A study of aerosol particle sizes in the atmosphere of Athens, Greece, retrieved from solar spectral measurements

被引:23
作者
Adamopoulos, A. D.
Kambezidis, H. D.
Kaskaoutis, D. G.
Giavis, G.
机构
[1] Natl Observ Athens, Inst Environm Res & Sustainable Dev, Atmospher Res Team, Athens 11810, Greece
[2] Minist Environm Phys Planning & Publ Works, Directorate Air & Noise Pollut Control, Athens 11251, Greece
关键词
aerosol optical depth; aerosol size distribution; solar spectral irradiance; Athens; Greece;
D O I
10.1016/j.atmosres.2007.04.003
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
This work aims at determining the aerosol particle radii in the atmosphere of Athens. Such a work is carried out in Athens for the first time. For this purpose, solar spectral direct-beam irradiance measurements were used in the spectral range 310-575 nm. To estimate the particle radius from aerosol optical depth retrieval, a minimization technique was employed based on the golden-section search of the difference between experimental and theoretical values of the aerosol optical depth. The necessary Mie computations were performed based on the algorithm LVEC. In this study, the mean particle radius of a given distribution was calculated every 30 min during cloudless days in the period November 1996 to September 1997. The largest particles were observed in the summer and the smallest during winter. The result was verified by the increased values of the aerosol optical depth and the turbidity factors calculated in the summer. The differences in the diurnal variation from season to season are attributed to the prevailing wind regime, pollutant emission and sink rates in the atmosphere of Athens. (c) 2007 Elsevier B.V All rights reserved.
引用
收藏
页码:194 / 206
页数:13
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