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| Titel |
Marine boundary layer drizzle properties and their impact on cloud property retrieval |
| VerfasserIn |
P. Wu, X. Dong, B. Xi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 9 ; Nr. 8, no. 9 (2015-09-03), S.3555-3562 |
| Datensatznummer |
250116565
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| Publikation (Nr.) |
 copernicus.org/amt-8-3555-2015.pdf |
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| Zusammenfassung |
| In this study, we retrieve and document drizzle properties, and investigate
the impact of drizzle on cloud property retrieval in Dong et al. (2014a)
from ground-based measurements at the ARM Azores facility from June 2009 to
December 2010. For the selected cloud and drizzle samples, the drizzle
occurrence is 42.6 %, with a maximum of 55.8 % in winter and a minimum of
35.6 % in summer. The annual means of drizzle liquid water path
LWPd, effective radius rd, and number concentration Nd for the rain
(virga) samples are 4.73 (1.25) g m−2, 61.5 (36.4) μm, and 0.38
(0.79) cm−3. The seasonal mean LWPd values are less than 3 % of the LWP values
retrieved by the microwave radiometer (MWR). The annual mean differences in cloud-droplet
effective radius with and without drizzle are 0.75 and 2.35 %,
respectively, for the virga and rain samples. Therefore, we conclude that
the impact of drizzle below the cloud base on cloud property retrieval is
insignificant for a solar-transmission-based method, but significant for any
retrievals using radar reflectivity. |
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