Evaluation of a perpendicular inlet for airborne sampling of interstitial submicron black-carbon aerosol

A. E. Perring; J. P. Schwarz; R. S. Gao; A. J. Heymsfield; C. G. Schmitt; M. Schnaiter; D. W. Fahey

doi:10.1080/02786826.2013.821196

Evaluation of a perpendicular inlet for airborne sampling of interstitial submicron black-carbon aerosol

A. E. Perring, J. P. Schwarz, R. S. Gao, A. J. Heymsfield, C. G. Schmitt, M. Schnaiter, D. W. Fahey

Dynamical and Physical Meteorology

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The majority of airborne aerosol measurements employ forward-facing inlets with near-isokinetic sampling; these inlets have known artifacts when sampling in clouds such that data taken in cloud must typically be discarded. Here we report first results from a perpendicular inlet for sampling interstitial submicron black-carbon (BC) containing aerosol. The inlet, consisting of a flat plate to stabilize flow prior to perpendicular sampling, was evaluated using a single particle soot photometer (SP2) aboard the NASA WB-57F aircraft during the Midlatitude Airborne Cirrus Properties Experiment (MACPEX) of 2011. The new inlet rejects large particles and is free of aerosol artifacts when sampling in ice clouds while allowing sampling of submicron BC-containing aerosol with the same unit efficiency as a validated isokinetic inlet, thus allowing for airborne sampling of interstitial BC aerosol.

Original language	English
Pages (from-to)	1066-1072
Number of pages	7
Journal	Aerosol Science and Technology
Volume	47
Issue number	10
DOIs	https://doi.org/10.1080/02786826.2013.821196
State	Published - 2013

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title = "Evaluation of a perpendicular inlet for airborne sampling of interstitial submicron black-carbon aerosol",

abstract = "The majority of airborne aerosol measurements employ forward-facing inlets with near-isokinetic sampling; these inlets have known artifacts when sampling in clouds such that data taken in cloud must typically be discarded. Here we report first results from a perpendicular inlet for sampling interstitial submicron black-carbon (BC) containing aerosol. The inlet, consisting of a flat plate to stabilize flow prior to perpendicular sampling, was evaluated using a single particle soot photometer (SP2) aboard the NASA WB-57F aircraft during the Midlatitude Airborne Cirrus Properties Experiment (MACPEX) of 2011. The new inlet rejects large particles and is free of aerosol artifacts when sampling in ice clouds while allowing sampling of submicron BC-containing aerosol with the same unit efficiency as a validated isokinetic inlet, thus allowing for airborne sampling of interstitial BC aerosol.",

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AU - Perring, A. E.

AU - Schwarz, J. P.

AU - Gao, R. S.

AU - Heymsfield, A. J.

AU - Schmitt, C. G.

AU - Schnaiter, M.

AU - Fahey, D. W.

PY - 2013

Y1 - 2013

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AB - The majority of airborne aerosol measurements employ forward-facing inlets with near-isokinetic sampling; these inlets have known artifacts when sampling in clouds such that data taken in cloud must typically be discarded. Here we report first results from a perpendicular inlet for sampling interstitial submicron black-carbon (BC) containing aerosol. The inlet, consisting of a flat plate to stabilize flow prior to perpendicular sampling, was evaluated using a single particle soot photometer (SP2) aboard the NASA WB-57F aircraft during the Midlatitude Airborne Cirrus Properties Experiment (MACPEX) of 2011. The new inlet rejects large particles and is free of aerosol artifacts when sampling in ice clouds while allowing sampling of submicron BC-containing aerosol with the same unit efficiency as a validated isokinetic inlet, thus allowing for airborne sampling of interstitial BC aerosol.

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M3 - Article

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Evaluation of a perpendicular inlet for airborne sampling of interstitial submicron black-carbon aerosol

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