Effects of Southeast Asia biomass burning on aerosols and ozone concentrations over the Pearl River Delta (PRD) region

Deng, Xuejiao; Tie, Xuexi; Zhou, Xiuji; Wu, Dui; Zhong, Lexuan; Tan, Haobo; Li, Fēi; Huang, Xiao‐Ying; Bi, Xueyan; Deng, Tao

doi:10.1016/j.atmosenv.2008.08.013

Cited by 112 publications

(69 citation statements)

References 37 publications

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“…According to the monthly mean AAOD map ( Figure 4), AAOD in these areas peaks in March, which is similar to the results provided by Duncan et al [96] using Total Ozone Mapping Spectrometer (TOMS) aerosol index data. Recent studies show that biomass burning in Southeast Asia can further influence Southwest China, Pearl River Delta Region though long-range transport [97]. As showed in Figure 2, AAOD in Southwest China and Pearl River Delta Region are also greater than 0.036.…”

Section: Resultsmentioning

confidence: 74%

The Spatial and Temporal Distributions of Absorbing Aerosols over East Asia

et al. 2017

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Abstract:Absorbing aerosols can strongly absorb solar radiation and have a profound impact on the global and regional climate. Black carbon (BC), organic carbon (OC) and dust are three major types of absorbing aerosols. In order to deepen the overall understanding of absorbing aerosols over East Asia and provide a basis for further investigation of its role in enhanced warming in drylands, the spatial-temporal distribution of absorbing aerosols over East Asia for the period of 2005-2016 was investigated based on the Ozone Monitoring Instrument (OMI) satellite retrievals. Overall, high values of Aerosol Absorption Optical Depth (AAOD) mainly distribute near dust sources as well as BC and OC sources. AAOD reaches its maximum during spring over East Asia as a result of dust activity and biomass burning. Single-scattering albedo (SSA) is comparatively high (>0.96) in the most part of East Asia in the summer, indicating the dominance of aerosol scattering. Hyper-arid regions have the highest Aerosol Optical Depth (AOD) and AAOD among the five climatic regions, with springtime values up to 0.72 and 0.04, respectively. Humid and sub-humid regions have relatively high AOD and AAOD during the spring and winter and the highest SSA during the summer. AAOD in some areas shows significant upward trends, which is likely due to the increase of BC and OC emission. SSA shows overall downward trends, indicating the enhancement of the aerosol absorption. Analysis of emission inventory and dust index data shows that BC and OC emissions mainly come from the humid regions, while dust sources mainly distribute in drylands.

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Section: Resultsmentioning

confidence: 74%

The Spatial and Temporal Distributions of Absorbing Aerosols over East Asia

et al. 2017

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“…Winter, summer, and fall measurements were also low at the Zhuzhang background site in southwestern China. However, data were missing for spring when the impact of transported biomass burning plumes from Southeast Asia to air quality in southern China may be greatest (Deng et al, 2008). Surface concentrations of both EC and OC were higher in fall and winter than in summer at most rural sites (except at Wusumu, where data were available for only four months), again suggesting strong region-wide emissions, likely associated with heating.…”

Section: Model Evaluationmentioning

confidence: 98%

“…Within China, biomass burning emissions are highest over central and northeastern China from crop residue burning. Outside China, biomass burning emissions are high over the Indochina Peninsula due to land clearing before the local growing season (spring), which can affect the air quality in southern China through transport (Deng et al, 2008). Table 2 summarizes the emissions of VOC species that are SOC precursors in our model.…”

Section: Bottom-up Emission Inventories Of Ec Oc and Voc Precursorsmentioning

confidence: 99%

Carbonaceous aerosols in China: top-down constraints on primary sources and estimation of secondary contribution

et al. 2012

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Abstract. We simulated elemental carbon (EC) and organic carbon (OC) aerosols in China and compared model results to surface measurements at Chinese rural and background sites, with the goal of deriving "top-down" emission estimates of EC and OC, as well as better quantifying the secondary sources of OC. We included in the model state-of-the-science Chinese "bottom-up" emission inventories for EC (1.92 TgC yr −1 ) and OC (3.95 TgC yr −1 ), as well as updated secondary OC formation pathways. The average simulated annual mean EC concentration at rural and background sites was 1.1 µgC m −3 , 56 % lower than the observed 2.5 µgC m −3 . The average simulated annual mean OC concentration at rural and background sites was 3.4 µgC m −3 , 76 % lower than the observed 14 µgC m −3 . Multiple regression to fit surface monthly mean EC observations at rural and background sites yielded the best estimate of Chinese EC source of 3.05 ± 0.78 TgC yr −1 . Based on the topdown EC emission estimate and observed seasonal primary OC/EC ratios, we estimated Chinese OC emissions to be 6.67 ± 1.30 TgC yr −1 . Using these top-down estimates, the simulated average annual mean EC concentration at rural and background sites was significantly improved to 1.9 µgC m −3 . However, the model still significantly underestimated observed OC in all seasons (simulated average annual mean OC at rural and background sites was 5.4 µgC m −3 ), with little skill in capturing the spatiotemporal variability. Secondary formation accounts for 21 % of Chinese annual mean surface OC in the model, with isoprene being the most important precursor. In summer, as high as 62 % of the observed surface OC may be due to secondary formation in eastern China. Our analysis points to four shortcomings in the current bottom-up inventories of Chinese carbonaceous aerosols: (1) the anthropogenic source is underestimated on a national scale, particularly for OC; (2) the spatiotemporal distributions of emissions are misrepresented; (3) there is a missing source in western China, likely associated with the use of biofuels or other low-quality fuels for heating; and (4) sources in fall are not well represented, either because the seasonal shifting of Published by Copernicus Publications on behalf of the European Geosciences Union. T.-M. Fu et al.: Carbonaceous aerosols in Chinaemissions and/or secondary formation are poorly captured or because specific fall emission events are missing. In addition, secondary production of OC in China is severely underestimated. More regional measurements with better spatiotemporal coverage are needed to resolve these shortcomings.

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“…Several researches have pointed out that March and April are referred to the spring farming season in Southeast Asia, and the biomass burning from the agricultural activities usually emits lots of gaseous (such as NO x , CO, and hydrocarbons) and particulate pollutants. These pollutants not only have severe impact to the local atmospheric environment (Pochanart et al, 2001;Gadde et al, 2009), but also influence the air of South China Sea regions and Southwest China coastal areas (Hsu et al, 2003;Deng et al, 2008), and even deteriorate the air quality of Taiwan Yang et al, 2012). However, long-range transport of air pollutants are often interfered with regional pollutants and it is difficult to clarify the degree of such influence.…”

Section: Compositions Of Particlesmentioning

confidence: 99%

Influence of an Asian Dust Storm and Southeast Asian Biomass Burning on the Characteristics of Seashore Atmospheric Aerosols in Southern Taiwan

Tsai

Huang

Lin

et al. 2012

Aerosol Air Qual. Res.

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This study explores the effects of an Asian dust storm (ADS) and Southeast Asian biomass burning on the composition of atmospheric aerosols in the coastal area of southern Taiwan in spring 2010. Coarse and fine particles were collected using two manual dichotomous samplers (Dichots) that were equipped with Teflon and Quartz filters. The results reveal that the concentrations of PM 10 and PM 2.5 in the ADS period were about twice those before and after this. More than half of water-soluble ions in coarse particles (PM 2.5-10 ) were Cl -and Na + (sea salt), while 70% of water-soluble ions of fine particles were SO 4 2-and NH 4 + (secondary aerosols). The OC/EC ratios of PM 2.5 and PM 2.5-10 were all above 2.0. Over 98% of the metals in coarse and fine particles were crustal elements (98.1-99.1%), and over 60% of the metals in PM 10 were in coarse particles (PM 2.5-10 ). The water-soluble ion, EC, OC, and metal contents in PM 2.5 all exceeded those in PM 2.5-10 . The ADS was associated with higher concentrations of water-soluble ions in PM 2.5 and PM 2.5-10 than was the non-ADS period, except for K + in PM 2.5-10 . ADS most increased the Ca 2+ content and concentration, causing a rise in the average concentrations of Ca 2+ in coarse and fine particles by factors of 3.0 and 3.2, respectively. In the ADS period, although the OC and EC concentrations of coarse and fine particles increased, the OC and EC contents in these particles decreased. The ADS period was associated with higher metal contents in coarse and fine particles than the non-ADS period, and the increase in PM 2.5-10 (more than 2%) exceeded that in PM 2.5 . In PM 2.5-10 and PM 2.5 , the Ca and Ni contents increased the most, respectively. In addition, the concentrations of the water-soluble ions, EC, OC, and metals in PM 2.5-10 and PM 2.5 increased, but their contents decreased, while the contents of the other constituents (= total -(water-soluble ions + EC + OC + metals)) in PM 2.5-10 and PM 2.5 increased. It is also found that Southeast Asian biomass burning is related to the deterioration of the air quality of southern Taiwan.

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Effects of Southeast Asia biomass burning on aerosols and ozone concentrations over the Pearl River Delta (PRD) region

Cited by 112 publications

References 37 publications

The Spatial and Temporal Distributions of Absorbing Aerosols over East Asia

The Spatial and Temporal Distributions of Absorbing Aerosols over East Asia

Carbonaceous aerosols in China: top-down constraints on primary sources and estimation of secondary contribution

Influence of an Asian Dust Storm and Southeast Asian Biomass Burning on the Characteristics of Seashore Atmospheric Aerosols in Southern Taiwan

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