World Library  

QR link for Processing of Soot in an Urban Environment: Case Study from the Mexico City Metropolitan Area : Volume 5, Issue 11 (14/11/2005)
Add to Book Shelf
Flag as Inappropriate
Email this Book

Processing of Soot in an Urban Environment: Case Study from the Mexico City Metropolitan Area : Volume 5, Issue 11 (14/11/2005)

By Johnson, K. S.

Click here to view

Book Id: WPLBN0003994288
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Processing of Soot in an Urban Environment: Case Study from the Mexico City Metropolitan Area : Volume 5, Issue 11 (14/11/2005)  
Author: Johnson, K. S.
Volume: Vol. 5, Issue 11
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Molina, L. T., Molina, M. J., Zuberi, B., Laskin, A., Gaspar, D. J., Iedema, M. J.,...Cowin, J. P. (2005). Processing of Soot in an Urban Environment: Case Study from the Mexico City Metropolitan Area : Volume 5, Issue 11 (14/11/2005). Retrieved from http://community.ebooklibrary.org/


Description
Description: Department of Chemistry and of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA. Chemical composition, size, and mixing state of atmospheric particles are critical in determining their effects on the environment. There is growing evidence that soot aerosols play a particularly important role in both climate and human health, but still relatively little is known of their physical and chemical nature. In addition, the atmospheric residence times and removal mechanisms for soot are neither well understood nor adequately represented in regional and global climate models. To investigate the effect of locality and residence time on properties of soot and mixing state in a polluted urban environment, particles of diameter 0.2–2.0 Μm were collected in the Mexico City Metropolitan Area (MCMA) during the MCMA-2003 Field Campaign from various sites within the city. Individual particle analysis by different electron microscopy methods coupled with energy dispersed x-ray spectroscopy, and secondary ionization mass spectrometry show that freshly-emitted soot particles become rapidly processed in the MCMA. Whereas fresh particulate emissions from mixed-traffic are almost entirely carbonaceous, consisting of soot aggregates with liquid coatings suggestive of unburned lubricating oil and water, ambient soot particles which have been processed for less than a few hours are heavily internally mixed, primarily with ammonium sulfate. Single particle analysis suggests that this mixing occurs through several mechanisms that require further investigation. In light of previously published results, the internally-mixed nature of processed soot particles is expected to affect heterogeneous chemistry on the soot surface, including interaction with water during wet-removal.

Summary
Processing of soot in an urban environment: case study from the Mexico City Metropolitan Area

 

Click To View

Additional Books


  • Comparison of Tropospheric Chemistry Sch... (by )
  • Influence of Along-valley Terrain Hetero... (by )
  • Internally Mixed Soot, Sulfates, and Org... (by )
  • Reply to: “tropical Cirrus and Water Vap... (by )
  • Odin-osiris Stratospheric Aerosol Data P... (by )
  • Impact of Black Carbon Aerosol Over Ital... (by )
  • A Comparison Study of Regional Atmospher... (by )
  • Carbon Balance of China Constrained by C... (by )
  • Coastal Measurements of Short-lived Reac... (by )
  • Trajectory Mapping of Middle Atmospheric... (by )
  • Seasonal Changes in the Tropospheric Car... (by )
  • Data Assimilation of Stratospheric Const... (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.