue was usually burned directly by farmers to ensure the next spring tillage, which made a large number of air pollutants released into the atmosphere [24,25]. The phenomenon of OBB in HC is very common and has been investigated by many studies [11,22,23,[26][27][28][29][30]. Because of the unique geographical, climate, and anthropogenic characteristics, it is very meaningful to study the composition of air pollutants in HC [31,32].…”

Section: Introductionmentioning

confidence: 99%

Air Quality in the Harbin-Changchun Metropolitan Area in Northeast China: Unique Episodes and New Trends

Wang

Sun

Zhao

et al. 2021

Toxics

View full text Add to dashboard Cite

Because of the unique geographical, climate, and anthropogenic emission characteristics, it is meaningful to explore the air pollution in the Harbin-Changchun (HC) metropolitan area. In this study, the Air Quality Index (AQI) and the corresponding major pollutant were investigated for the HC cities, based on the air quality data derived from the China National Environmental Monitoring Center. The number of days with the air quality level of “good” gradually increased during recent years, pointing to an improvement of the air quality in HC. It was also found that ozone, a typical secondary pollutant, exhibited stronger inter-city correlations compared to typical primary pollutants such as carbon monoxide and nitrogen dioxide. In addition, for nearly all the HC cities, the concentrations of fine particulate matter (PM2.5) decreased substantially in 2020 compared to 2015. However, this was not the case for ozone, with the most significant increase of ozone observed for HC’s central city, Harbin. This study highlights the importance of ozone reduction for further improving HC’s air quality, and the importance of agricultural fire control for eliminating heavily-polluted and even off-the-charts PM2.5 episodes.

show abstract

Impacts of post-harvest open biomass burning and burning ban policy on severe haze in the Northeastern China

Cited by 58 publications

References 51 publications

Spatiotemporal variation patterns and aggregation of crop residue burning at county scale in Northeast China

Spatiotemporal variation patterns and aggregation of crop residue burning at county scale in Northeast China

Cause Analysis of PM2.5 pollution during the COVID-19 lockdown in Nanning, China

Air Quality in the Harbin-Changchun Metropolitan Area in Northeast China: Unique Episodes and New Trends

Contact Info

Product

Resources

About