Arid
DOI10.5194/acp-8-1881-2008
Advection patterns and aerosol optical and microphysical properties by AERONET over south-east Italy in the central Mediterranean
Santese, M.; De Tomasi, F.; Perrone, M. R.
通讯作者Santese, M.
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2008
卷号8期号:7页码:1881-1896
英文摘要

Aerosol products by AERONET sun-sky radiometer measurements combined with air-mass backtrajectories were analyzed to identify source regions and pathways of air masses carrying aerosols to south-east Italy, and to determine the dependence of aerosol mean optical properties on advection patterns. Aerosol optical depth (AOD), fine mode fraction (eta), single scattering albedo (SSA), asymmetry factor (g), and lidar ratio (Lr) at 440 nm were used to characterize aerosol properties. The analysis of 5-day-backtrajectories ending in Lecce on south-east Italy and referring to 240 measurement days of the 2003-2004 years revealed that 32% of the measurement days were characterized by air masses coming from all continental European sources with the exception of Spain. 3% of the measurement days were characterized by air masses coming from both the Southern Mediterranean Sea and the Africa continent, and the Western Mediterranean, the Iberian Peninsula, and the Atlantic Ocean. 62% of the measurement days were characterized by mixed advection patterns. We found that AOD, SSA and g average values were not significantly dependent on air mass source regions. In contrast, eta and Lr average values were quite affected by the air mass source region. AOD, eta, SSA, g, and Lr average values, which were equal to 0.29 +/- 0.15, 0.93 +/- 0.03, 0.93 +/- 0.03, 0.67 +/- 0.03, and 72 +/- 20 sr, respectively indicated that the aerosol advected from all continental European sources with the exception of Spain, could be considered representative of "continental average aerosol", mostly made of water soluble and a small amount of soot and insoluble components. Polluted-desert dust particles characterized by AOD= 0.29 +/- 0.05, eta= 0.72 +/- 0.05, SSA= 0.94 +/- 0.03, g= 0.69 +/- 0.02, Lr= 56 +/- 13 sr, were advected over south-east Italy from the Southern Mediterranean Sea and the Africa continent. The Western Mediterranean, the Iberian Peninsula, and the Atlantic Ocean were instead responsible of the advection of maritime-polluted particles, which were characterized by AOD= 0.27 +/- 0.17, eta= 0.8 +/- 0.1, SSA= 0.94 +/- 0.03, g= 0.67 +/- 0.03, Lr= 58 +/- 24 sr. Hence, we found that the aerosol load over south-east Italy was dominated by moderately-absorbing, fine-mode particles even if it was also affected by the minor contribution of desert and maritime type aerosol. The application of an aerosol mask to the data points retrieved on measurement days characterized by mixed advection patterns, supported last comment


类型Article
语种英语
国家Italy
收录类别SCI-E
WOS记录号WOS:000254960800001
WOS关键词SKY RADIANCE MEASUREMENTS ; ROBOTIC NETWORK DATA ; SAHARAN DUST ; RAMAN LIDAR ; TROPOSPHERIC AEROSOL ; SUN-PHOTOMETER ; TRANSPORT ; MARITIME ; GREECE ; BACKSCATTERING
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/156542
作者单位Univ Salento, Dept Phys, CNISM, I-73100 Lecce, Italy
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GB/T 7714
Santese, M.,De Tomasi, F.,Perrone, M. R.. Advection patterns and aerosol optical and microphysical properties by AERONET over south-east Italy in the central Mediterranean[J],2008,8(7):1881-1896.
APA Santese, M.,De Tomasi, F.,&Perrone, M. R..(2008).Advection patterns and aerosol optical and microphysical properties by AERONET over south-east Italy in the central Mediterranean.ATMOSPHERIC CHEMISTRY AND PHYSICS,8(7),1881-1896.
MLA Santese, M.,et al."Advection patterns and aerosol optical and microphysical properties by AERONET over south-east Italy in the central Mediterranean".ATMOSPHERIC CHEMISTRY AND PHYSICS 8.7(2008):1881-1896.
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