Eddy correlation measurements of aerosol deposition to grass
| Autor: | Richard J. Vong, David S. Covert, Dean Vickers |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Meteorology Advection Chemistry Eddy covariance Flux 010501 environmental sciences Atmospheric sciences 01 natural sciences Aerosol Boundary layer 13. Climate action Atmospheric instability Particle Chemical composition 0105 earth and related environmental sciences |
| Zdroj: | Tellus B; Vol 56, No 2 (2004) |
| ISSN: | 0280-6509 1600-0889 |
| Popis: | 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. DOI: 10.1111/j.1600-0889.2004.00098.x |
| Databáze: | OpenAIRE |
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