| Autor: |
Papayannis, A. Argyrouli, A. Bougiatioti, A. Remoundaki, E. Vratolis, S. Nenes, A. Solomos, S. Komppula, M. Giannakaki, E. Kalogiros, J. Banks, R. Eleftheriadis, K. Mantas, E. Diapouli, E. Tzanis, C.G. Kazadzis, S. Binietoglou, I. Labzovskii, L. Vande Hey, J. Zerefos, C.S. |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Popis: |
The international experimental campaign Hygroscopic Aerosols to Cloud Droplets (HygrA-CD), organized in the Greater Athens Area (GAA), Greece from 15 May to 22 June 2014, aimed to study the physico-chemical properties of aerosols and their impact on the formation of clouds in the convective Planetary Boundary Layer (PBL). We found that under continental (W-NW-N) and Etesian (NE) synoptic wind flow and with a deep moist PBL (~ 2–2.5 km height), mixed hygroscopic (anthropogenic, biomass burning and marine) particles arrive over the GAA, and contribute to the formation of convective non-precipitating PBL clouds (of ~ 16–20 μm mean diameter) with vertical extent up to 500 m. Under these conditions, high updraft velocities (1–2 m s− 1) and cloud condensation nuclei (CCN) concentrations (~ 2000 cm− 3 at 1% supersaturation), generated clouds with an estimated cloud droplet number of ~ 600 cm− 3. Under Saharan wind flow conditions (S-SW) a shallow PBL ( |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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