Factors influencing new particle formation at the rural site, Harwell, United Kingdom

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Factors influencing new particle formation at the rural site, Harwell, United Kingdom. / Charron, Aurelie; Birmili, W; Harrison, Roy.

In: Journal of Geophysical Research, Vol. 112, 01.01.2007, p. D14210.

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@article{003cccbd55d34be88ced91c9186564af,
title = "Factors influencing new particle formation at the rural site, Harwell, United Kingdom",
abstract = "[1] A study of large-scale episodes of new particle formation observed at a rural site in southern England which is a receptor site for air masses with varying degrees of pollution is presented. Large-scale episodes of new particle formation are infrequent at Harwell (26 episodes for 1999-2001; data capture of 55%), and it is shown that the most favorable situation for new particle formation in southern England is also infrequent. All episodes but three occurred when clean cool arctic or polar maritime air masses arrived in the UK bringing days of high solar radiation and thin cloud cover. The incursion of these cool air masses may be associated with passage of a cold front and leads to stronger winds and probably strong turbulent mixing; all favor new particle production. More exceptionally, nucleation occurred in warm polluted continental or tropical maritime air masses which shows that different conditions are also possible but much less probable. Higher concentrations of SO2 and higher relative humidity favor higher particle number in agreement with nucleation processes involving H2SO4 and H2O. Taken together, these parameters are insufficient to predict when a burst of particle formation due to nucleation will occur at Harwell, and other important variables must be influential.",
author = "Aurelie Charron and W Birmili and Roy Harrison",
year = "2007",
month = jan,
day = "1",
doi = "10.1029/2007JD008425",
language = "English",
volume = "112",
pages = "D14210",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",

}

RIS

TY - JOUR

T1 - Factors influencing new particle formation at the rural site, Harwell, United Kingdom

AU - Charron, Aurelie

AU - Birmili, W

AU - Harrison, Roy

PY - 2007/1/1

Y1 - 2007/1/1

N2 - [1] A study of large-scale episodes of new particle formation observed at a rural site in southern England which is a receptor site for air masses with varying degrees of pollution is presented. Large-scale episodes of new particle formation are infrequent at Harwell (26 episodes for 1999-2001; data capture of 55%), and it is shown that the most favorable situation for new particle formation in southern England is also infrequent. All episodes but three occurred when clean cool arctic or polar maritime air masses arrived in the UK bringing days of high solar radiation and thin cloud cover. The incursion of these cool air masses may be associated with passage of a cold front and leads to stronger winds and probably strong turbulent mixing; all favor new particle production. More exceptionally, nucleation occurred in warm polluted continental or tropical maritime air masses which shows that different conditions are also possible but much less probable. Higher concentrations of SO2 and higher relative humidity favor higher particle number in agreement with nucleation processes involving H2SO4 and H2O. Taken together, these parameters are insufficient to predict when a burst of particle formation due to nucleation will occur at Harwell, and other important variables must be influential.

AB - [1] A study of large-scale episodes of new particle formation observed at a rural site in southern England which is a receptor site for air masses with varying degrees of pollution is presented. Large-scale episodes of new particle formation are infrequent at Harwell (26 episodes for 1999-2001; data capture of 55%), and it is shown that the most favorable situation for new particle formation in southern England is also infrequent. All episodes but three occurred when clean cool arctic or polar maritime air masses arrived in the UK bringing days of high solar radiation and thin cloud cover. The incursion of these cool air masses may be associated with passage of a cold front and leads to stronger winds and probably strong turbulent mixing; all favor new particle production. More exceptionally, nucleation occurred in warm polluted continental or tropical maritime air masses which shows that different conditions are also possible but much less probable. Higher concentrations of SO2 and higher relative humidity favor higher particle number in agreement with nucleation processes involving H2SO4 and H2O. Taken together, these parameters are insufficient to predict when a burst of particle formation due to nucleation will occur at Harwell, and other important variables must be influential.

U2 - 10.1029/2007JD008425

DO - 10.1029/2007JD008425

M3 - Article

VL - 112

SP - D14210

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

ER -