Size-dependent aerosol deposition velocities during BEARPEX'07
| Autor: | Dean Vickers, I. J. Vong, D. S. Covert, Richard J. Vong |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Atmospheric Science
Daytime Range (particle radiation) 010504 meteorology & atmospheric sciences Chemistry Eddy covariance 010501 environmental sciences Atmospheric sciences complex mixtures 01 natural sciences lcsh:QC1-999 Aerosol lcsh:Chemistry Aerosol deposition lcsh:QD1-999 13. Climate action Particle Shear velocity Water vapor lcsh:Physics 0105 earth and related environmental sciences |
| Zdroj: | Atmospheric Chemistry and Physics, Vol 10, Iss 12, Pp 5749-5758 (2010) |
| DOI: | 10.5194/acpd-10-4649-2010 |
| Popis: | Aerosol concentrations and 3-D winds were measured from 9 to 25 September 2007, above a pine forest in California. The measurements were combined using the eddy covariance (EC) technique to determine aerosol eddy fluxes as a function of particle diameter within the accumulation mode size range (0.25 μm≤Dp≤1 μm here). Measured heat and water vapor fluxes were utilized to correct the aerosol eddy fluxes for aerosol hygroscopic growth. The hygroscopic growth correction was necessary despite the low RH and relatively hygrophobic nature of the particles. Uncertainties associated with particle counting also were evaluated from the data. Aerosol deposition velocities (Vd = EC turbulent flux/mean particle concentration) during daytime were shown to vary from −0.2 to −1.0 cm s−1; the magnitude of particle Vd increases with friction velocity and particle diameter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|