Aerosol optical extinction during the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign, Colorado, USA
Summertime aerosol optical extinction (<i>β</i><sub>ext</sub>) was measured in the Colorado Front Range and Denver metropolitan area as part of the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) campaign during July–August 2014. An Aerodyne cavity attenua...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-09-01
|
| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/16/11207/2016/acp-16-11207-2016.pdf |
| id |
doaj-845a224fb96a47e495a5dad4eac30785 |
|---|---|
| record_format |
Article |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
J. H. Dingle K. Vu R. Bahreini R. Bahreini E. C. Apel T. L. Campos F. Flocke A. Fried S. Herndon A. J. Hills R. S. Hornbrook G. Huey L. Kaser D. D. Montzka J. B. Nowak M. Reeves D. Richter J. R. Roscioli S. Shertz M. Stell D. Tanner G. Tyndall J. Walega P. Weibring A. Weinheimer |
| spellingShingle |
J. H. Dingle K. Vu R. Bahreini R. Bahreini E. C. Apel T. L. Campos F. Flocke A. Fried S. Herndon A. J. Hills R. S. Hornbrook G. Huey L. Kaser D. D. Montzka J. B. Nowak M. Reeves D. Richter J. R. Roscioli S. Shertz M. Stell D. Tanner G. Tyndall J. Walega P. Weibring A. Weinheimer Aerosol optical extinction during the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign, Colorado, USA Atmospheric Chemistry and Physics |
| author_facet |
J. H. Dingle K. Vu R. Bahreini R. Bahreini E. C. Apel T. L. Campos F. Flocke A. Fried S. Herndon A. J. Hills R. S. Hornbrook G. Huey L. Kaser D. D. Montzka J. B. Nowak M. Reeves D. Richter J. R. Roscioli S. Shertz M. Stell D. Tanner G. Tyndall J. Walega P. Weibring A. Weinheimer |
| author_sort |
J. H. Dingle |
| title |
Aerosol optical extinction during the Front Range Air Pollution and
Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign,
Colorado, USA |
| title_short |
Aerosol optical extinction during the Front Range Air Pollution and
Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign,
Colorado, USA |
| title_full |
Aerosol optical extinction during the Front Range Air Pollution and
Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign,
Colorado, USA |
| title_fullStr |
Aerosol optical extinction during the Front Range Air Pollution and
Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign,
Colorado, USA |
| title_full_unstemmed |
Aerosol optical extinction during the Front Range Air Pollution and
Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign,
Colorado, USA |
| title_sort |
aerosol optical extinction during the front range air pollution and
photochemistry éxperiment (frappé) 2014 summertime field campaign,
colorado, usa |
| publisher |
Copernicus Publications |
| series |
Atmospheric Chemistry and Physics |
| issn |
1680-7316 1680-7324 |
| publishDate |
2016-09-01 |
| description |
Summertime aerosol optical extinction (<i>β</i><sub>ext</sub>) was measured in
the Colorado Front Range and Denver metropolitan area as part of the Front
Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) campaign
during July–August 2014. An Aerodyne cavity attenuated phase shift particle
light extinction monitor (CAPS-PM<sub>ex</sub>) was deployed to measure
<i>β</i><sub>ext</sub> (at average relative humidity of 20 ± 7 %) of
submicron aerosols at <i>λ</i> = 632 nm at 1 Hz. Data from a suite of
gas-phase instrumentation were used to interpret <i>β</i><sub>ext</sub> behavior
in various categories of air masses and sources. Extinction enhancement
ratios relative to CO (Δ<i>β</i><sub>ext</sub> ∕ ΔCO) were
higher in aged urban air masses compared to fresh air masses by
∼ 50 %. The resulting increase in Δ<i>β</i><sub>ext</sub> ∕ ΔCO for highly aged air masses was accompanied
by formation of secondary organic aerosols (SOAs). In addition, the impacts of
aerosol composition on <i>β</i><sub>ext</sub> in air masses under the influence
of urban, natural oil and gas operations (O&G), and agriculture and
livestock operations were evaluated. Estimated non-refractory mass extinction
efficiency (MEE) values for different air mass types ranged from
1.51 to 2.27 m<sup>2</sup> g<sup>−1</sup>, with the minimum and maximum values observed
in urban and agriculture-influenced air masses, respectively. The mass
distribution for organic, nitrate, and sulfate aerosols presented distinct
profiles in different air mass types. During 11–12 August, regional
influence of a biomass burning event was observed, increasing the background
<i>β</i><sub>ext</sub> and estimated MEE values in the Front Range. |
| url |
https://www.atmos-chem-phys.net/16/11207/2016/acp-16-11207-2016.pdf |
| work_keys_str_mv |
AT jhdingle aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT kvu aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT rbahreini aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT rbahreini aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT ecapel aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT tlcampos aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT fflocke aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT afried aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT sherndon aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT ajhills aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT rshornbrook aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT ghuey aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT lkaser aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT ddmontzka aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT jbnowak aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT mreeves aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT drichter aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT jrroscioli aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT sshertz aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT mstell aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT dtanner aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT gtyndall aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT jwalega aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT pweibring aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa AT aweinheimer aerosolopticalextinctionduringthefrontrangeairpollutionandphotochemistryexperimentfrappe2014summertimefieldcampaigncoloradousa |
| _version_ |
1725436503889281024 |
| spelling |
doaj-845a224fb96a47e495a5dad4eac307852020-11-25T00:02:48ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-09-0116112071121710.5194/acp-16-11207-2016Aerosol optical extinction during the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) 2014 summertime field campaign, Colorado, USAJ. H. Dingle0K. Vu1R. Bahreini2R. Bahreini3E. C. Apel4T. L. Campos5F. Flocke6A. Fried7S. Herndon8A. J. Hills9R. S. Hornbrook10G. Huey11L. Kaser12D. D. Montzka13J. B. Nowak14M. Reeves15D. Richter16J. R. Roscioli17S. Shertz18M. Stell19D. Tanner20G. Tyndall21J. Walega22P. Weibring23A. Weinheimer24Environmental Toxicology Graduate Program, University of California, Riverside, CA 92521, USAEnvironmental Toxicology Graduate Program, University of California, Riverside, CA 92521, USAEnvironmental Toxicology Graduate Program, University of California, Riverside, CA 92521, USADepartment of Environmental Sciences, University of California, Riverside, CA 92521, USANational Center for Atmospheric Research, Boulder, CO 80301, USANational Center for Atmospheric Research, Boulder, CO 80301, USANational Center for Atmospheric Research, Boulder, CO 80301, USAInstitute for Arctic and Alpine Research, University of Colorado, Boulder, CO 80303, USAAerodyne Research, Inc., Billerica, MA 01821, USANational Center for Atmospheric Research, Boulder, CO 80301, USANational Center for Atmospheric Research, Boulder, CO 80301, USADepartment of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30033, USANational Center for Atmospheric Research, Boulder, CO 80301, USANational Center for Atmospheric Research, Boulder, CO 80301, USAAerodyne Research, Inc., Billerica, MA 01821, USANational Center for Atmospheric Research, Boulder, CO 80301, USAInstitute for Arctic and Alpine Research, University of Colorado, Boulder, CO 80303, USAAerodyne Research, Inc., Billerica, MA 01821, USANational Center for Atmospheric Research, Boulder, CO 80301, USANational Center for Atmospheric Research, Boulder, CO 80301, USADepartment of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30033, USANational Center for Atmospheric Research, Boulder, CO 80301, USAInstitute for Arctic and Alpine Research, University of Colorado, Boulder, CO 80303, USAInstitute for Arctic and Alpine Research, University of Colorado, Boulder, CO 80303, USANational Center for Atmospheric Research, Boulder, CO 80301, USASummertime aerosol optical extinction (<i>β</i><sub>ext</sub>) was measured in the Colorado Front Range and Denver metropolitan area as part of the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) campaign during July–August 2014. An Aerodyne cavity attenuated phase shift particle light extinction monitor (CAPS-PM<sub>ex</sub>) was deployed to measure <i>β</i><sub>ext</sub> (at average relative humidity of 20 ± 7 %) of submicron aerosols at <i>λ</i> = 632 nm at 1 Hz. Data from a suite of gas-phase instrumentation were used to interpret <i>β</i><sub>ext</sub> behavior in various categories of air masses and sources. Extinction enhancement ratios relative to CO (Δ<i>β</i><sub>ext</sub> ∕ ΔCO) were higher in aged urban air masses compared to fresh air masses by ∼ 50 %. The resulting increase in Δ<i>β</i><sub>ext</sub> ∕ ΔCO for highly aged air masses was accompanied by formation of secondary organic aerosols (SOAs). In addition, the impacts of aerosol composition on <i>β</i><sub>ext</sub> in air masses under the influence of urban, natural oil and gas operations (O&G), and agriculture and livestock operations were evaluated. Estimated non-refractory mass extinction efficiency (MEE) values for different air mass types ranged from 1.51 to 2.27 m<sup>2</sup> g<sup>−1</sup>, with the minimum and maximum values observed in urban and agriculture-influenced air masses, respectively. The mass distribution for organic, nitrate, and sulfate aerosols presented distinct profiles in different air mass types. During 11–12 August, regional influence of a biomass burning event was observed, increasing the background <i>β</i><sub>ext</sub> and estimated MEE values in the Front Range.https://www.atmos-chem-phys.net/16/11207/2016/acp-16-11207-2016.pdf |