![Nucleation and growth of new particles in the rural atmosphere of Northern Italy-relationship to air quality monitoring [An article from: Atmospheric Environment]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR7WRA.jpg)
Nucleation and growth of new particles in the rural atmosphere of Northern Italy-relationship to air quality monitoring [An article from: Atmospheric Environment]
Book Details
PublisherElsevier
ISBN / ASINB000RR7WRA
ISBN-13978B000RR7WR1
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
This study investigates the relationship between aerosols number size distribution on the one hand, and air quality in terms of particulate matter (PM) mass concentrations (as usually monitored in the air quality networks) on the other hand. For this purpose, time series of trace gases levels, submicron aerosol size distributions, both recorded at a rural site in Northern Italy (ISPRA), and of trace gas levels and PM mass concentrations, recorded in the air quality network operating in this region, have been compared and interpreted. Because of the regional nature of the PM pollution events, the daily mean levels of the aerosol volume (V), surface area (S) and black carbon (BC) concentrations at ISPRA rural site are well correlated with the daily mean levels of PM mass concentrations recorded at the other air quality monitoring sites. At ISPRA, the submicron aerosol size distribution is strongly influenced by two main competing processes: nucleation of new particles and condensation of gas-phase components onto pre-existing particles (resulting in particles growth). These processes influence on the daily, seasonal and day-to-day variations of the submicron aerosol features. Because increasing aerosol S concentrations favour condensation and hinder nucleation (and vice versa) the 'mean' particle size D"pN (mode of the dN/dlogD size distribution) increases with increasing PM concentrations (e.g. 45nm for V=4@mm^3cm^-^3 and 110nm for V=45@mm^3cm^-^3). Owing to this, time series of aerosol D"pN and V, S, mass and BC concentrations are strongly anti-correlated with those of the smallest ultrafine particle number concentration (N, 5-10 and 10-20nm). Nucleation episodes occur under the clean air conditions prompted by the North-Foehn meteorology. This anti-correlation between submicron aerosol mass and N
Description:
This study investigates the relationship between aerosols number size distribution on the one hand, and air quality in terms of particulate matter (PM) mass concentrations (as usually monitored in the air quality networks) on the other hand. For this purpose, time series of trace gases levels, submicron aerosol size distributions, both recorded at a rural site in Northern Italy (ISPRA), and of trace gas levels and PM mass concentrations, recorded in the air quality network operating in this region, have been compared and interpreted. Because of the regional nature of the PM pollution events, the daily mean levels of the aerosol volume (V), surface area (S) and black carbon (BC) concentrations at ISPRA rural site are well correlated with the daily mean levels of PM mass concentrations recorded at the other air quality monitoring sites. At ISPRA, the submicron aerosol size distribution is strongly influenced by two main competing processes: nucleation of new particles and condensation of gas-phase components onto pre-existing particles (resulting in particles growth). These processes influence on the daily, seasonal and day-to-day variations of the submicron aerosol features. Because increasing aerosol S concentrations favour condensation and hinder nucleation (and vice versa) the 'mean' particle size D"pN (mode of the dN/dlogD size distribution) increases with increasing PM concentrations (e.g. 45nm for V=4@mm^3cm^-^3 and 110nm for V=45@mm^3cm^-^3). Owing to this, time series of aerosol D"pN and V, S, mass and BC concentrations are strongly anti-correlated with those of the smallest ultrafine particle number concentration (N, 5-10 and 10-20nm). Nucleation episodes occur under the clean air conditions prompted by the North-Foehn meteorology. This anti-correlation between submicron aerosol mass and N
