Imperial College London
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DrAdrianCallaghan

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Lecturer (Royal Society Shooter International Fellow)
 
 
 
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Contact

 

+44 (0)20 7594 6644a.callaghan Website

 
 
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Assistant

 

Miss Rebecca Naessens +44 (0)20 7594 5990

 
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Location

 

Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Callaghan:2013:10.1002/jgrd.50768,
author = {Callaghan, AH},
doi = {10.1002/jgrd.50768},
journal = {Journal of Geophysical Research: Atmospheres},
pages = {9997--9997},
title = {An improved whitecap timescale for sea spray aerosol production flux modeling using the discrete whitecap method},
url = {http://dx.doi.org/10.1002/jgrd.50768},
volume = {118},
year = {2013}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - <jats:title>Abstract</jats:title><jats:p>The discrete whitecap method (DWM) to model the sea spray aerosol (SSA) production flux explicitly requires a whitecap timescale, which up to now has only considered a whitecap decay timescale, <jats:italic>τ</jats:italic><jats:sub>decay</jats:sub>. A reevaluation of the DWM suggests that the whitecap timescale should account for the total whitecap lifetime (<jats:italic>τ</jats:italic><jats:sub>wcap</jats:sub>), which consists of both the formation timescale (<jats:italic>τ</jats:italic><jats:sub>form</jats:sub>) and the decay timescale (timescale definitions are given in the text). Here values of <jats:italic>τ</jats:italic><jats:sub>form</jats:sub> for 552 oceanic whitecaps measured at the Martha's Vineyard Coastal Observatory on the east coast of the USA are presented, and added to the corresponding values of <jats:italic>τ</jats:italic><jats:sub>decay</jats:sub> to form 552 whitecap timescales. For the majority of whitecaps, <jats:italic>τ</jats:italic><jats:sub>form</jats:sub> makes up about 20–25% of <jats:italic>τ</jats:italic><jats:sub>wcap</jats:sub>, but this can be as large as 70% depending on the value of <jats:italic>τ</jats:italic><jats:sub>decay</jats:sub>. Furthermore, an areaweighted mean whitecap timescale for use in the DWM (<jats:italic>τ</jats:italic><jats:sub>DWM</jats:sub>) is defined that encompasses the variable nature of individual whitecap lifetimes within a given time period, and is calculated to be 5.3 s for this entire data set. This value is combined with previously published whitecap coverage parameterizations and estimates of SSA particle production per whitecap area to form a sizeresolved SSA production flux par
AU  - Callaghan,AH
DO  - 10.1002/jgrd.50768
EP  - 9997
PY  - 2013///
SN  - 2169-897X
SP  - 9997
TI  - An improved whitecap timescale for sea spray aerosol production flux modeling using the discrete whitecap method
T2  - Journal of Geophysical Research: Atmospheres
UR  - http://dx.doi.org/10.1002/jgrd.50768
VL  - 118
ER  -
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