Strong biomass burning contribution to ambient aerosol during heating season in a megacity in Northeast China: Effectiveness of agricultural fire bans?

被引：39

作者：

Cheng, Yuan ^{[1
]}

Yu, Qin-qin ^{[1
]}

Liu, Jiu-meng ^{[1
]}

Du, Zhen-Yu ^{[2
]}

Liang, Lin-lin ^{[3
,4
]}

Geng, Guan-nan ^{[5
]}

Zheng, Bo ^{[6
]}

Ma, Wan-li ^{[1
]}

Qi, Hong ^{[1
]}

Zhang, Qiang ^{[7
]}

He, Ke-bin ^{[5
]}

机构：

[1] Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin, Peoples R China

[2] Minist Ecol & Environm, Natl Res Ctr Environm Anal & Measurement, Environm Dev Ctr, Beijing, Peoples R China

[3] Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China

[4] Chinese Acad Meteorol Sci, CMA Key Lab Atmospher Chem, Beijing, Peoples R China

[5] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing, Peoples R China

[6] UVSQ, CEA, CNRS, UMR8212,Lab Sci Climat & Environm, Gif Sur Yvette, France

[7] Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2021年 / 754卷

基金：

中国国家自然科学基金;

关键词：

Biomass burning; Organic aerosol; Black carbon; Carbon monoxide; Organic tracer; Agricultural fires; IN-SITU MEASUREMENTS; ORGANIC AEROSOL; CROP RESIDUE; TRACE GASES; CARBONACEOUS AEROSOLS; REGIONAL INFLUENCE; OPTICAL-PROPERTIES; SYNOPTIC WEATHER; EVOLUTION; EMISSIONS;

D O I：

10.1016/j.scitotenv.2020.142144

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sustainable use of crop residues remains a challenge in main agricultural regions of China such as the Northeast Plain. Here we investigated the impacts of biomass burning on fine particle (PM2.5) during a six-month long heating season in the Harbin-Changchun (HC) metropolitan area, China's only national-level city cluster located in the severe cold climate region. Temporal variation of PM2.5 was found to coincide with that of levoglucosan. This was attributed to the strong contribution of biomass burning to organic aerosol (the dominant component in PM2.5), as supported by the source apportionment results and high levoglucosan-to-organic carbon (OC) ratios. Furthermore, the variation of biomass burning contribution was inferred to be driven mainly by agricultural fires with relatively low combustion efficiencies, based on a synthesis of the relationship between OC and elemental carbon (EC), the dependence of EC on carbon monoxide, and the relative abundances of different tracers for biomass burning. Nitrate formation was enhanced during biomass burning episodes whereas no evidence was observed to indicate enhanced sulfate formation or net increase of OC mass due to secondary formation. This study demonstrates the importance of open burning as a source of haze pollution in the HC region. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：8

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