| Concept URI | http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6004 | 
|---|---|
| Preferred label | PNSD - Particle Number Size Distribution | 
| Definition | particle number size distribution (PNSD) is the frequency distribution of the particle number concentration represented as a function of the logarithm of particle size, such that the area under the distribution between two sizes is the number concentration of that size range. | 
| Notation | PNSD | 
| Status | Valid | 
| Status Modified | 2025-08-03 | 
| Accepted Date | 2025-08-03 | 
| Not Accepted Date | |
| Recommended unit | |
| Mandatory unit | 
European Environment Agency
                        
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