The influence of small aerosol particles on the properties of water and ice clouds.

The influence of small aerosol particles on the properties of water and ice clouds. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

The influence of small aerosol particles on the properties of water and ice clouds. Abstract Text:

T W Choularton,K N Bower,E Weingartner,I Crawford,H Coe,M W Gallagher,M Flynn,J Crosier,P Connolly,A Targino,M R Alfarra,U Baltensperger,S Sjogren,B Verheggen,J Cozic,M Gysel,

In this paper, results are presented of the influence of small organic- and soot-containing particles on the formation of water and ice clouds. There is strong evidence that these particles have grown from nano particle seeds produced by the combustion of oil products. Two series of field experiments are selected to represent the observations made. The first is the CLoud-Aerosol Characterisation Experiment (CLACE) series of experiments performed at a high Alpine site (Jungfraujoch), where cloud was in contact with the ground and the measuring station. Both water and ice clouds were examined at different times of the year. The second series of experiments is the CLOud Processing of regional Air Pollution advecting over land and sea (CLOPAP) series, where ageing pollution aerosol from UK cities was observed, from an airborne platform, to interact with warm stratocumulus cloud in a cloud-capped atmospheric boundary layer. Combining the results it is shown that aged pollution aerosol consists of an internal mixture of organics, sulfate, nitrate and ammonium, the organic component is dominated by highly oxidized secondary material. The relative contributions and absolute loadings of the components vary with location and season. However, these aerosols act as Cloud Condensation Nuclei (CCN) and much of the organic material, along with the other species, is incorporated into cloud droplets. In ice and mixed phase cloud, it is observed that very sharp transitions (extending over just a few metres) are present between highly glaciated regions and regions consisting of supercooled water. This is a unique finding; however, aircraft observations in cumulus suggest that this kind of structure may be found in these cloud types too. It is suggested that this sharp transition is caused by ice nucleation initiated by oxidised organic aerosol coated with sulfate in more polluted regions of cloud, sometimes enhanced by secondary ice particle production in these regions.

The influence of small aerosol particles on the properties of water and ice clouds. Publishing Authors By Initials

TW Choularton,KN Bower,E Weingartner,I Crawford,H Coe,MW Gallagher,M Flynn,J Crosier,P Connolly,A Targino,MR Alfarra,U Baltensperger,S Sjogren,B Verheggen,J Cozic,M Gysel,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

The influence of small aerosol particles on the properties of water and ice clouds. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Faraday discussions

VOLUME: 137

Page Numbers: 205-22; discussion 297-318

Journal Abbreviation: Faraday Discuss.

ISSN: 1359-6640

DAY: 24

MONTH: 01

YEAR: 2008

The influence of small aerosol particles on the properties of water and ice clouds. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9212301

The influence of small aerosol particles on the properties of water and ice clouds. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: The influence of small aerosol particles on the properties of water and ice clouds. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for The influence of small aerosol particles on the properties of water and ice clouds.

AFFILIATION: Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UK.

Country: England

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Faraday Discuss

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

The influence of small aerosol particles on the properties of water and ice clouds Related Publications

• Presidental address.
• The action of electrocortin in the adrenalectomized dog.
• The influence of small aerosol particles on the properties of water and ice clouds.
• [ABOUT ERUPTIVE STRENGTH.]