Size-distribution of submicron aerosol particles over the Indian Ocean during IFP-99 of INDOEX

Measurements of the size-distribution of submicron aerosol particles of diameter from 0.003 to 1 μm are made over the Indian Ocean during the IFP-99 of the Indian Ocean Experiment (INDOEX). Measurements are made during the onward journey from Goa to Port Louis, Mauritius from 20 January to 11 Februa...

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Veröffentlicht in:Current Science. - Current Science Association. - 80(2001) vom: Apr., Seite 123-127
1. Verfasser: Murugavel, P. (VerfasserIn)
Weitere Verfasser: Pawar, S. D., Kamra, A. K.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2001
Zugriff auf das übergeordnete Werk:Current Science
Schlagworte:Physical sciences Mathematics Business Applied sciences
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520 |a Measurements of the size-distribution of submicron aerosol particles of diameter from 0.003 to 1 μm are made over the Indian Ocean during the IFP-99 of the Indian Ocean Experiment (INDOEX). Measurements are made during the onward journey from Goa to Port Louis, Mauritius from 20 January to 11 February 1999 onboard ORV Sagar Kanya and during the return journey from Port Louis to Male from 22 February to 1 March 1999 onboard Ronald H. Brown. Observations show large concentrations in the range of 2–6 × 103 particles/cm3 over the Indian Ocean in the northern hemisphere and these drop down to about 500 particles/cm3 in the southern hemisphere. However, the aerosol concentrations show a peak of about 3 × 103 particles/cm3 at 13°S. In the northern hemisphere, the concentration of particles of diameter < 0.0749 μm increases from 14°N to 1°N and then steeply falls. On the other hand, the concentration of particles of diameter > 0.0749 μm keeps decreasing up to 6°S. Size distributions of particles at open sea in the northern hemisphere show a maximum at 0.133 μm and minimum at 0.0422 μm and are generally openended at the smaller size end. The size-distributions of particles are sometimes relatively flat from 0.0133 to 0.237 μm when the particle concentrations are low in the southern hemisphere. The transport and accumulation of aerosol particles in the Inter-Tropical Convergence Zone is discussed. The relative abundance of large versus small particles is examined with respect to the variation of surface atmospheric pressure along the route. 
540 |a Copyright © 2001 Current Science Association 
650 4 |a Physical sciences  |x Chemistry  |x Chemical mixtures  |x Aerosols 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Bodies of water  |x Oceans 
650 4 |a Mathematics  |x Applied mathematics  |x Statistics  |x Applied statistics  |x Descriptive statistics  |x Statistical distributions  |x Size distribution  |x Particle size distribution 
650 4 |a Mathematics  |x Applied mathematics  |x Statistics  |x Applied statistics  |x Descriptive statistics  |x Statistical distributions  |x Size distribution 
650 4 |a Business  |x Industry  |x Industrial sectors  |x Service industries  |x Transportation industries  |x Travel industry  |x Tourism  |x Cruises 
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650 4 |a Physical sciences  |x Physics  |x Fundamental forces  |x Electromagnetism  |x Electromagnetic interactions  |x Electromagnetic noise  |x Atmospherics 
650 4 |a Physical sciences  |x Metrology  |x Altimetry  |x Altitude  |x Sea level 
650 4 |a Applied sciences  |x Engineering  |x Transportation  |x Vehicles  |x Watercraft  |x Ships  |x INDIAN OCEAN EXPERIMENT 
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700 1 |a Pawar, S. D.  |e verfasserin  |4 aut 
700 1 |a Kamra, A. K.  |e verfasserin  |4 aut 
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