Significant formation of water-insoluble secondary organic aerosols in semi-arid urban environment

Details Significant formation of water-insoluble secondary organic aerosols in semi-arid urban environment Significant formation of water-insoluble secondary organic aerosols in semi-arid urban environment

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3515801f&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 15, CiteID L15801

Physics

10

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251), Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties

Scientific paper

Diurnal variations of submicron elemental carbon (EC), water-soluble organic carbon (WSOC) and water-insoluble organic carbon (WIOC) were investigated at an urban background site in Cairo (Egypt) from 23 March to 14 April 2005. Well-marked diurnal patterns, with minima during the traffic-influenced morning period (6:00-9:00) and maxima during the intense photochemical period (12:00-15:00), were observed for the WSOC/EC ratio and, more surprisingly, for the WIOC/EC ratio. Such diurnal variations suggest significant formation of both water-soluble and water-insoluble secondary organic aerosols during the afternoon. Applying the EC-tracer method, freshly-formed secondary organic carbon (fresh SOC) was found to possibly account for more than 50% of OC concentrations measured during the 12:00-15:00 period, and this fresh SOC was calculated to be mainly (~60%) composed of water-insoluble species. The latter (unexpected) result could be due to low ambient relative humidity as well as to the importance of anthropogenic volatile organic compounds in Cairo.

Affiliated with

Also associated with

No associations

Rating

Significant formation of water-insoluble secondary organic aerosols in semi-arid urban environment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Significant formation of water-insoluble secondary organic aerosols in semi-arid urban environment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Significant formation of water-insoluble secondary organic aerosols in semi-arid urban environment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1695546