Spatial and temporal variations of open straw burning based on fire spots in northeast China from 2013 to 2017

Cui, Song; Song, Zihan; Zhang, Leiming; Shen, Zhenxing; Hough, Rupert; Zhang, Zulin; An, Lihui; Fu, Qiang; Zhao, Yong; Jia, Zhongzhi

doi:10.1016/j.atmosenv.2020.117962

Cited by 57 publications

(29 citation statements)

References 19 publications

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“…Burning of corn residue, a C4 plant, which could account for ∼15% of the total agricultural waste burning in China, is likely high in fall (Jin et al., 2018; C. Li et al., 2016), consistent with Bayesian model results showing that the contribution of C4 plants to WSOC had significant seasonal variation, with the highest values occurring in fall (Figure ). In fact, a recent study reported that more than 80% of the open straw burning releasing atmospheric pollutants in northeast China is corn residue burning (Cui et al., 2020). The K + tracer, which is a typical tracer for biomass burning, also exhibited a better relationship with WSOC C4 plants ( r = 0.84, p < 0.01) than WSOC C3 plants ( r = 0.65, p < 0.01).…”

Section: Resultsmentioning

confidence: 99%

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM_2.5 Over China

Cheng

Zhong

et al. 2021

JGR Atmospheres

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Water-soluble organic carbon (WSOC), which can enhance the cloud condensation nuclei activity of particles and thus exert indirect aerosol climate effects, contributes approximately 20%-90% of the OC in the atmosphere (Kirillova, Andersson, Tiwari, et al., 2014;Zhang et al., 2018). However, increasing evidence indicates that a certain fraction of WSOC can also absorb solar radiation directly and efficiently, particularly at shorter wavelengths (<400 nm), and is thus a source of brown carbon (BrC) (Andreae & Gelencsér, 2006;Laskin et al., 2015). Recent studies have shown that the dominant carbonaceous light-absorbing species is elemental carbon (EC), and that solar absorption of WSOC could be comparable to the absorption of EC at ultraviolet wavelengths (Kirillova et al., 2016;Srinivas et al., 2016;Srinivas & Sarin, 2014). Therefore, the contribution to light absorption of WSOC cannot be ignored at lower wavelengths, and its presence could offset the cooling effect of OC, influence tropospheric photochemistry, and decrease ozone formation rates, especially in regions with a large amount of biomass burning (e.g.

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Section: Resultsmentioning

confidence: 99%

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM_2.5 Over China

Cheng

Zhong

et al. 2021

JGR Atmospheres

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Section: Introductionmentioning

confidence: 99%

“…Northeast China is an important grain growing area (about 19.3%) in China [25]. However, post-harvest burning of crop straw (maize straw, rice straw, wheat straw and potato straw) is commonly practiced by farmers despite its importance in compost production and livestock management [25,26]. Most farmers in the region prepare their land for the next cropping season by burning, which influences seasonal air pollution and causes hazy weather through the release of particulate matter (PM 2.5 ) and other gaseous precursors (soot, nitrogen oxides, sulfur dioxide and polycyclic aromatic hydrocarbons) [27].…”

Section: Introductionmentioning

confidence: 99%

Moisture-Induced Pattern of Gases and Physicochemical Indices in Corn Straw and Cow Manure Composting

et al. 2021

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This study investigated the altering effect of moisture on the emission pattern of gases and the evolutionary dynamics of physicochemical indices in corn straw and cow manure composting. Exploring this effect was reasonable to unravel the use of moisture as a cheap alternative to control gaseous emissions and improve the final properties of compost. The nutrient dynamics of the compost showed 21.6% losses in total organic carbon content, with a 33.3% increase in total nitrogen content at the end of composting. All the gases (CH4, CO2, N2O and NH3) yielded a common emission pattern despite the differences in moisture content. Except for CH4, the peak and stable emission periods of all the gases were observed on the 5th day (thermophilic phase) and after the 27th day (late mesophilic phase) of composting, respectively. Emission reductions of 89%, 91%, 95% and 100% were recorded for CH4, CO2, N2O and NH3, respectively, during the late mesophilic phase of composting. From the study, the 65% moisture content was efficient in reducing the loss rate of the gasses and nutrient contents of the compost. This study would enable farmers to channel organic residues generated into compost while minimizing pollution and nutrient losses associated with the composting process.

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“…It is extremely recalcitrant and long-lasting, with many contemporary problems originating from past eras [2]. Rapid economic development, accelerated urbanization and agricultural production, accompanied by a large amount of emitted pollutants, has led to a significant decline in air quality [3,4]. Most pollutants have a short time of existence in the atmosphere [5], for example, heavy metals tend to adsorb into the surface of suspended particulate matter and fall to the ground during dry and wet deposition processes.…”

Section: Introductionmentioning

confidence: 99%

Levels, Inventory, and Risk Assessment of Heavy Metals in Wetland Ecosystem, Northeast China: Implications for Snow Cover Monitoring

Zhang

Meng

Gao

et al. 2021

Water

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Snow cover is a unique environmental medium in cold regions that can cause potential risks to the ecological environment, due to the release of pollutants that are stored in it. In this study, the Qixing River wetland, located in the Sanjiang Plain of China, was taken as the target research area. Heavy metals in snow cover, including Cu, Ni, Cr, Cd, Pb, and Zn were measured at 19 sampling sites. The results showed that the average concentrations of heavy metals were: Zn (103.46 ± 39.16) > Pb (13.08 ± 4.99) > Cr (11.97 ± 2.82) > Ni (9.55 ± 4.96) > Cu (6.19 ± 1.79) > Cd (0.55 ± 0.25) μg·L−1. Cr and Zn were between Class I and Class II in the “Environmental Quality Standards for Surface Water” of China (GB3838-2002). Pb in snow exceeded the upper limit of Class II, and was significantly higher than concentrations measured in water samples from the Qixing River wetland (p < 0.05), indicating that atmospheric deposition during winter was the major source of Pb. The water pollution index (WPI) indicated that 61.0% of samples could be considered of “clean” status, while the contribution of Zn, Pb, and Cr to WPI were 33.3%, 21.0%, and 19.3%, respectively. A preliminary evaluation of heavy metal inventory in snow cover showed that the residue level of Zn was the highest (2313.57 ± 1194.67 μg·m−2), while Cd was the lowest (13.91 ± 10.45 μg·m−2). The areas with high residues of heavy metals were all located near the buffer zone of the wetland (except for Zn), where snow depth tended to be greatest. Exposure analysis indicated that the risks to winter resident birds from snow ingestion was minimal, but it should be noted that the exposure risk was higher in birds with lower bodyweights. This study provides important information and scientific knowledge on the pollution characteristics and residue inventory of heavy metals in wetland ecosystems, while the results can also provide a monitoring method, reflecting atmospheric environmental quality at a local or regional scale.

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Spatial and temporal variations of open straw burning based on fire spots in northeast China from 2013 to 2017

Cited by 57 publications

References 19 publications

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM_2.5 Over China

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM_2.5 Over China

Moisture-Induced Pattern of Gases and Physicochemical Indices in Corn Straw and Cow Manure Composting

Levels, Inventory, and Risk Assessment of Heavy Metals in Wetland Ecosystem, Northeast China: Implications for Snow Cover Monitoring

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Spatial and temporal variations of open straw burning based on fire spots in northeast China from 2013 to 2017

Cited by 57 publications

References 19 publications

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM2.5 Over China

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM2.5 Over China

Moisture-Induced Pattern of Gases and Physicochemical Indices in Corn Straw and Cow Manure Composting

Levels, Inventory, and Risk Assessment of Heavy Metals in Wetland Ecosystem, Northeast China: Implications for Snow Cover Monitoring

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Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM_2.5 Over China

Dual Carbon Isotope‐Based Source Apportionment and Light Absorption Properties of Water‐Soluble Organic Carbon in PM_2.5 Over China