Real-time measurement of the size fractionation of aerosol black carbon during the South Coast Air Quality Study, June 13-September 4, 1987, Claremont College, Claremont, California: Preliminary report: Appendix, Hourly mean aerosol black carbon concentrations measured during the summer 1987, Southern California air quality study
During the periods June 13 to July 28 and August 17 to September 4, 1987, the Atmospheric Aerosol Group of Lawrence Berkeley Laboratory participated in the South Coast Air Quality Study conducted at Claremont College, Claremont, California. We used a multi-channel aethalometer preceded by size-selective inlets to determine the concentration of aerosol black carbon in two size ranges in real time. We present our results from this study in the form of one-hour and periodic (typically 12-hour) averages of carbon concentrations for the total suspended aerosol and for the fraction having aerodynamic diameter smaller than approximately 0.3 ..mu..m. The total concentration results show daily mean values generally ranging from 1 to 4 ..mu..g/m/sup 3/, with a diurnal cycle showing little variation during nighttime hours and a pronounced peak between the hours of 8 a.m. and 10 a.m.. The results for the size fractionation show that the great majority of the aerosol black carbon was found in the size range smaller than 0.3 ..mu..m: however, this fraction showed a systematic diurnal variation with a decline in the morning and the mid-day periods. This appendix contains only the data.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6955093
- Report Number(s):
- LBL-25348-App.; ON: DE88014862
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Real-time measurement of the size fractionation of aerosol black carbon during the South Coast Air Quality Study, June 13--September 4, 1987, Claremont College, Claremont, California: Final report: Revision
Real-time measurement of the size fractionation of aerosol black carbon during the South Coast Air Quality Study, June 13-September 4, 1987, Claremont College, Claremont, California: Preliminary report
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CARBON BLACK
AEROSOLS
ECOLOGICAL CONCENTRATION
PARTICLE SIZE
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AIR POLLUTION
AIR QUALITY
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COMBUSTION PRODUCTS
EVALUATION
MEASURING INSTRUMENTS
REAL TIME SYSTEMS
TIME DEPENDENCE
CARBON
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DISPERSIONS
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SEPARATION PROCESSES
SIZE
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USA
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)