Local and regional secondary organic aerosol: Insights from a year of semi-continuous carbon measurements at Pittsburgh. Polidori, A., Turpin, B., J., Lim, H., J., Cabada, J., C., Subramanian, R., Pandis, S., N., & Robinson, A., L. Aerosol Sci. Technol., 40:861-872, 2006. abstract bibtex During the Pittsburgh Air Quality Study (PAQS) an
automated semi-continuous thermal-optical transmittance (TOT)
carbon analyzer was used to measure 2-4 h average particulate
organic (OC) and elemental carbon (EC) concentrations from July 1,
2001 to August 13,2002. To minimize the adsorption of vapor-phase
organics, the sample air was drawn through a multi-channel
parallel-plate diffusion denuder placed upstream of the carbon
analyzer. Particulate OC and EC in the sample air were then
collected on a quartz fiber filter (QFF) mounted inside the carbon
analyzer, and analyzed immediately after collection. To account for
any remaining organic vapors not retained by the denuder and
collected on the sampling filter (positive artifact) a dynamic
blank was run every two weeks. An upper-bound estimate of
volatilization induced by the presence of the denuder upstream of
the sampling filter (negative artifact) was also made. A detailed
description of the operating protocol and quality assurance
measurements is provided. The contributions of primary and
secondary organic aerosol (SOA) to particulate OC were calculated
using an "EC tracer method," which is codified herein. Annual
average SOA accounted for 33% of particulate OC. SOA accounted for
30-40% of monthly average OC from June to November in Pittsburgh,
similar to previous summertime estimates for Atlanta (Lim and
Turpin 2002) and much larger than previous estimates of SOA in the
Los Angeles Basin (Turpin and Huntzicke 1995). Examination of
concentration dynamics suggests that multi-day formation and
regional transport is an important contributor to the higher SOA
contributions to OC in Pittsburgh and suggests that SOA is likely
to be a particularly important contributor to particulate OC in
locations that are recipients of long distance transport, such as
the eastern United States.
C1 Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901
USA. Rutgers Cooperat Extens, New Brunswick, NJ USA.
Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.
@article{
title = {Local and regional secondary organic aerosol: Insights from a year of semi-continuous carbon measurements at Pittsburgh},
type = {article},
year = {2006},
pages = {861-872},
volume = {40},
id = {4b803497-a0f9-3887-8798-47e10426bd73},
created = {2014-10-08T16:28:18.000Z},
file_attached = {false},
profile_id = {363623ef-1990-38f1-b354-f5cdaa6548b2},
group_id = {02267cec-5558-3876-9cfc-78d056bad5b9},
last_modified = {2017-03-14T17:32:24.802Z},
read = {false},
starred = {false},
authored = {false},
confirmed = {true},
hidden = {false},
citation_key = {Polidori:AST:2006a},
source_type = {article},
private_publication = {false},
abstract = {During the Pittsburgh Air Quality Study (PAQS) an
automated semi-continuous thermal-optical transmittance (TOT)
carbon analyzer was used to measure 2-4 h average particulate
organic (OC) and elemental carbon (EC) concentrations from July 1,
2001 to August 13,2002. To minimize the adsorption of vapor-phase
organics, the sample air was drawn through a multi-channel
parallel-plate diffusion denuder placed upstream of the carbon
analyzer. Particulate OC and EC in the sample air were then
collected on a quartz fiber filter (QFF) mounted inside the carbon
analyzer, and analyzed immediately after collection. To account for
any remaining organic vapors not retained by the denuder and
collected on the sampling filter (positive artifact) a dynamic
blank was run every two weeks. An upper-bound estimate of
volatilization induced by the presence of the denuder upstream of
the sampling filter (negative artifact) was also made. A detailed
description of the operating protocol and quality assurance
measurements is provided. The contributions of primary and
secondary organic aerosol (SOA) to particulate OC were calculated
using an "EC tracer method," which is codified herein. Annual
average SOA accounted for 33% of particulate OC. SOA accounted for
30-40% of monthly average OC from June to November in Pittsburgh,
similar to previous summertime estimates for Atlanta (Lim and
Turpin 2002) and much larger than previous estimates of SOA in the
Los Angeles Basin (Turpin and Huntzicke 1995). Examination of
concentration dynamics suggests that multi-day formation and
regional transport is an important contributor to the higher SOA
contributions to OC in Pittsburgh and suggests that SOA is likely
to be a particularly important contributor to particulate OC in
locations that are recipients of long distance transport, such as
the eastern United States.
C1 Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901
USA. Rutgers Cooperat Extens, New Brunswick, NJ USA.
Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.
Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.},
bibtype = {article},
author = {Polidori, A and Turpin, B J and Lim, H J and Cabada, J C and Subramanian, R and Pandis, S N and Robinson, A L},
journal = {Aerosol Sci. Technol.}
}
Downloads: 0
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To minimize the adsorption of vapor-phase\norganics, the sample air was drawn through a multi-channel\nparallel-plate diffusion denuder placed upstream of the carbon\nanalyzer. Particulate OC and EC in the sample air were then\ncollected on a quartz fiber filter (QFF) mounted inside the carbon\nanalyzer, and analyzed immediately after collection. To account for\nany remaining organic vapors not retained by the denuder and\ncollected on the sampling filter (positive artifact) a dynamic\nblank was run every two weeks. An upper-bound estimate of\nvolatilization induced by the presence of the denuder upstream of\nthe sampling filter (negative artifact) was also made. A detailed\ndescription of the operating protocol and quality assurance\nmeasurements is provided. The contributions of primary and\nsecondary organic aerosol (SOA) to particulate OC were calculated\nusing an \"EC tracer method,\" which is codified herein. Annual\naverage SOA accounted for 33% of particulate OC. SOA accounted for\n30-40% of monthly average OC from June to November in Pittsburgh,\nsimilar to previous summertime estimates for Atlanta (Lim and\nTurpin 2002) and much larger than previous estimates of SOA in the\nLos Angeles Basin (Turpin and Huntzicke 1995). Examination of\nconcentration dynamics suggests that multi-day formation and\nregional transport is an important contributor to the higher SOA\ncontributions to OC in Pittsburgh and suggests that SOA is likely\nto be a particularly important contributor to particulate OC in\nlocations that are recipients of long distance transport, such as\nthe eastern United States.\nC1 Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901\nUSA. Rutgers Cooperat Extens, New Brunswick, NJ USA.\nCarnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.\nCarnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.","bibtype":"article","author":"Polidori, A and Turpin, B J and Lim, H J and Cabada, J C and Subramanian, R and Pandis, S N and Robinson, A L","journal":"Aerosol Sci. 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To minimize the adsorption of vapor-phase\norganics, the sample air was drawn through a multi-channel\nparallel-plate diffusion denuder placed upstream of the carbon\nanalyzer. Particulate OC and EC in the sample air were then\ncollected on a quartz fiber filter (QFF) mounted inside the carbon\nanalyzer, and analyzed immediately after collection. To account for\nany remaining organic vapors not retained by the denuder and\ncollected on the sampling filter (positive artifact) a dynamic\nblank was run every two weeks. An upper-bound estimate of\nvolatilization induced by the presence of the denuder upstream of\nthe sampling filter (negative artifact) was also made. A detailed\ndescription of the operating protocol and quality assurance\nmeasurements is provided. The contributions of primary and\nsecondary organic aerosol (SOA) to particulate OC were calculated\nusing an \"EC tracer method,\" which is codified herein. Annual\naverage SOA accounted for 33% of particulate OC. 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Rutgers Cooperat Extens, New Brunswick, NJ USA.\nCarnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA.\nCarnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.},\n bibtype = {article},\n author = {Polidori, A and Turpin, B J and Lim, H J and Cabada, J C and Subramanian, R and Pandis, S N and Robinson, A L},\n journal = {Aerosol Sci. 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