CORE
🇺🇦
make metadata, not war
Services
Services overview
Explore all CORE services
Access to raw data
API
Dataset
FastSync
Content discovery
Recommender
Discovery
OAI identifiers
OAI Resolver
Managing content
Dashboard
Bespoke contracts
Consultancy services
Support us
Support us
Membership
Sponsorship
Community governance
Advisory Board
Board of supporters
Research network
About
About us
Our mission
Team
Blog
FAQs
Contact us
From hygroscopic aerosols to cloud droplets: The HygrA-CD campaign in the Athens basin — An overview
Authors
A. Papayannis 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.
Publication date
1 January 2017
Publisher
Abstract
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 (< 1–1.2 km height) develops, leading to much higher CCN concentrations (~ 3500–5000 cm− 3 at 1% supersaturation) near the ground; updraft velocities, however, were significantly lower, with an estimated maximum cloud droplet number of ~ 200 cm− 3 and without observed significant PBL cloud formation. The largest contribution to cloud droplet number variance is attributed to the updraft velocity variability, followed by variances in aerosol number concentration. © 2016 Elsevier B.V
Similar works
Full text
Available Versions
Pergamos : Unified Institutional Repository / Digital Library Platform of the National and Kapodistrian University of Athens
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:lib.uoa.gr:uoadl:3005741
Last time updated on 10/02/2023