Development of a black carbon-inclusive multi-media model: Application for PAHs in Stockholm

Prevedouros, Konstantinos; Palm-Cousins, Anna; Gustafsson, Örjan; Cousins, Ian T.

doi:10.1016/j.chemosphere.2007.07.002

Cited by 41 publications

(29 citation statements)

References 36 publications

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“…Matthias et al, 2009;Sehili and Lammel 2007) or the importance of the gas/particle partitioning scheme (e.g. Prevedouros et al, 2008;Lammel et al, 2009).…”

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confidence: 99%

Transpacific transport of benzo[a]pyrene emitted from Asia

Zhang

Tao

et al. 2011

Atmos. Chem. Phys.

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Abstract.A global-scale three dimensional atmospheric transport and chemistry model was applied to simulate transpacific transport of Benzo[a]pyrene (BaP) emitted from Asia. The model results were compared with observations at six monitoring sites. The annual mean and seasonal variation of transport patterns and the contributions of different Asian source regions to transpacific transport flux were investigated. The episodic nature of transpacific transport was also systematically explored. Interannual variability of transpacific transport of BaP was also assessed during the period of . Results showed that strong enhancements of modeled BaP occurred in an area bounded by 70-80 • E and 100-120 • E. Air containing these elevated BaP concentrations was then delivered eastward by westerly winds. When approaching the West Coast of North America, the descending atmospheric motion carried BaP-laden air into the lower atmosphere. The transpacific transport flux was 1.6 times higher in the winter than in the summer. East Asian emission dominates the transpacific transport flux with a contribution of about 97 %. Near ground concentration of BaP induced by Asian sources in North America varied between 1-20 pg m −3 . A case study for observation at Cheeka Peak Observatory during March 2002-May 2002 reveals the importance of warm conveyor belt for transpacific transport. The number of days with transpacific transport flux with a factor of 0.5, 1.0, 1.5, and 2.0 larger than the running mean were 9.4 %, 0.72 %, 0.06 % and 0.01 %, respectively, implying a mild contribution of episodic transport to the long-term

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“…Matthias et al, 2009;Sehili and Lammel 2007) or the importance of the gas/particle partitioning scheme (e.g. Prevedouros et al, 2008;Lammel et al, 2009).…”

mentioning

confidence: 99%

Transpacific transport of benzo[a]pyrene emitted from Asia

Zhang

Tao

et al. 2011

Atmos. Chem. Phys.

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“…Both optimized Freundlich exponents are not equal to one, implying that K BC is dependent on sorbate levels and the sorption of PAHs to soot carbon is a nonlinear process. For LMW PAHs such as Phe, Ant, Pyr, n¡1 has been reported [117,118], but for HMW compounds such as B(a)P, K P was over-predicted by a factor of 2 ∼ 5 by using n¡1 [118]. At the optimum Freundlich exponents, K P values increased by 1.4 ∼ 1.6 log units and 0.7 ∼ 1.3 log units for LMW and HMW PAHs, respectively.…”

Section: Water Column Partitioningmentioning

confidence: 95%

“…If n = 1, this model assumes that soot-water partition was a linear isotherm, otherwise it is a nonlinear process. This model has been applied to multi media and especially the sediment-water (porewater) partitioning [116][117][118]. Considering the similarity of distribution between sediment/water and between particulate/water in sea water column, Equation (3.5) can be reasonably applied to the latter process.…”

Section: Erca 9 55mentioning

confidence: 99%

Air-sea interactions of semi-volatile organic compounds in the tropical environment of Southeast Asia

Balasubramanian

2010

EPJ Web of Conferences

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Abstract. Major urban and industrial centers increase loadings of semi-volatile organic compounds (SVOCs) to proximate sea waters through riverine transport, atmospheric deposition via dry particle deposition, wet deposition, and air-sea gas exchange. In addition to acting as sinks for SVOCs, oceans can act as sources of SVOCs to coastal atmospheres and play important roles in the global biogeochemistry of SVOCs. Particle-sorbed SVOCs can settle to the ocean surface by dry particle deposition, a uni-directional advective transport process from the atmosphere to the water, the removal rate by which is a function of the physical and chemical properties of the aerosols and bound pollutants, meteorological conditions and surface characteristics. In addition, SVOCs are removed from the atmosphere and transported to the waters by precipitation scavenging of atmospheric vapors and particles, which are incorporated into the rain within or below the clouds. After SVOCs are deposited into the bulk seawater, water-column partitioning can affect the distribution of pollutants between the dissolved aqueous and the solid phases and eventually impact the fate of these compounds in oceans. Other than the abovementioned processes, air-sea exchange can make SVOCs diffuse across the air-sea interface; however, the sea surface microlayer (SML), a unique compartment at the air-sea boundary defined operationally as the upper millimeter (1 ∼ 1000 μm) of the sea surface, has large storage capacity to delay the transport of SVOCs across the interface.This article reports the dry particle deposition and wet deposition of selected SVOCs based on an extensive set of yearly data collected in Singapore. Singapore, a representative country of Southeast Asia (SEA), is a small but highly developed island with dense industrial parks in the Southwestern part, where the terrestrial sources affect the surrounding coasts. In this study, Singapore's Southern coastline was chosen during the Northeast monsoon season to evaluate if this coastal area acts a sink or source for selected SVOCs via air-sea diffusive exchange as well as to investigate the SML enrichment effect.

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“…A study on the sensitivity of modelled BaP concentrations on different input parameters has been performed by Hauck et al (2008). Prevedouros et al (2008) developed a multi-media model to determine the influence of sorption to black carbon on the fate of different PAHs in Sweden. The first mesoscale model to include a complete in-line representation of all relevant chemical species was a modified version of the Community Multiscale Air Quality (CMAQ) modelling system (Aulinger et al 2010).…”

Section: Introductionmentioning

confidence: 99%