Abstract
During an ongoing study to measure cloud condensation nuclei (CCN) concentrations, a new automated thermal diffusion CCN counter was operated during the months January through June 1994 near the summit of Mt. Lemmon in the Catalina Mountains at about 2700 m elevation. The instrument records data continuously at 5-minute intervals 24 hours a day. The status of the instrument and the data are monitored remotely by telephone modem. For the 123-day, continuous study the average CCN concentration was found to range between a few tens and a few hundred nuclei per cm3 at supersaturations between 0.3 and 0.7%. Diurnal variations were observed, as well as other possible influences, such as wind speed, wind direction and mixing depth. At a constant supersaturation of 0.35% the CCN concentration is typically on the order of 50 to 150 nuclei per cm3. A description of the instrumentation and early observations are presented and discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 263-275 |
| Number of pages | 13 |
| Journal | Atmospheric Research |
| Volume | 43 |
| Issue number | 3 |
| State | Published - Mar 1997 |
Fingerprint
ASJC Scopus subject areas
- Atmospheric Science
- Environmental Science(all)
- Earth and Planetary Sciences(all)
Cite this
Cloud condensation nuclei concentrations in Southern Arizona : Instrumentation and early observations. / Philippin, S.; Betterton, Eric.
In: Atmospheric Research, Vol. 43, No. 3, 03.1997, p. 263-275.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cloud condensation nuclei concentrations in Southern Arizona
T2 - Instrumentation and early observations
AU - Philippin, S.
AU - Betterton, Eric
PY - 1997/3
Y1 - 1997/3
N2 - During an ongoing study to measure cloud condensation nuclei (CCN) concentrations, a new automated thermal diffusion CCN counter was operated during the months January through June 1994 near the summit of Mt. Lemmon in the Catalina Mountains at about 2700 m elevation. The instrument records data continuously at 5-minute intervals 24 hours a day. The status of the instrument and the data are monitored remotely by telephone modem. For the 123-day, continuous study the average CCN concentration was found to range between a few tens and a few hundred nuclei per cm3 at supersaturations between 0.3 and 0.7%. Diurnal variations were observed, as well as other possible influences, such as wind speed, wind direction and mixing depth. At a constant supersaturation of 0.35% the CCN concentration is typically on the order of 50 to 150 nuclei per cm3. A description of the instrumentation and early observations are presented and discussed.
AB - During an ongoing study to measure cloud condensation nuclei (CCN) concentrations, a new automated thermal diffusion CCN counter was operated during the months January through June 1994 near the summit of Mt. Lemmon in the Catalina Mountains at about 2700 m elevation. The instrument records data continuously at 5-minute intervals 24 hours a day. The status of the instrument and the data are monitored remotely by telephone modem. For the 123-day, continuous study the average CCN concentration was found to range between a few tens and a few hundred nuclei per cm3 at supersaturations between 0.3 and 0.7%. Diurnal variations were observed, as well as other possible influences, such as wind speed, wind direction and mixing depth. At a constant supersaturation of 0.35% the CCN concentration is typically on the order of 50 to 150 nuclei per cm3. A description of the instrumentation and early observations are presented and discussed.
UR - http://www.scopus.com/inward/record.url?scp=0030724914&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030724914&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0030724914
VL - 43
SP - 263
EP - 275
JO - Atmospheric Research
JF - Atmospheric Research
SN - 0169-8095
IS - 3
ER -