Abstract
A Tandem Differential Mobility Analyzer (TMDA) system (1) was used to measure the sensitivity of particle size to relative humidity for monodisperse Los Angeles aerosols. Measurements were made at Claremont, CA on 13 days between 19 June and 3 September 1987, in conjunction with the Southern California Air Quality Study (SCAQS). The particle sizes that were studied ranged from 0.05 μm to 0.5 μm diameter at ambient relative humidity (typically 45-65%). The data provide clear evidence that particles of a given size include both a hygroscopic and a nonhygroscopic fraction, indicating that the aerosol is externally mixed. In addition, for the hygroscopic fraction larger particles (0.4 and 0.5 μm) were relatively more hygroscopic than smaller (0.05 and 0.2 μm) particles.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings - A&WMA Annual Meeting |
| Editors | Anon |
| Publisher | Publ by Air & Waste Management Assoc |
| Volume | 8 |
| State | Published - Dec 1 1989 |
| Event | Proceedings - 82nd A&WMA Annual Meeting - Anaheim, CA, USA Duration: Jun 25 1989 → Jun 30 1989 |
Other
| Other | Proceedings - 82nd A&WMA Annual Meeting |
|---|---|
| City | Anaheim, CA, USA |
| Period | 6/25/89 → 6/30/89 |