 |
| Titel |
Aircraft testing of the new Blunt-body Aerosol Sampler (BASE) |
| VerfasserIn |
A. Moharreri, L. Craig, P. Dubey, D. C. Rogers, S. Dhaniyala |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 9 ; Nr. 7, no. 9 (2014-09-23), S.3085-3093 |
| Datensatznummer |
250115907
|
| Publikation (Nr.) |
 copernicus.org/amt-7-3085-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| There is limited understanding of the role of aerosols in the formation and
modification of clouds, partly due to inadequate data on such systems.
Aircraft-based aerosol measurements in the presence of cloud particles have
proven to be challenging because of the problem of cloud droplet/ice particle
shatter and the generation of secondary artifact particles that contaminate
aerosol samples. Recently, the design of a new aircraft inlet, called the
Blunt-body Aerosol Sampler (BASE), which enables sampling of interstitial
aerosol particles, was introduced. Numerical modeling results and laboratory
test data suggested that the BASE inlet should sample interstitial particles
with minimal shatter particle contamination. Here, the sampling performance
of the inlet is established from aircraft-based measurements. Initial
aircraft test results obtained during the PLOWS (Profiling of Winter Storms)
campaign indicated two problems with the original BASE design: separated
flows around the BASE at high altitudes and a significant shatter problem
when sampling in drizzle. The test data were used to improve the accuracy of
flow and particle trajectory modeling around the inlet, and the results from
the improved flow model were used to guide design modifications of the BASE to
overcome the problems identified in its initial deployment. The performance
of the modified BASE was tested during the ICE–T (Ice in Clouds Experiment –
Tropics) campaign, and the inlet was seen to provide near shatter-free
measurements in a wide range of cloud conditions. The initial aircraft test
results, design modifications, and the performance characteristics of the BASE
relative to another interstitial inlet, the submicron aerosol inlet (SMAI),
are presented. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|