Arid
DOI10.1175/1520-0450(1996)035<1265:AOPITI>2.0.CO;2
Aerosol optical properties in the Iranian region obtained by ground-based solar radiation measurements in the summer of 1991
Nakajima, T; Hayasaka, T; Higurashi, A; Hashida, G; MoharramNejad, N; Najafi, Y; Valavi, H
通讯作者Nakajima, T
来源期刊JOURNAL OF APPLIED METEOROLOGY
ISSN0894-8763
出版年1996
卷号35期号:8页码:1265-1278
英文摘要

Solar radiation measurements were made using sun photometers and pyranometers during 31 May-7 June 1991 at several places in iran and during 12 June-17 September 1991 at a fixed place, Bushehr, Iran. in the first period the aerosol optical thickness had values about 0.4 at the wavelength of 0.5 mu m in the coastal area and about 0.2 in the plateau area. The Angstrom’s exponent, which is the slope of optical thickness spectrum, had values around 1 for large city areas and less than 0.5 for inland arid areas. Chemical analyses of sampled air indicate an effect of fossil fuel burning from local sources. Such optical and chemical characteristics of atmospheres suggest that soil-derived coarse particles contributed considerably to the atmospheric turbidity in arid areas, whereas an active generation of aerosols was dominant near large cities.


Significant rises in atmospheric turbidity were observed in the earlier part of the second period al Bushehr about once a week with a duration of about one day, which may have been caused by smoke from oil-well fires in Kuwait. The aerosol optical thickness in these events had values of about 1.5, which is equivalent to a columnar aerosol volume of 4.4 x 10(-4) cm(3) cm(-2). The absorption index ranged from 0.005 to 0.02 with several peaks reaching 0.1 in the second period. These peaks can be attributed to prevailing smoke particles. In spite of the large variety of optical thicknesses and absorption indices, there existed stable power-law size distributions with an exponent about 3.7.


类型Article
语种英语
国家JAPAN ; IRAN
收录类别SCI-E
WOS记录号WOS:A1996VE12800009
WOS关键词KUWAIT OIL FIRES ; CLIMATE RESPONSE ; SMOKE ; THICKNESS ; WELLS ; PLUME
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/132935
作者单位(1)TOHOKU UNIV, FAC SCI, SENDAI, MIYAGI 980, JAPAN;(2)DEPT ENVIRONM IRAN, TEHRAN, IRAN
推荐引用方式
GB/T 7714
Nakajima, T,Hayasaka, T,Higurashi, A,et al. Aerosol optical properties in the Iranian region obtained by ground-based solar radiation measurements in the summer of 1991[J],1996,35(8):1265-1278.
APA Nakajima, T.,Hayasaka, T.,Higurashi, A.,Hashida, G.,MoharramNejad, N.,...&Valavi, H.(1996).Aerosol optical properties in the Iranian region obtained by ground-based solar radiation measurements in the summer of 1991.JOURNAL OF APPLIED METEOROLOGY,35(8),1265-1278.
MLA Nakajima, T,et al."Aerosol optical properties in the Iranian region obtained by ground-based solar radiation measurements in the summer of 1991".JOURNAL OF APPLIED METEOROLOGY 35.8(1996):1265-1278.
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