Intercomparison of two different thermal-optical elemental carbons and optical black carbon during ABC-EAREX2005

Bae, Min‐Suk; Hong, Chun-Sang; Kim, Young Jin; Han, Jin-Seok; Moon, Kyungsun; Kondo, Yutaka; Komazaki, Yuichi; Miyazaki, Y.

doi:10.1016/j.atmosenv.2006.11.040

Cited by 27 publications

(19 citation statements)

References 23 publications

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“…BC and EC are two carbon fractions typically defined by their measurement technique: BC is measured optically while EC is obtained from thermal and thermaloptical methods. According to the EPA Report to Congress on Black Carbon (http://www.epa.gov/blackcarbon/), about 70 % of recent studies (year 2000 or later) that compared ambient BC and EC measurements in a wide variety of environments reported consistently obtaining a high correlation with an average of R = 0.86 ± 0.11 (Allen et al, 1999;Bae et al, 2007;Hitzenberger et al, 2006;Sahu et al, 2009;Miyazaki et al, 2008;Husain et al, 2007;Hagler et al, 2007), while the other 30 % report very low BC : EC ratios (∼0.5) and very high BC : EC ratios (∼2) (Chow et al, 2009; Babich et al, 2000;Jeong et al, 2004;Lim et al, 2003). These inter-comparison data are based on ambient measurements and not on source measurements.…”

Section: Hyytiälä Smear II (Station For Measuring Forestmentioning

confidence: 99%

Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM

et al. 2013

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The prediction skill of the regional aerosol–climate model REMO-HAM was assessed against the black carbon (BC) concentration measurements from five locations in Finland, with focus on Hyytiälä station for the year 2005. We examined to what extent the model is able to reproduce the measurements using several statistical tools: median comparison, overlap coefficient (OVL; the common area under two probability distributions curves) and Z score (a measure of standard deviation, shape and spread of the distributions). The results of the statistics showed that the model is biased low. The local and regional emissions of BC have a significant contribution, and the model tendency to flatten the observed BC is most likely dominated by the lack of domestic burning of biofuel in the emission inventories. A further examination of the precipitation data from both measurements and model showed that there is no correlation between REMO's excessive precipitation and BC underestimation. This suggests that the excessive wet removal is not the main cause of the low black carbon concentration output. In addition, a comparison of wind directions in relation with high black carbon concentrations shows that REMO-HAM is able to predict the BC source directions relatively well. Cumulative black carbon deposition fluxes over Finland were estimated, including the deposition on snow

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Section: Hyytiälä Smear II (Station For Measuring Forestmentioning

confidence: 99%

Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM

et al. 2013

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“…The most prevalent on-line techniques are bulk aerosol mass spectrometers, single particle mass spectrometers, and thermo-optical (Bae et al, 2007;Canagaratna et al, 2007;Murphy, 2007). Although these techniques are useful for quantification of bulk organic matter, they have limited application for molecular level understanding of organic aerosol.…”

Section: R C Moffet Et Al: Microscopic Characterization Of Carbonamentioning

confidence: 99%

Microscopic characterization of carbonaceous aerosol particle aging in the outflow from Mexico City

et al. 2010

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Abstract. This study was part of the Megacities Initiative: Local and Global Research Observations (MILAGRO) field campaign conducted in Mexico City metropolitan area during spring 2006. The physical and chemical transformations of particles aged in the outflow from Mexico City were investigated for the transport event of 22 March 2006. A detailed chemical analysis of individual particles was performed using a combination of complementary microscopy and micro-spectroscopy techniques. The applied techniques included scanning transmission X-ray microscopy (STXM) coupled with near edge X-ray absorption fine structure spectroscopy (NEXAFS) and computer controlled scanning electron microscopy with an energy dispersive X-ray analyzer (CCSEM/EDX). As the aerosol plume evolves from the city center, the organic mass per particle increases and the fraction of carbon-carbon double bonds (associated with elemental carbon) decreases. Organic functional groups enhanced with particle age include: carboxylic acids, alkyl groups, and oxygen bonded alkyl groups. At the city center (T0) the most prevalent aerosol type contained inorganic species (composed of sulfur, nitrogen, oxygen, and potassium) coated with organic material. At the T1 and T2 sites, located northeast of T0 (∼29 km and ∼65 km, respectively), the fraction of homogenously mixed organic particles increased in both Correspondence to: M. K. Gilles (mkgilles@lbl.gov) size and number. These observations illustrate the evolution of the physical mixing state and organic bonding in individual particles in a photochemically active environment.

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“…이에 고산에서는 PM 2.5 중 OC와 EC의 장거리 수송 및 계절적 영향을 살펴 보기 위한 연구가 여러 차례 수행되었다 (Batmunkh et al, 2011;Lim et al, 2010;Lee et al, 2008;Moon et al, 2008;Bae et al, 2007;Lee et al, 2007;Song et al, 2006;Han et al, 2005;Shin et al, 2002;Kim et al, 1998;Lee et al, 1997). 대부분 약 24시간 동안 석영 필터에 시료를 포집한 후에 탄소 분석을 하였 으며 (Lim et al, 2010;Lee et al, 2008;Moon et al, 2008;Han et al, 2005;Shin et al, 2002;Kim et al, 1998;Lee et al, 1997), 준실시간으로 분석한 경우에도 단기간 동안의 집중측정이 대부분이었다 (Batmunkh et al, 2011;Bae et al, 2007;Lee et al, 2007;Song et al, 2006). 필터팩을 이용해 시료 채취시를 할 경우 에는 긴 시간 동안 포집된 반휘발성 화학물질들 Malaguti et al, 2013;Kang et al, 2010) (Chow et al, 2001).…”

Section: 고산 측정소는 동아시아 대륙의 풍하지역에 위치unclassified

Semi-continuous Measurements of PM_2.5OC and EC at Gosan: Seasonal Variations and Characteristics of High-concentration Episodes

Han¹,

Bahng²,

Lee³

et al. 2013

Journal of Korean Society for Atmospheric Environment

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Intercomparison of two different thermal-optical elemental carbons and optical black carbon during ABC-EAREX2005

Cited by 27 publications

References 23 publications

Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM

Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM

Microscopic characterization of carbonaceous aerosol particle aging in the outflow from Mexico City

Semi-continuous Measurements of PM_2.5OC and EC at Gosan: Seasonal Variations and Characteristics of High-concentration Episodes

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Intercomparison of two different thermal-optical elemental carbons and optical black carbon during ABC-EAREX2005

Cited by 27 publications

References 23 publications

Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM

Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM

Microscopic characterization of carbonaceous aerosol particle aging in the outflow from Mexico City

Semi-continuous Measurements of PM2.5OC and EC at Gosan: Seasonal Variations and Characteristics of High-concentration Episodes

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Semi-continuous Measurements of PM_2.5OC and EC at Gosan: Seasonal Variations and Characteristics of High-concentration Episodes