Size-resolved CCN distributions and activation kinetics of aged continental and marine aerosol

A. Bougiatioti, A. Nenes, Christos Fountoukis, N. Kalivitis, S. N. Pandis, N. Mihalopoulos

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

We present size-segregated measurements of cloud condensation nucleus (CCN) activity of aged aerosol sampled at Finokalia, Crete, during the Finokalia Aerosol Measurement Experiment of summer 2007 (FAME07). From analysis of the data, hygroscopicity and activation kinetics distributions are derived. The CCN are found to be highly hygroscopic, (expressed by a size-and time-averaged hygroscopicity parameter κ ∼ 0.22), with the majority of particles activating at ∼0.5-0.6 % supersaturation. Air masses originating from Central-Eastern Europe tend to be associated with higher CCN concentrations and slightly lower hygroscopicity (κ ∼ 0.18) than for other airmass types. The particles were always well mixed, as reflected by the high activation ratios and narrow hygroscopicity distribution widths. Smaller particles (∼40 nm) were found to be more hygroscopic (∼0.1° units higher) than the larger ones (∼100 nm). The particles with diameters less than 80 nm exhibited a diurnal hygroscopicity cycle (with ° peaking at ∼14 h local time), consistent with photochemical aging and volatilization of less hygroscopic material from the aerosol. Use of bulk chemical composition and the aerosol number distribution results in excellent CCN closure when applying Khler theory in its simplest form. Using asymptotic and threshold droplet growth analysis, the aged organics present in the aerosol were found not to suppress or delay the water uptake kinetics of particles in this environment.

Original languageEnglish
Pages (from-to)8791-8808
Number of pages18
JournalAtmospheric Chemistry and Physics
Volume11
Issue number16
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

hygroscopicity
cloud condensation nucleus
aerosol
kinetics
water uptake
supersaturation
volatilization
air mass
droplet
chemical composition
distribution
particle
summer
experiment

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Size-resolved CCN distributions and activation kinetics of aged continental and marine aerosol. / Bougiatioti, A.; Nenes, A.; Fountoukis, Christos; Kalivitis, N.; Pandis, S. N.; Mihalopoulos, N.

In: Atmospheric Chemistry and Physics, Vol. 11, No. 16, 2011, p. 8791-8808.

Research output: Contribution to journalArticle

Bougiatioti, A. ; Nenes, A. ; Fountoukis, Christos ; Kalivitis, N. ; Pandis, S. N. ; Mihalopoulos, N. / Size-resolved CCN distributions and activation kinetics of aged continental and marine aerosol. In: Atmospheric Chemistry and Physics. 2011 ; Vol. 11, No. 16. pp. 8791-8808.
@article{a1ce1055335f4a11b18b47d8922c75ba,
title = "Size-resolved CCN distributions and activation kinetics of aged continental and marine aerosol",
abstract = "We present size-segregated measurements of cloud condensation nucleus (CCN) activity of aged aerosol sampled at Finokalia, Crete, during the Finokalia Aerosol Measurement Experiment of summer 2007 (FAME07). From analysis of the data, hygroscopicity and activation kinetics distributions are derived. The CCN are found to be highly hygroscopic, (expressed by a size-and time-averaged hygroscopicity parameter κ ∼ 0.22), with the majority of particles activating at ∼0.5-0.6 {\%} supersaturation. Air masses originating from Central-Eastern Europe tend to be associated with higher CCN concentrations and slightly lower hygroscopicity (κ ∼ 0.18) than for other airmass types. The particles were always well mixed, as reflected by the high activation ratios and narrow hygroscopicity distribution widths. Smaller particles (∼40 nm) were found to be more hygroscopic (∼0.1° units higher) than the larger ones (∼100 nm). The particles with diameters less than 80 nm exhibited a diurnal hygroscopicity cycle (with ° peaking at ∼14 h local time), consistent with photochemical aging and volatilization of less hygroscopic material from the aerosol. Use of bulk chemical composition and the aerosol number distribution results in excellent CCN closure when applying Khler theory in its simplest form. Using asymptotic and threshold droplet growth analysis, the aged organics present in the aerosol were found not to suppress or delay the water uptake kinetics of particles in this environment.",
author = "A. Bougiatioti and A. Nenes and Christos Fountoukis and N. Kalivitis and Pandis, {S. N.} and N. Mihalopoulos",
year = "2011",
doi = "10.5194/acp-11-8791-2011",
language = "English",
volume = "11",
pages = "8791--8808",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",
publisher = "European Geosciences Union",
number = "16",

}

TY - JOUR

T1 - Size-resolved CCN distributions and activation kinetics of aged continental and marine aerosol

AU - Bougiatioti, A.

AU - Nenes, A.

AU - Fountoukis, Christos

AU - Kalivitis, N.

AU - Pandis, S. N.

AU - Mihalopoulos, N.

PY - 2011

Y1 - 2011

N2 - We present size-segregated measurements of cloud condensation nucleus (CCN) activity of aged aerosol sampled at Finokalia, Crete, during the Finokalia Aerosol Measurement Experiment of summer 2007 (FAME07). From analysis of the data, hygroscopicity and activation kinetics distributions are derived. The CCN are found to be highly hygroscopic, (expressed by a size-and time-averaged hygroscopicity parameter κ ∼ 0.22), with the majority of particles activating at ∼0.5-0.6 % supersaturation. Air masses originating from Central-Eastern Europe tend to be associated with higher CCN concentrations and slightly lower hygroscopicity (κ ∼ 0.18) than for other airmass types. The particles were always well mixed, as reflected by the high activation ratios and narrow hygroscopicity distribution widths. Smaller particles (∼40 nm) were found to be more hygroscopic (∼0.1° units higher) than the larger ones (∼100 nm). The particles with diameters less than 80 nm exhibited a diurnal hygroscopicity cycle (with ° peaking at ∼14 h local time), consistent with photochemical aging and volatilization of less hygroscopic material from the aerosol. Use of bulk chemical composition and the aerosol number distribution results in excellent CCN closure when applying Khler theory in its simplest form. Using asymptotic and threshold droplet growth analysis, the aged organics present in the aerosol were found not to suppress or delay the water uptake kinetics of particles in this environment.

AB - We present size-segregated measurements of cloud condensation nucleus (CCN) activity of aged aerosol sampled at Finokalia, Crete, during the Finokalia Aerosol Measurement Experiment of summer 2007 (FAME07). From analysis of the data, hygroscopicity and activation kinetics distributions are derived. The CCN are found to be highly hygroscopic, (expressed by a size-and time-averaged hygroscopicity parameter κ ∼ 0.22), with the majority of particles activating at ∼0.5-0.6 % supersaturation. Air masses originating from Central-Eastern Europe tend to be associated with higher CCN concentrations and slightly lower hygroscopicity (κ ∼ 0.18) than for other airmass types. The particles were always well mixed, as reflected by the high activation ratios and narrow hygroscopicity distribution widths. Smaller particles (∼40 nm) were found to be more hygroscopic (∼0.1° units higher) than the larger ones (∼100 nm). The particles with diameters less than 80 nm exhibited a diurnal hygroscopicity cycle (with ° peaking at ∼14 h local time), consistent with photochemical aging and volatilization of less hygroscopic material from the aerosol. Use of bulk chemical composition and the aerosol number distribution results in excellent CCN closure when applying Khler theory in its simplest form. Using asymptotic and threshold droplet growth analysis, the aged organics present in the aerosol were found not to suppress or delay the water uptake kinetics of particles in this environment.

UR - http://www.scopus.com/inward/record.url?scp=80052222328&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052222328&partnerID=8YFLogxK

U2 - 10.5194/acp-11-8791-2011

DO - 10.5194/acp-11-8791-2011

M3 - Article

VL - 11

SP - 8791

EP - 8808

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 16

ER -