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Original Research Papers

Eddy correlation measurements of aerosol deposition to grass

Authors:

Richard J. Vong ,

College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR, 97331-5503, US
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Dean Vickers,

College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR, 97331-5503, US
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David S. Covert

Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, US
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Abstract

An experiment was conducted to measure aerosol turbulent fluxes to a grass field. A new high-flow-rate aerosol sensor was deployed from a tower to make eddy correlation (EC) measurements of aerosol turbulent flux and deposition velocity. The EC data were screened and analysed for uncertainties associated with advection, boundary layer growth, instrument separation and counting particles. An apparent bias in the aerosol flux due to particle hygroscopic growth was evaluated from chemical and microphysical measurements and removed from the results based on derived corrections. The resulting aerosol deposition velocity for 0.52 μm diameter particles depended on atmospheric stability with values of 0.3 cm s−1 during near-neutral stability, 0.44 cm s−1 during unstable periods and 0.16 cm s−1 during stable periods with an estimated uncertainty of ±0.07 cm s−1 due to chemical composition and particle counting.

How to Cite: Vong, R.J., Vickers, D. and Covert, D.S., 2004. Eddy correlation measurements of aerosol deposition to grass. Tellus B: Chemical and Physical Meteorology, 56(2), pp.105–117. DOI: http://doi.org/10.3402/tellusb.v56i2.16414
  Published on 01 Jan 2004
 Accepted on 4 Dec 2003            Submitted on 2 Jan 2003

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