Sensitivity of CCN spectra on chemical and physical properties of aerosol: A case study from the Amazon Basin
Roberts, G C ; Artaxo, P ; Zhou, Jingchuan LU ; Swietlicki, Erik LU
and Andreae, M O
(2002)
In Journal of Geophysical Research
107(D20).
p.8070-8070
- Abstract
- Organic material, about half of which is water soluble, constitutes nearly 80% of the wet-season aerosol mass in the Amazon Basin, while soluble inorganic salts (predominantly ammonium bisulfate) represent about 15%. A detailed analysis of number distributions and the size-dependent chemical composition of the aerosol indicates that, in principle, the sulfate fraction could account for most of the cloud condensation nuclei (CCN) activity. Uncertainty about the chemical speciation of the water-soluble organic component precludes a rigorous analysis of its contribution to nucleation activity. Within reasonable assumptions, we can, however, predict a similar contribution of the organic component to CCN activity as that from sulfate. Because... (More)
- Organic material, about half of which is water soluble, constitutes nearly 80% of the wet-season aerosol mass in the Amazon Basin, while soluble inorganic salts (predominantly ammonium bisulfate) represent about 15%. A detailed analysis of number distributions and the size-dependent chemical composition of the aerosol indicates that, in principle, the sulfate fraction could account for most of the cloud condensation nuclei (CCN) activity. Uncertainty about the chemical speciation of the water-soluble organic component precludes a rigorous analysis of its contribution to nucleation activity. Within reasonable assumptions, we can, however, predict a similar contribution of the organic component to CCN activity as that from sulfate. Because of the nonlinear dependence of droplet nucleation behavior on solute amount, the nucleation activity cannot be attributed uniquely to the inorganic or organic fractions. The role of water-soluble organic compounds as surfactants, however, may be significant (especially in the case of biomass-burning aerosol) and more field measurements are needed to quantify their effects on the surface tension of ambient aerosols. The parametric dependence of the CCN spectra on the physical and chemical properties of the aerosol show that the number distribution, soluble content of the aerosol, and surface tension effects all play an important role in determining CCN spectra. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/714094
- author
- Roberts, G C
; Artaxo, P
; Zhou, Jingchuan
LU
; Swietlicki, Erik
LU
and Andreae, M O
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Geophysical Research
- volume
- 107
- issue
- D20
- pages
- 8070 - 8070
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000180466200026
- scopus:36448993019
- ISSN
- 2156-2202
- DOI
- 10.1029/2001JD000583
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Nuclear Physics (Faculty of Technology) (011013007)
- id
- c0868274-d5a6-4641-b01a-6095f1082d63 (old id 714094)
- date added to LUP
- 2016-04-04 12:53:18
- date last changed
- 2022-01-29 23:30:24
@article{c0868274-d5a6-4641-b01a-6095f1082d63,
abstract = {{Organic material, about half of which is water soluble, constitutes nearly 80% of the wet-season aerosol mass in the Amazon Basin, while soluble inorganic salts (predominantly ammonium bisulfate) represent about 15%. A detailed analysis of number distributions and the size-dependent chemical composition of the aerosol indicates that, in principle, the sulfate fraction could account for most of the cloud condensation nuclei (CCN) activity. Uncertainty about the chemical speciation of the water-soluble organic component precludes a rigorous analysis of its contribution to nucleation activity. Within reasonable assumptions, we can, however, predict a similar contribution of the organic component to CCN activity as that from sulfate. Because of the nonlinear dependence of droplet nucleation behavior on solute amount, the nucleation activity cannot be attributed uniquely to the inorganic or organic fractions. The role of water-soluble organic compounds as surfactants, however, may be significant (especially in the case of biomass-burning aerosol) and more field measurements are needed to quantify their effects on the surface tension of ambient aerosols. The parametric dependence of the CCN spectra on the physical and chemical properties of the aerosol show that the number distribution, soluble content of the aerosol, and surface tension effects all play an important role in determining CCN spectra.}},
author = {{Roberts, G C and Artaxo, P and Zhou, Jingchuan and Swietlicki, Erik and Andreae, M O}},
issn = {{2156-2202}},
language = {{eng}},
number = {{D20}},
pages = {{8070--8070}},
publisher = {{Wiley-Blackwell}},
series = {{Journal of Geophysical Research}},
title = {{Sensitivity of CCN spectra on chemical and physical properties of aerosol: A case study from the Amazon Basin}},
url = {{http://dx.doi.org/10.1029/2001JD000583}},
doi = {{10.1029/2001JD000583}},
volume = {{107}},
year = {{2002}},
}