A quantitative comparison of α-Å turbidity parameter retrieved in different spectral ranges based on spectroradiometer solar radiation measurements

被引:56
作者
Cachorro, VE [1 ]
Vergaz, R [1 ]
de Frutos, AM [1 ]
机构
[1] Univ Valladolid, Fac Sci, Dept Opt & Appl Phys, Atmospher Opt Grp, E-47071 Valladolid, Spain
关键词
aerosols; optical depth; Angstrom parameters; wavelength dependence;
D O I
10.1016/S1352-2310(01)00321-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Spectroradiometric direct irradiance measurements in the 300-1100 nm wavelength range with a spectral resolution of 6.2 nm have been used in a study of the variation in the Angstrom turbidity parameter alpha and its dependence on the spectral range used in its determination. The measurements have been carried out under clear sky conditions at two different climate stations in Spain. Least-square fits of the experimental spectral aerosol optical depth (AOD) to the Angstrom formula in different spectral ranges, selected for convenience depending on the objective or application (e.g., UV-VIS (350-400 nm), VIS (400-670 nm), VIS-NIR (370-870 nm), etc.), result in different sets for the alpha parameter. Due to this dependence on the spectral range, where the alpha -values are determined, a quantitative comparative analysis is carried out in order to assess the differences for a given data-base covering very different atmospheric conditions. The study reveals the necessity of a 'standard spectral range' to achieve confident data comparisons. We show some applications that are relevant for aerosol studies, from UV absorption by aerosols to satellite remote sensing. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:5117 / 5124
页数:8
相关论文
共 24 条
  • [1] INVESTIGATION OF CONTINENTAL AEROSOLS WITH HIGH-SPECTRAL-RESOLUTION SOLAR-EXTINCTION MEASUREMENTS
    AHERN, FJ
    GAUTHIER, RP
    TEILLET, PM
    SIROIS, J
    FEDOSEJEVS, G
    LORENTE, D
    [J]. APPLIED OPTICS, 1991, 30 (36): : 5276 - 5287
  • [2] Angstrom A., 1929, Geogr. Ann., V11, P156, DOI [10.1080/20014422.1929.11880498, DOI 10.2307/519399]
  • [3] [Anonymous], 2001, THESIS U VALLADOLID
  • [4] FITTING ANGSTROM FORMULA TO SPECTRALLY RESOLVED AEROSOL OPTICAL-THICKNESS
    CACHORRO, VE
    GONZALEZ, MJ
    DEFRUTOS, AM
    CASANOVA, JL
    [J]. ATMOSPHERIC ENVIRONMENT, 1989, 23 (01) : 265 - 270
  • [5] DETERMINATION OF THE ANGSTROM TURBIDITY PARAMETERS
    CACHORRO, VE
    DEFRUTOS, AM
    CASANOVA, JL
    [J]. APPLIED OPTICS, 1987, 26 (15) : 3069 - 3076
  • [6] THE INFLUENCE OF ANGSTROM PARAMETERS ON CALCULATED DIRECT SOLAR SPECTRAL IRRADIANCES AT HIGH TURBIDITY
    CACHORRO, VE
    CASANOVA, JL
    DEFRUTOS, AM
    [J]. SOLAR ENERGY, 1987, 39 (05) : 399 - 407
  • [7] Determination of the atmospheric-water-vapor content in the 940-nm absorption band by use of moderate spectral-resolution measurements of direct solar irradiance
    Cachorro, VE
    Utrillas, P
    Vergaz, R
    Duran, P
    de Frutos, AM
    Martinez-Lozano, JA
    [J]. APPLIED OPTICS, 1998, 37 (21): : 4678 - 4689
  • [8] A REVISED STUDY OF THE VALIDITY OF THE GENERAL JUNGE RELATIONSHIP AT SOLAR WAVELENGTHS - APPLICATION TO VERTICAL ATMOSPHERIC AEROSOL LAYER STUDIES
    CACHORRO, VE
    DEFRUTOS, AM
    [J]. ATMOSPHERIC RESEARCH, 1995, 39 (1-3) : 113 - 126
  • [9] Columnar physical and radiative properties of atmospheric aerosols in north central Spain
    Cachorro, VE
    Durán, P
    Vergaz, R
    de Frutos, AM
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2000, 105 (D6) : 7161 - 7175
  • [10] Measurements of the atmospheric turbidity of the north-centre continental area in Spain:: Spectral aerosol optical depth and Angstrom turbidity parameters
    Cachorro, VE
    Durán, P
    Vergaz, R
    de Frutos, AM
    [J]. JOURNAL OF AEROSOL SCIENCE, 2000, 31 (06) : 687 - 702