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The Vertical Distribution of Aerosols, Saharan Dust and Cirrus Clouds at Rome (Italy) in the Year 2001 : Volume 3, Issue 6 (14/11/2003)

By Gobbi, G. P.

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Book Id: WPLBN0003997489
Format Type: PDF Article :
File Size: Pages 21
Reproduction Date: 2015

Title: The Vertical Distribution of Aerosols, Saharan Dust and Cirrus Clouds at Rome (Italy) in the Year 2001 : Volume 3, Issue 6 (14/11/2003)  
Author: Gobbi, G. P.
Volume: Vol. 3, Issue 6
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2003
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Gobbi, G. P., & Barnaba, F. (2003). The Vertical Distribution of Aerosols, Saharan Dust and Cirrus Clouds at Rome (Italy) in the Year 2001 : Volume 3, Issue 6 (14/11/2003). Retrieved from http://kindle.worldlibrary.net/


Description
Description: Istituto di Scienze dell’Atmosfera e del Clima – CNR, Roma, Italy. A set of 813 lidar profiles of tropospheric aerosol and cirrus clouds extinction and depolarization observed at Rome, Italy, between February 2001 and February 2002 is analyzed and discussed. The yearly record reveals a meaningful contribution of both cirrus clouds (38%) and Saharan dust (12%) to the total optical thickness (OT) of 0.26, at 532 nm. Seasonal analysis shows the planetary boundary layer (PBL) aerosols to be confined below 2 km in winter and 3.8 km in summer, with relevant OT shifting from 0.08 to 0.16, respectively. Cirrus clouds maximize in spring and autumn, in both cases with average OT similar to the PBL aerosols one. With the exception of winter months, Saharan dust is found to represent an important third layer mostly residing between PBL aerosols and cirrus clouds, with yearly average OT~0.03. Saharan dust and cirrus clouds were detected in 20% and in 45% of the observational days, respectively. Validation of the lidar OT retrievals against collocated sunphotometer observations show very good agreement. These results represent one of the few yearly records of tropospheric aerosol vertical profiles available in the literature.

Summary
The vertical distribution of aerosols, Saharan dust and cirrus clouds at Rome (Italy) in the year 2001

 

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