World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Size Distributions of Non-volatile Particle Residuals (DP<800 Nm) at a Rural Site in Germany and Relation to Air Mass Origin : Volume 6, Issue 3 (27/06/2006)

By Engler, C.

Click here to view

Book Id: WPLBN0003985353
Format Type: PDF Article :
File Size: Pages 38
Reproduction Date: 2015

Title: Size Distributions of Non-volatile Particle Residuals (DP<800 Nm) at a Rural Site in Germany and Relation to Air Mass Origin : Volume 6, Issue 3 (27/06/2006)  
Author: Engler, C.
Volume: Vol. 6, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany

Citation

APA MLA Chicago

Wiedensohler, A., Wehner, B., Gnauk, T., Engler, C., Rose, D., Spindler, G.,...Tuch, T. (2006). Size Distributions of Non-volatile Particle Residuals (DP<800 Nm) at a Rural Site in Germany and Relation to Air Mass Origin : Volume 6, Issue 3 (27/06/2006). Retrieved from http://www.ebooklibrary.org/


Description
Description: Leibniz Institute for Tropospheric Research, Leipzig, Germany. Atmospheric aerosol particle size distributions at a continental background site in Eastern Germany were examined for a one-year period. Particles were classified using a twin differential mobility particle sizer in a size range between 3 and 800 nm. As a novelty, every second measurement of this experiment involved the removal of volatile chemical compounds in a thermodenuder at 300°C. This concept allowed to quantify the number size distribution of non-volatile particle cores – primarily associated with elemental carbon, and to compare this to the original ambient size distribution. A general result was that practically every ambient particle in continental background air contained a non-volatile core. The volume fraction of non-volatile particulate matter (ambient Dp<800 nm) varied between 10 and 30% and was largely consistent with the experimentally determined mass fraction of elemental carbon. The average size of the non-volatile particle cores was estimated as a function of original ambient size using a summation method, which showed that larger particles (>200 nm) contained more non-volatile compounds than smaller particles (<50 nm), thus indicating a significantly different chemical composition. Two alternative air mass classification schemes based on either, synoptic chart analysis (Berliner Wetterkarte) or back trajectories showed, that the volume and number fractions of non-volatile cores were less dependent on air mass than the absolute concentrations in the particle size distributions. In all air masses, the non-volatile size distributions showed a more and a less volatile (soot) mode, which is located in the size range of about 50 nm. During unstable conditions and in maritime air masses, smaller values were observed compared to continental or stable conditions. This reflects the significant emissions of non-volatile material over the continent and, depending on atmospheric stratification, increased concentrations at ground level.

Summary
Size distributions of non-volatile particle residuals (Dp<800 nm) at a rural site in Germany and relation to air mass origin

 

Click To View

Additional Books


  • A Method to Generate Near Real Time Uv-i... (by )
  • Bro, Blizzards, and Drivers of Polar Tro... (by )
  • Simulation of the Dispersion of the Eyja... (by )
  • Air-sea Fluxes of Methanol, Acetone, Ace... (by )
  • Chemically-resolved Aerosol Volatility M... (by )
  • Tropospheric Ozone Variability in the Tr... (by )
  • An Examination of Two Pathway to Tropica... (by )
  • Air Quality and Emissions in the Yangtze... (by )
  • Measurements of Oh and Ho2 Concentration... (by )
  • Averaging Kernels for Doas Total-column ... (by )
  • Rates and Regimes of Photochemical Ozone... (by )
  • A Simple Representation of Surface Activ... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.