Impact of open crop residual burning on air quality over Central Eastern China during the Mount Tai Experiment 2006 (MTX2006)

Yamaji, Katsuhiko; Li, J.; Uno, I.; Kanaya, Yugo; Komazaki, Yuichi; Pochanart, P.; Liu, Y.; Takigawa, Masayuki; Ohara, Toshimasa; Yan, Xiaoyuan; Wang, Z.; Akimoto, Hajime

doi:10.5194/acpd-9-22103-2009

Cited by 20 publications

(19 citation statements)

References 45 publications

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“…However, a sudden change in prevailing winds from South and Southwest to North was observed during 8–10 and 14–15 June 2006, while Mount Tai received air masses originated from East China during 22–25 June 2006 (Figure ). The impact of wheat harvest residue burning emissions in the NCP on Mount Tai aerosols was documented by previous studies [ Fu et al , ; Suthawaree et al , ; Yamaji et al , ]. Consequently, we differentiated the concentration data of hydroxy FAs into two categories as days with high (H‐BBEs: 6–7, 11–14, and 27 June 2006) and low biomass‐burning emissions (L‐BBEs: 15–26 and 28 June 2006).…”

Section: Resultsmentioning

confidence: 91%

Impact of biomass burning on soil microorganisms and plant metabolites: A view from molecular distributions of atmospheric hydroxy fatty acids over Mount Tai

Tyagi

Kawamura

et al. 2016

JGR Biogeosciences

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Biomass burning events (BBEs) in the North China Plain is one of the principal sources of airborne pollutants in China and also for the neighboring countries. To examine the impact of BBEs on soil bacteria and other higher plant metabolites, their tracer compounds, hydroxy fatty acids (FAs), were measured in the bulk particulate matter (total suspended particles (TSP)) over Mount Tai during the period of wheat residue burning in June 2006. Higher inputs of epicuticular waxes and soil microorganisms during high BBEs (H; 6–14 and 27 June) relative to low BBEs (L; 15–26 and 28 June) were characterized by increased concentrations of homologous series of α‐(C9–C32), β‐(C9–C32), and ω‐(C12–C28) hydroxy FAs in TSP samples. However, their relative abundances were not significantly different between H‐BBEs and L‐BBEs, suggesting their common source/transport pathways. We also found higher concentrations of trehalose and mannitol (tracers of soil microbes), and levoglucosan (tracer of biomass combustion) during H‐BBEs than L‐BBEs. These results are consistent with hydroxy FAs, suggesting that they are associated with biomass combustion processes of agricultural wastes as well as re‐suspension of mineral dust and plant pathogens. In addition, enhanced concentrations of endotoxin and mass loading of Gram‐negative bacteria during H‐BBEs (117 endotoxin units (EU) m−3 and 390 ng m−3, respectively) were noteworthy as compared to those in L‐BBEs (22.5 EU m−3 and 75 ng m−3, respectively). Back trajectory analysis and fire spots together with temporal variations of hydroxy FAs revealed an impact of biomass burning on emissions and atmospheric transport of bacteria and plant metabolites.

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Section: Resultsmentioning

confidence: 91%

Impact of biomass burning on soil microorganisms and plant metabolites: A view from molecular distributions of atmospheric hydroxy fatty acids over Mount Tai

Tyagi

Kawamura

et al. 2016

JGR Biogeosciences

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“…Furthermore, Shimada et al (2011) reported that OC/EC ratios and hot spots identified on MODIS images suggest that air pollution from biomass burning is transported to Cape Hedo from the Asian continent in June, although that transport was not clearly evident in the observed data of the present study. According to Yamaji et al (2009) and Kanaya et al (2008), the Mount Tai Experiment in 2006 indicated that agricultural waste burning had a considerable impact on summertime emissions in China, suggesting that the effect of biomass burning might be seasonal. Shimada et al, Aerosol and Air Quality Research, 15: 799-813, 2015 …”

Section: Identification Of Source Categories Of Aerosols Transported mentioning

confidence: 99%

Mode and Place of Origin of Carbonaceous Aerosols Transported From East Asia to Cape Hedo, Okinawa, Japan

Shimada

Takami

et al. 2015

Aerosol Air Qual. Res.

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This study investigated the source categories and emission areas of carbonaceous aerosols transported from East Asia to the East China Sea. Mass concentrations of heavy metals, ionic components, organic carbon, and elemental carbon (EC) were measured at the Cape Hedo Atmosphere and Aerosol Monitoring Station in Okinawa, Japan, throughout 2010. The relative influences of different categories of aerosols were determined by positive matrix factorization, and the source regions of each emissions category were evaluated by using the total potential source contribution function. Five source categories were identified: dust, sea salt and nitrate, secondary species, coal combustion, and oil combustion. The results showed that the major source of aerosols in North China is coal combustion, whereas the major source in South China, Japan, and Korea is oil combustion. The relative contributions of the five sources to EC concentrations at Cape Hedo were dust 7.0%, sea salt and nitrate 19.1%, secondary species 28.5%, oil combustion 12.8%, and coal combustion 32.6%. In particular, wintertime coal combustion in residential areas of North China contributed significantly to EC in 2010. The results also indicate that the contribution of coal combustion in source areas was higher in winter (52%), whereas the contribution of oil combustion was higher in spring (33%).

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“…More detailed information about the emission inventory can be found in Yamaji et al (2008). In this study, REAS emissions were mapped onto a 0.1 • ×0.1 • grid using the distribution of Streets' inventory (personal communication) with 0.1 • resolution.…”

Section: Regional Chemical Transport Modelmentioning

confidence: 99%

Near-ground ozone source attributions and outflow in central eastern China during MTX2006

Wang

Akimoto

et al. 2008

Atmos. Chem. Phys.

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Abstract.A 3-D regional chemical transport model, the Nested Air Quality Prediction Model System (NAQPMS), with an on-line tracer tagging module was used to study the source of the near-ground (<1.5 km above ground level) ozone at Mt. Tai (36.25 • N, 117.10 • E, 1534 m a.s.l.) in Central Eastern China (CEC) during the Mount Tai eXperiment 2006 (MTX2006). The model reproduced the temporal and spatial variations of near-ground ozone and other pollutants, and it captured highly polluted and clean cases well. The simulated near-ground ozone level over CEC was 60-85 ppbv (parts per billion by volume), which was higher than values in Japan and over the North Pacific (20-50 ppbv). The simulated tagged tracer data indicated that the regionalscale transport of chemically produced ozone over other areas in CEC contributed to the greatest fraction (49%) of the near-ground mean ozone at Mt. Tai in June; in situ photochemistry contributed only 12%. Due to high anthropogenic and biomass burning emissions that occurred in the southern part of the CEC, the contribution to ground ozone levels from this area played the most important role (32.4 ppbv, 37.9% of total ozone) in the monthly mean ozone concentration at Mt. Tai; values reached 59 ppbv (62%) on 6-7 June 2006. The monthly mean horizontal distribution of chemically produced ozone from various ozone production regions indicated that photochemical reactions controlled the spatial distribution of O 3 over CEC. The regional-scale transport of pollutants also played an important role in the spatial and temporal distribution of ozone over CEC. Chemically produced ozone from the southern part of the study region can be transported northeastwardly to the northern rim of CEC; the mean contribution was 5-10 ppbv, and it reached 25 ppbv Correspondence to: J. Li (lijie8074@jamstec.go.jp) during high ozone events. Studies of the outflow of CEC ozone and its precursors, as well as their influences and contributions to the ozone level over adjacent regions/countries, revealed that the contribution of CEC ozone to mean ozone mixing ratios over the Korean Peninsula and Japan was 5-15 ppbv, of which about half was due to the direct transport of ozone from CEC and half was produced locally by ozone precursors transported from CEC.

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Impact of open crop residual burning on air quality over Central Eastern China during the Mount Tai Experiment 2006 (MTX2006)

Cited by 20 publications

References 45 publications

Impact of biomass burning on soil microorganisms and plant metabolites: A view from molecular distributions of atmospheric hydroxy fatty acids over Mount Tai

Impact of biomass burning on soil microorganisms and plant metabolites: A view from molecular distributions of atmospheric hydroxy fatty acids over Mount Tai

Mode and Place of Origin of Carbonaceous Aerosols Transported From East Asia to Cape Hedo, Okinawa, Japan

Near-ground ozone source attributions and outflow in central eastern China during MTX2006

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