Evidence of an elevated source of nucleation based on model simulations and data from the NIFTy experiment
| Autor: | G. El Afandi, Hannele Korhonen, Paola Crippa, Tuukka Petäjä, Sara C. Pryor |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Chemistry Nucleation 010501 environmental sciences Residual Atmospheric sciences 01 natural sciences lcsh:QC1-999 Computational physics Aerosol lcsh:Chemistry Atmosphere of Earth lcsh:QD1-999 13. Climate action Weather Research and Forecasting Model Ultrafine particle Particle-size distribution Particle size lcsh:Physics 0105 earth and related environmental sciences |
| Zdroj: | Atmospheric Chemistry and Physics, Vol 12, Iss 17, Pp 8021-8036 (2012) |
| DOI: | 10.5194/acpd-12-11979-2012 |
| Popis: | New particle formation has been observed at a number of ground-based measurement sites. Prior research predominantly from Europe has provided evidence that this new particle formation, while observed in the near-surface layer, is actually occurring in atmospheric layers above the surface and appears to be focused in or close to the residual layer formed by the nocturnal inversion. Here, we present both observations and modeling for southern Indiana, which support this postulate. Based on simulations with a detailed aerosol dynamics model and the Weather Research and Forecasting model, along with data from ground-based remote sensing instruments and detailed gas and particle phase measurements, we show evidence that (i) the maximum rate change of ultrafine particle concentrations as observed close to the surface is always preceded by breakdown of the nocturnal inversion and enhancement of vertical mixing and (ii) simulated particle size distributions exhibit greatest accord with surface observations during and subsequent to nucleation only when initialized with a particle size distribution representative of clear atmospheric conditions, rather than the in situ (ground-level) particle size distribution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|