 |
| Titel |
Optical properties of long-range transported Saharan dust over Barbados as measured by dual-wavelength depolarization Raman lidar measurements |
| VerfasserIn |
S. Groß, V. Freudenthaler, K. Schepanski, C. Toledano, A. Schäfler, A. Ansmann, B. Weinzierl |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 19 ; Nr. 15, no. 19 (2015-10-06), S.11067-11080 |
| Datensatznummer |
250120077
|
| Publikation (Nr.) |
 copernicus.org/acp-15-11067-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| Dual-wavelength Raman and depolarization lidar observations were performed
during the Saharan Aerosol Long-range Transport and Aerosol-Cloud interaction
Experiment in Barbados in June and July 2013 to characterize the optical
properties and vertical distribution of long-range transported Saharan dust
after transport across the Atlantic Ocean. Four major dust events were
studied during the measurements from 15 June to 13 July 2013 with aerosol
optical depths at 532 nm of up to 0.6. The vertical aerosol distribution was
characterized by a three-layer structure consisting of the boundary layer,
the entrainment or mixing layer and the pure Saharan dust layer. The upper
boundary of the pure dust layer reached up to 4.5 km in height. The
contribution of the pure dust layer was about half of the total aerosol
optical depth at 532 nm. The total dust contribution was about 50–70 %
of the total aerosol optical depth at 532 nm. The lidar ratio within the
pure dust layer was found to be wavelength independent with mean values of
53 ± 5 sr at 355 nm and 56 ± 7 sr at 532 nm. For the particle
linear depolarization ratio, wavelength-independent mean values of
0.26 ± 0.03 at 355 nm and 0.27 ± 0.01 at 532 nm have
been found. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|