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Modelling Molecular Iodine Emissions in a Coastal Marine Environment: the Link to New Particle Formation : Volume 6, Issue 4 (20/03/2006)

By Saiz-lopez, A.

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Book Id: WPLBN0003994694
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Modelling Molecular Iodine Emissions in a Coastal Marine Environment: the Link to New Particle Formation : Volume 6, Issue 4 (20/03/2006)  
Author: Saiz-lopez, A.
Volume: Vol. 6, Issue 4
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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C. Plan, J. M., Mcfiggans, G., Hoffmann, T., Ball, S. M., Jones, R. L., Williams, P. I.,...Saiz-Lopez, A. (2006). Modelling Molecular Iodine Emissions in a Coastal Marine Environment: the Link to New Particle Formation : Volume 6, Issue 4 (20/03/2006). Retrieved from http://ebooklibrary.org/


Description
Description: School of Environmental Sciences, University of East Anglia, Norwich, UK. A model of iodine chemistry in the marine boundary layer (MBL) has been used to investigate the impact of daytime coastal emissions of molecular iodine (I2). The model contains a full treatment of gas-phase iodine chemistry, combined with a description of the nucleation and growth, by condensation and coagulation, of iodine oxide nano-particles. In-situ measurements of coastal emissions of I2 made by the broadband cavity ring-down spectroscopy (BBCRDS) and inductively coupled plasma-mass spectrometry (ICP/MS) techniques are presented and compared to long path differential optical absorption spectroscopy (DOAS) observations of I2 at Mace Head, Ireland. Simultaneous measurements of enhanced I2 emissions and particle bursts show that I2 is almost certainly the main precursor of new particles at this coastal location. The ratio of IO to I2 predicted by the model indicates that the iodine species observed by the DOAS are concentrated over a short distance (about 8% of the 4.2 km light path) consistent with the intertidal zone, bringing them into good agreement with the I2 measurements made by the two in-situ techniques. The model is then used to investigate the effect of iodine emission on ozone depletion, and the production of new particles and their evolution to form stable cloud condensation nuclei (CCN).

Summary
Modelling molecular iodine emissions in a coastal marine environment: the link to new particle formation

 

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